{"title":"DC Products","description":"","products":[{"product_id":"tkm2","title":"TKM2 Track Voltage Tester","description":"\u003cp data-start=\"181\" data-end=\"437\"\u003eThe \u003cstrong data-start=\"185\" data-end=\"230\"\u003eBLOCKsignalling TKM2 Track Voltage Tester\u003c\/strong\u003e is designed to help locate voltage drops and poor track connections that can affect the smooth operation of model locomotives. It provides a quick and simple way to check track voltage anywhere on a layout.\u003c\/p\u003e\n\u003cp data-start=\"439\" data-end=\"610\"\u003eTo use the tester, simply place it on the track and the built-in LEDs will illuminate to indicate the voltage present, allowing issues to be identified quickly and easily.\u003c\/p\u003e\n\u003chr data-start=\"612\" data-end=\"615\"\u003e\n\u003ch2 data-start=\"617\" data-end=\"632\"\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eClear LED indication of track voltage.\u003cbr data-start=\"890\" data-end=\"893\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eHelps locate voltage drops and poor track connections.\u003cbr data-start=\"948\" data-end=\"951\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eFast and easy to use with no setup required.\u003cbr data-start=\"996\" data-end=\"999\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for routine testing and fault finding.\u003cbr data-start=\"1047\" data-end=\"1050\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatible with both DC and DCC layouts.\u003cbr data-start=\"1091\" data-end=\"1094\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eContact spacing designed for Z, N, TT, HO, and OO gauges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"931\" data-end=\"934\"\u003e\n\u003ch2 data-start=\"936\" data-end=\"956\"\u003eApplication \u0026amp; Use\u003c\/h2\u003e\n\u003cp data-start=\"958\" data-end=\"1053\"\u003eIdeal for model railway fault finding, checking track power consistency, testing wiring sections, and diagnosing running issues across DC and DCC layouts.\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56825024676185,"sku":null,"price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/TT14_19b36025-de19-48f1-b864-9e793c5fcb80.png?v=1777334015"},{"product_id":"pts1","title":"PTS1 Shuttle Controller","description":"\u003cp data-start=\"19\" data-end=\"282\"\u003eThe \u003cstrong\u003eBLOCKsignalling PTS1\u003c\/strong\u003e is an automatic DC shuttle controller with integrated points control, designed to automate up to three DC model trains running backwards and forwards along defined sections of track.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"587\"\u003eThe module automatically controls track polarity, switching trains between routes and sidings using connected solenoid points motors. By combining shuttle control, automatic routing, and points operation into a single unit, the PTS1 enables complex automated train movements without manual intervention.\u003c\/p\u003e\n\u003cp data-start=\"589\" data-end=\"871\"\u003eA wide range of track configurations can be used, from simple end-to-end shuttles to more advanced multi-route layouts with automatic train sequencing and route selection. The built-in Capacitor Discharge Unit (CDU) provides a reliable 25V DC output for dependable points operation.\u003c\/p\u003e\n\u003cp data-start=\"873\" data-end=\"1079\"\u003eThe PTS1 includes multiple built-in operating programs supporting different track arrangements and train movement sequences, along with adjustable fixed or random waiting times for more realistic operation.\u003c\/p\u003e\n\u003chr data-end=\"641\" data-start=\"638\"\u003e\n\u003ch3 data-end=\"658\" data-start=\"643\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eAutomatically operates one, two, or three DC trains running back and forth along a line.\u003cbr data-end=\"1186\" data-start=\"1183\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eSupports a wide range of route layouts and track configurations.\u003cbr data-end=\"1253\" data-start=\"1250\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eAutomatically changes points to route trains between tracks and sidings.\u003cbr data-end=\"1328\" data-start=\"1325\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eBuilt-in Capacitor Discharge Unit (CDU) providing a 25V DC output for reliable solenoid points operation.\u003cbr data-end=\"1436\" data-start=\"1433\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eIncludes built-in programs supporting multiple automatic route and train movement combinations.\u003cbr data-end=\"1534\" data-start=\"1531\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eProgrammable fixed or random waiting times for more varied and realistic operation.\u003cbr data-end=\"1620\" data-start=\"1617\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eAdjustable transit timing and sequence repeat settings.\u003cbr data-end=\"1678\" data-start=\"1675\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eAllows fully automated train sequencing without manual intervention.\u003cbr data-end=\"1749\" data-start=\"1746\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eCompatible with standard solenoid (twin-coil) points motors.\u003cbr data-end=\"1812\" data-start=\"1809\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1142\" data-start=\"660\"\u003eLED indications assist with setup, programming, and troubleshooting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1147\" data-start=\"1144\"\u003e\n\u003ch3 data-end=\"1175\" data-start=\"1149\"\u003eElectrical Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1253\" data-start=\"1177\"\u003e12V DC regulated power supply required.\u003cbr data-end=\"1951\" data-start=\"1948\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1253\" data-start=\"1177\"\u003eTypical current consumption: approximately 250mA.\u003cbr data-end=\"2003\" data-start=\"2000\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1253\" data-start=\"1177\"\u003eRecommended power supply rating: 0.5A to 1A.\u003cbr data-end=\"2050\" data-start=\"2047\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1253\" data-start=\"1177\"\u003eRequires a DC locomotive speed controller (throttle).\u003cbr data-end=\"2161\" data-start=\"2158\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1253\" data-start=\"1177\"\u003eDo not connect directly to train controller accessory outputs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1258\" data-start=\"1255\"\u003e\n\u003ch3 data-end=\"1286\" data-start=\"1260\"\u003eBasic Wiring Configuration\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/pts1_9f374aef-98ee-45be-995d-57913bc3e366.png?v=1778160243\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1258\" data-start=\"1255\"\u003e\n\u003ch3 data-end=\"1286\" data-start=\"1260\"\u003eWiring 1 Set of Points\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/pts2_dbb815eb-8a24-4dd5-b20c-67832f16fde8.png?v=1778160261\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1258\" data-start=\"1255\"\u003e\n\u003ch3 data-end=\"1286\" data-start=\"1260\"\u003eWiring Points at Each End\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/pts3_0e3a0b02-bbee-4e7b-a6a2-4483e3fa068f.png?v=1778160274\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1258\" data-start=\"1255\"\u003e\n\u003ch3 data-end=\"1286\" data-start=\"1260\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1435\" data-start=\"1288\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1435\" data-start=\"1288\"\u003e\u003ca rel=\"noopener\" title=\"PTS1\" href=\"https:\/\/drive.google.com\/file\/d\/1kSdQ6uTxum8nmCGf_HseZlTrmi9RWvZm\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56825534644569,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PTS1_Image_Diodes1.jpg?v=1780765693"},{"product_id":"ss2a","title":"SS2A DC Shuttle Controller with Acceleration and Speed Control","description":"\u003cp data-start=\"549\" data-end=\"828\"\u003eThe \u003cstrong\u003eBLOCKsignalling SS2A\u003c\/strong\u003e is part of a new range of DC shuttle controllers with built-in acceleration and deceleration. It automatically operates a model train back and forth along a defined section of track, adding movement and interest to any model railway layout.\u003c\/p\u003e\n\u003cp data-start=\"830\" data-end=\"1141\"\u003eAt each end of the line the train stops when it crosses an insulated track gap, cutting power to the locomotive. The module then reverses the track polarity, allowing the train to depart in the opposite direction. Waiting times can be adjusted between one second and ten minutes using a simple on-board control.\u003c\/p\u003e\n\u003cp data-start=\"1143\" data-end=\"1296\"\u003eThe SS2A also includes a built-in DC throttle, allowing the train speed to be set directly on the module and removing the need for a separate controller.\u003c\/p\u003e\n\u003chr data-end=\"921\" data-start=\"918\"\u003e\n\u003ch3 data-end=\"938\" data-start=\"923\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eAutomatically operates a DC train back and forth along a single-track section.\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eAdjustable waiting time at each end of the line using a simple screwdriver control.\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eBuilt-in DC speed control, eliminating the need for a separate throttle.\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eSmooth acceleration for more realistic train departures.\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eLED indicators on the PCB show forward and reverse operation.\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eSupports both fixed and random delay settings for more varied operation.\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eSuitable for OO, HO and smaller locomotives.\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eBuilt-in protection and high-frequency motor drive for smooth, quiet operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1436\" data-start=\"1433\"\u003e\n\u003ch3 data-end=\"1464\" data-start=\"1438\"\u003eElectrical Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003e12V DC regulated power supply required.\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003eRecommended supply rating: 0.5A to 1A.\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003e\n\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eCan \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003ebe \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003epowered \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eusing \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eeither \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003ea \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003estandard \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eDC \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003epower \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003esupply \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003ewith \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003epositive \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eand \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003enegative \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eoutput \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003ecables \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eor \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003ea \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eplug \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003ein \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eDC \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003epower \u003c\/span\u003e\u003cspan class=\"BZ_Pyq_fadeIn\"\u003esupply.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003e\n\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eA compatible plug in power supply can be purchased from the BLOCKsignalling website \u003ca href=\"https:\/\/blocksignalling.co.uk\/products\/psu2\" title=\"PSU2\"\u003ehere\u003c\/a\u003e.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS2A_Wiring.png?v=1773768516\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eSpeed and Delay Time Adjustments\u003c\/h3\u003e\n\u003cp\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS2A_Dials.png?v=1773687049\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1677\" data-start=\"1532\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1677\" data-start=\"1532\"\u003e\u003ca rel=\"noopener\" title=\"SS2A\" href=\"https:\/\/drive.google.com\/file\/d\/10uSB9Cvxsm_n8q8kEwOQR-p93OsOHTCf\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56826267664729,"sku":null,"price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS2A_Image_1_bb385edd-9f61-453d-b150-84a9f028ac45.jpg?v=1779369246"},{"product_id":"rev2","title":"REV2 Autoreverser (DC \u0026 DCC)","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003cstrong\u003eBLOCKsignalling REV2\u003c\/strong\u003e is an advanced automatic polarity switching module designed for DC, DCC, and Hornby HM7000 model railway layouts. It automatically manages track polarity in reversing loops and complex track arrangements, helping to prevent short circuits while ensuring smooth and uninterrupted train operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUsing infra-red train detection sensors, the REV2 detects approaching locomotives and automatically switches track polarity before a train reaches a conflicting section of track. This allows trains to pass seamlessly through reversing loops and other polarity-sensitive sections without manual intervention.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIn addition to polarity correction, the REV2 can also operate solenoid point motors, making it ideal for fully automated reversing loop operation. The module can control both points and track polarity together, allowing trains to reverse direction and re-join the main line smoothly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe REV2 supports a wide range of layout configurations, including single reversing loops, double loops, and central reversing sections, making it suitable for both simple and advanced layouts.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-end=\"827\" data-start=\"824\"\u003e\n\u003ch3 data-end=\"844\" data-start=\"829\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eAutomatic track polarity switching for reversing loops and complex layouts.\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eCompatible with DC, DCC, and Hornby HM7000 systems.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eInfra-red train detection for reliable automatic operation.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eOptional automatic control of solenoid point motors.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eSuitable for single loops, double loops, and central reversing sections.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eSeamless operation with DCC locomotives during polarity changes.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eSupports automated train routing without manual switching.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eLED status indicators for operation and troubleshooting.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003ePush-button inputs for manual point and polarity control.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eBuilt-in relay protection and intelligent sensor timing.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eCompatible with additional external LEDs and sensors.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1164\" data-start=\"846\"\u003eSuitable for OO, HO, TT120, and similar model railway scales.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1169\" data-start=\"1166\"\u003e\n\u003ch3 data-end=\"1199\" data-start=\"1171\"\u003eCompatibility Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eCompatible with DC, DCC, and Hornby HM7000 layouts.\u003c\/li\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eSupports operation using either 15V DC or DCC track power.\u003c\/li\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eDesigned for TT120, OO, HO, and similar layouts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1169\" data-start=\"1166\"\u003e\n\u003ch3 data-end=\"1199\" data-start=\"1171\"\u003eElectrical Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eDesigned for use with a regulated 12V DC power supply.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eCan also operate from a 15V DC HM7000 track supply where applicable.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eRecommended power supply rating: 1A to 2A.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eTypical module current consumption: 0.5A.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1294\" data-start=\"1201\"\u003eIncorrect power supply polarity will not damage the module.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1169\" data-start=\"1166\"\u003e\n\u003ch3 data-end=\"1199\" data-start=\"1171\"\u003eLayout Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle reversing loop automation.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDouble loop automatic polarity control.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCentral reversing loop operation.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAutomatic point switching for loop entry and exit.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully automated DC and DCC polarity management.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1169\" data-start=\"1166\"\u003e\n\u003ch3 data-end=\"1199\" data-start=\"1171\"\u003eSingle Loop Operation 1\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/1.jpg?v=1779968438\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1169\" data-start=\"1166\"\u003e\n\u003ch3 data-end=\"1199\" data-start=\"1171\"\u003eCentral Reversing Loop (Bi-Directional)\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/2.jpg?v=1779968450\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1169\" data-start=\"1166\"\u003e\n\u003ch3 data-end=\"1199\" data-start=\"1171\"\u003eSensor Installation\u003c\/h3\u003e\n\u003cp\u003eThe supplied infra-red sensors can be installed below the track bed or alongside the track. The sensors detect passing trains and automatically trigger point switching and polarity correction as required.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/3.jpg?v=1779968285\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/4.jpg?v=1779968285\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1299\" data-start=\"1296\"\u003e\n\u003ch3 data-end=\"1327\" data-start=\"1301\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1475\" data-start=\"1329\"\u003eFor detailed information on installation, wiring connections, sensor setup, troubleshooting, and additional layout configurations including reversing loops and advanced track arrangements, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1475\" data-start=\"1329\"\u003e\u003ca rel=\"noopener\" title=\"REV2\" href=\"https:\/\/drive.google.com\/file\/d\/1aCZyRfV8PSKJ-W1u0qglcxvGnkdVuDqF\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56826308854105,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/ASP1A_Image_Sensor1_9176b876-2b6b-46ae-9b77-a2daa037b95b.jpg?v=1780595050"},{"product_id":"ppi4-k","title":"PPI4-KATO Points Position Indicator","description":"\u003cp data-start=\"162\" data-end=\"344\"\u003eThis version of the \u003cstrong data-start=\"182\" data-end=\"217\"\u003ePoints Position Indicator (PPI)\u003c\/strong\u003e is designed for systems where the direction of the points is switched by reversing the polarity of the feed to the motor coil.\u003c\/p\u003e\n\u003cp data-start=\"346\" data-end=\"613\"\u003eThe PPI monitors the brief switching pulses applied to the points motor coils and displays the most recent operation using coloured LEDs. These LEDs can be mounted on a route mimic or control panel to provide a clear and reliable visual indication of point positions.\u003c\/p\u003e\n\u003chr data-start=\"615\" data-end=\"618\"\u003e\n\u003ch3 data-start=\"620\" data-end=\"635\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"637\" data-end=\"1171\"\u003eMonitors the brief operating voltage applied to points motor coils when they are switched by polarity reversal.\u003c\/li\u003e\n\u003cli data-start=\"637\" data-end=\"1171\"\u003eLights the corresponding LED on a control panel to show the last operation of each set of points.\u003c\/li\u003e\n\u003cli data-start=\"637\" data-end=\"1171\"\u003eSupports monitoring of up to 8 sets of points.\u003c\/li\u003e\n\u003cli data-start=\"637\" data-end=\"1171\"\u003eLED brightness is adjustable to suit different lighting conditions.\u003c\/li\u003e\n\u003cli data-start=\"637\" data-end=\"1171\"\u003eNo resistors are required, simplifying wiring and installation.\u003c\/li\u003e\n\u003cli data-start=\"637\" data-end=\"1171\"\u003eOpto-isolated inputs accept voltages from +5V to +60V.\u003c\/li\u003e\n\u003cli data-start=\"637\" data-end=\"1171\"\u003eAll settings are automatically saved to memory when the power is switched off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1173\" data-end=\"1176\"\u003e\n\u003ch3 data-start=\"1178\" data-end=\"1206\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1208\" data-end=\"1239\"\u003eRequires a 12V DC power supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1241\" data-end=\"1244\"\u003e\n\u003ch3 data-start=\"1246\" data-end=\"1272\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"1274\" data-end=\"1420\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"1274\" data-end=\"1420\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1WQ6eZvHb8_SqM04zCOsTPFLjMoSzCxW1\/view?usp=sharing\" target=\"_blank\" title=\"PPI4K\" rel=\"noopener\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56826348339545,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PPIK_03f80581-725e-4121-8801-fab6cf16538a.png?v=1777335659"},{"product_id":"ppi4","title":"PPI4-DC Points Position Indicator","description":"\u003cp data-start=\"164\" data-end=\"495\"\u003eThe \u003cstrong\u003eBLOCKsignalling PPI4\u003c\/strong\u003e is a Points Position Indicator designed to monitor the switching voltage applied to points motors and display their last operated position using coloured LEDs. It provides a clear and reliable visual indication of route settings on control panels and mimic boards without interfering with normal operation.\u003c\/p\u003e\n\u003cp data-start=\"497\" data-end=\"757\"\u003eWhen a set of points is operated, the module detects the brief voltage applied to the motor coil and updates the corresponding LED output. The selected route remains displayed until the points are switched again, with all states automatically stored in memory.\u003c\/p\u003e\n\u003cp data-start=\"759\" data-end=\"1002\"\u003eThe PPI4 supports monitoring of up to eight sets of points and includes built-in diagnostic LEDs to assist with setup and troubleshooting. LED brightness can be adjusted directly on the module to suit different layouts and lighting conditions.\u003c\/p\u003e\n\u003chr data-end=\"678\" data-start=\"675\"\u003e\n\u003ch3 data-end=\"695\" data-start=\"680\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eMonitors the brief switching voltage across points motors to detect operation.\u003cbr data-start=\"1097\" data-end=\"1100\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eDisplays the last operated position using LEDs on a control panel or mimic.\u003cbr data-start=\"1175\" data-end=\"1178\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eSupports up to 8 sets of points using 16 input channels.\u003cbr data-start=\"1234\" data-end=\"1237\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eAdjustable LED brightness for different environments.\u003cbr data-start=\"1290\" data-end=\"1293\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eAutomatically saves all states to memory when power is removed.\u003cbr data-start=\"1356\" data-end=\"1359\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eBuilt-in diagnostic LEDs for input and output status.\u003cbr data-start=\"1412\" data-end=\"1415\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eOpto-isolated inputs accept voltages from +5V to +25V.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1211\" data-start=\"1208\"\u003e\n\u003ch3 data-end=\"1241\" data-start=\"1213\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1274\" data-start=\"1243\"\u003e12V DC regulated power supply required.\u003cbr data-start=\"1538\" data-end=\"1541\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1274\" data-start=\"1243\"\u003eTypical current consumption: approximately 50mA.\u003cbr data-start=\"1589\" data-end=\"1592\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1274\" data-start=\"1243\"\u003eRecommended supply rating: 0.25A to 1A.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1499\" data-end=\"1502\"\u003e\n\u003ch3 data-start=\"1504\" data-end=\"1530\"\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/ppi1_3de51863-2e50-4051-959f-051d9127ea75.png?v=1776357589\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1279\" data-start=\"1276\"\u003e\n\u003ch3 data-end=\"1307\" data-start=\"1281\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1454\" data-start=\"1309\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1454\" data-start=\"1309\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1t_b-w5tl0T0sU7gvp58Au60SzOzamCzE\/view?usp=drive_link\" title=\"PPI4\" rel=\"noopener\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56826360103257,"sku":null,"price":34.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PPI4_Image_1_f241ec92-3c59-45c1-a41a-549648adc627.jpg?v=1779214244"},{"product_id":"psu2","title":"PSU2 Plug Top Power Supply 12V DC","description":"\u003cp data-end=\"287\" data-start=\"0\"\u003eThe BLOCKsignalling PSU2 is a plug-in power supply that delivers a regulated and stable 12V DC output with a current capacity of up to 1A. It is designed to reliably power electronic modules used on model railway layouts, including a range of BLOCKsignalling modules.\u003c\/p\u003e\n\u003cp data-end=\"538\" data-start=\"289\"\u003eUnlike some power supplies, the PSU2 does not require a minimum load to operate correctly. It maintains a consistent 12V DC output even when no load is connected, ensuring dependable performance and protecting connected electronics from instability.\u003c\/p\u003e\n\u003cp data-end=\"766\" data-start=\"540\"\u003eWith a universal input range of 90 to 264V AC and a fixed UK Type G plug, the PSU2 is simple to use and suitable for a wide range of environments. Its compact plug-top design makes it ideal for both hobby and professional use.\u003c\/p\u003e\n\u003chr data-start=\"645\" data-end=\"648\"\u003e\n\u003ch3 data-start=\"650\" data-end=\"678\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"884\" data-start=\"680\"\u003eProvides a regulated 12V DC output at up to 1A.\u003cbr data-end=\"1024\" data-start=\"1021\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"884\" data-start=\"680\"\u003eUniversal input voltage range of 90V AC to 264V AC.\u003cbr data-end=\"1078\" data-start=\"1075\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"884\" data-start=\"680\"\u003eFitted with a 5.5mm \/ 2.1mm DC jack with centre pin positive.\u003cbr data-is-only-node=\"\" data-end=\"1142\" data-start=\"1139\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"884\" data-start=\"680\"\u003eSupplied with a 1500mm lead.\u003cbr data-end=\"1173\" data-start=\"1170\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"884\" data-start=\"680\"\u003eSingle fixed output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"645\" data-end=\"648\"\u003e\n\u003ch3 data-start=\"650\" data-end=\"678\"\u003eCompatible BLOCKsignalling Modules\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blocksignalling.co.uk\/products\/ss2a\" title=\"SS2A\" rel=\"noopener\" target=\"_blank\"\u003eSS2A\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blocksignalling.co.uk\/products\/sdcc1\" title=\"SDCC1\" rel=\"noopener\" target=\"_blank\"\u003eSDCC1\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blocksignalling.co.uk\/products\/sdcc1-hp\" title=\"SDCCHP\" rel=\"noopener\" target=\"_blank\"\u003eSDCC1-HP\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blocksignalling.co.uk\/products\/sas2-br\" title=\"SAS2BR\" rel=\"noopener\" target=\"_blank\"\u003eSAS2-BR\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blocksignalling.co.uk\/products\/psu4-module\" title=\"PSU4\" rel=\"noopener\" target=\"_blank\"\u003ePSU4\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"886\" data-end=\"889\"\u003e\n\u003ch3 data-start=\"891\" data-end=\"916\"\u003eStandards \u0026amp; Compliance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"918\" data-end=\"999\"\u003eComplies with BS1363 (UK plug type).\u003cbr data-start=\"1258\" data-end=\"1261\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"918\" data-end=\"999\"\u003eMeets EU Efficiency Class VI requirements.\u003cbr data-start=\"1303\" data-end=\"1306\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"918\" data-end=\"999\"\u003eEN 62368-1 safety approved.\u003cbr data-start=\"1333\" data-end=\"1336\" data-is-only-node=\"\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"918\" data-end=\"999\"\u003eIncludes over-voltage, over-current, and short circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56826478788953,"sku":null,"price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PSU_80d91633-f564-4f53-82dd-7dd43771420a.png?v=1777333569"},{"product_id":"cdu2c-fc","title":"CDU2C-FC Fast Charge Capacitor Discharge Unit","description":"\u003cp\u003eThe \u003cstrong\u003eBLOCKsignalling CDU2C-FC\u003c\/strong\u003e is a fast charging capacitor discharge unit designed for reliable and safe operation of points motors on medium to large model railway layouts.\u003c\/p\u003e\n\u003cp\u003eIt stores electrical energy in internal capacitors and releases it as a short, high current pulse when a switch is operated, ensuring strong and consistent point switching while protecting both motors and control switches.\u003c\/p\u003e\n\u003cp\u003eThis provides a sharp, positive movement of the points without allowing sustained current through the switch contacts, helping to prevent overheating and electrical arcing.\u003c\/p\u003e\n\u003cp\u003eThe fast charging design allows the unit to recharge in a fraction of a second, making it ideal for layouts where multiple points may be operated in quick succession.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProvides a high current pulse for reliable points motor operation.\u003c\/li\u003e\n\u003cli\u003eProtects points motors from burn-out by limiting sustained current.\u003c\/li\u003e\n\u003cli\u003ePrevents switch contact damage by eliminating electrical arcing.\u003c\/li\u003e\n\u003cli\u003eReduces voltage fluctuations across the rest of the layout.\u003c\/li\u003e\n\u003cli\u003eFast charging for rapid recovery between operations.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBuilt-in indicator LEDs.\u003c\/li\u003e\n\u003cli\u003eSuitable for operating multiple points, even over longer distances.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eElectrical Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAccepts 12V AC to 24V AC or 15V DC to 35V DC input.\u003c\/li\u003e\n\u003cli\u003eRecommended supply rating: 1A.\u003c\/li\u003e\n\u003cli\u003eCompatible with controller auxiliary outputs or suitable DC power supplies.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS2A_Wiring_10ffa72d-e8fd-4643-8600-6a8496b93f88.png?v=1776955580\"\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWiring Multiple Points\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS2A_Wiring_1_15bc9c58-da26-4bba-afeb-adddc922d3f3.png?v=1776955581\"\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for all common solenoid points motors (e.g. Hornby, Peco).\u003c\/li\u003e\n\u003cli\u003eDesigned for medium to large layouts where multiple points may be used.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"CDU2C\" href=\"https:\/\/drive.google.com\/file\/d\/1dTz6OcwaOWfFueNjfRYOGV_-InSIuGMN\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56860613312857,"sku":null,"price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/CDU2C_Image_1.jpg?v=1781706043"},{"product_id":"cdu1e","title":"CDU1e Fast Charge Capacitor Discharge Unit","description":"\u003cp data-start=\"178\" data-end=\"498\"\u003eThe \u003cstrong data-start=\"182\" data-end=\"232\"\u003eBLOCKsignalling Capacitor Discharge Unit (CDU)\u003c\/strong\u003e stores electrical energy in a capacitor and releases it as a short, high-current pulse when a switch is operated. This burst of energy provides reliable operation of points while drawing far less continuous current than a transformer would otherwise need to supply.\u003c\/p\u003e\n\u003cp data-start=\"500\" data-end=\"765\"\u003eThe CDU also protects points motors from burn-out by limiting any sustained current caused by faults in the switching circuit, while helping to maintain stable voltage levels across the rest of the layout. This single-capacitor version is ideal for smaller layouts.\u003c\/p\u003e\n\u003chr data-start=\"767\" data-end=\"770\"\u003e\n\u003ch3 data-start=\"772\" data-end=\"787\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"789\" data-end=\"1132\"\u003eProvides a high-current pulse to reliably operate points motors.\u003c\/li\u003e\n\u003cli data-start=\"789\" data-end=\"1132\"\u003eHelps prevent points motor burn-out by limiting subsequent current flow.\u003c\/li\u003e\n\u003cli data-start=\"789\" data-end=\"1132\"\u003eReduces voltage fluctuations across the rest of the layout.\u003c\/li\u003e\n\u003cli data-start=\"789\" data-end=\"1132\"\u003eFast capacitor charging allows for quicker recovery between operations.\u003c\/li\u003e\n\u003cli data-start=\"789\" data-end=\"1132\"\u003eBuilt-in LED indicators display the operating status of the unit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1134\" data-end=\"1137\"\u003e\n\u003ch3 data-start=\"1139\" data-end=\"1178\"\u003eElectrical \u0026amp; Application Information\u003c\/h3\u003e\n\u003cp data-start=\"1180\" data-end=\"1266\"\u003eThis unit is fitted with a single capacitor and is suitable for smaller-sized layouts.\u003c\/p\u003e\n\u003chr data-start=\"1268\" data-end=\"1271\"\u003e\n\u003ch3 data-start=\"1273\" data-end=\"1299\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"1301\" data-end=\"1445\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"1301\" data-end=\"1445\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/19JLM7DxgzYtO1lvQDjuopTX5fa4eqbOk\/view?usp=sharing\" title=\"CDU1E\" rel=\"noopener\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56860629762393,"sku":null,"price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/CDU1.png?v=1777332877"},{"product_id":"cdu4f","title":"CDU4F Fast Charging Capacitor Discharge Unit","description":"\u003cp data-start=\"50\" data-end=\"378\"\u003eThe \u003cstrong\u003eCDU4F Fast Charging Capacitor Discharge Unit\u003c\/strong\u003e delivers a powerful, short-duration current pulse to ensure positive and reliable point motor operation. By storing energy in internal capacitors and releasing it in a controlled burst, it provides strong switching performance without placing excessive load on your power supply.\u003c\/p\u003e\n\u003cp data-start=\"380\" data-end=\"623\"\u003eAfter the initial surge, the CDU limits sustained current to protect point motors from burn-out caused by wiring faults or prolonged switch operation. It also prevents voltage drop across the rest of the layout while points are being operated.\u003c\/p\u003e\n\u003chr data-end=\"665\" data-start=\"662\"\u003e\n\u003ch3 data-end=\"694\" data-start=\"667\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDelivers a high current pulse for positive point motor operation\u003cbr data-start=\"845\" data-end=\"848\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eProtects point motors from burn-out caused by wiring faults or prolonged switching\u003cbr data-start=\"932\" data-end=\"935\"\u003e\n\u003c\/li\u003e\n\u003cli\u003ePrevents voltage fluctuations across the layout during operation\u003cbr data-start=\"1001\" data-end=\"1004\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eFast charging for rapid recovery between operations\u003cbr data-start=\"1057\" data-end=\"1060\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eBuilt-in LED indicators for charge status monitoring\u003cbr data-start=\"1114\" data-end=\"1117\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eReady light fitted as standard, with connection for remote panel LED\u003cbr data-start=\"1187\" data-end=\"1190\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eAvailable in storage capacities suitable for layouts of all sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"988\" data-start=\"985\"\u003e\n\u003ch3 data-end=\"1015\" data-start=\"990\"\u003ePower Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUp to 35V DC or 24V AC input\u003cbr data-start=\"1033\" data-end=\"1036\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eCommonly used with 16V AC controller auxiliary outputs\u003cbr data-start=\"1092\" data-end=\"1095\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eMinimum recommended supply: 12V AC or 15V DC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"988\" data-start=\"985\"\u003e\n\u003ch3 data-end=\"1299\" data-start=\"1273\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1445\" data-start=\"1301\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1445\" data-start=\"1301\"\u003e\u003ca title=\"CDU4F\" href=\"https:\/\/drive.google.com\/file\/d\/1bngowK7JPPuBlO4N79ggLMHQhTSQOv0F\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56860636283225,"sku":null,"price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/CDU4_49f45885-d9d5-4054-8fcd-2947f97325ce.png?v=1777332676"},{"product_id":"ss1","title":"SS1 DC Simple Shuttle","description":"\u003cp data-start=\"178\" data-end=\"454\"\u003eThe \u003cstrong\u003eBLOCKsignalling SS1 Simple Shuttle\u003c\/strong\u003e is designed to automatically operate a DC model train running backwards and forwards along a single length of track. It provides an easy way to add movement and interest to any model railway layout with minimal setup.\u003c\/p\u003e\n\u003cp data-start=\"456\" data-end=\"800\"\u003eAt each end of the line, an insulated rail gap stops the train by cutting power to the locomotive. The module then automatically reverses the track polarity, allowing the train to depart in the opposite direction. The delay between direction changes can be adjusted from one second up to ten minutes using a simple on board screwdriver control.\u003c\/p\u003e\n\u003cp data-start=\"802\" data-end=\"934\"\u003eThe SS1 is microprocessor controlled for accurate and reliable operation, while maintaining simple wiring and straightforward setup.\u003c\/p\u003e\n\u003chr data-end=\"744\" data-start=\"741\"\u003e\n\u003ch3 data-end=\"761\" data-start=\"746\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatically operates a DC train back and forth along a single track section.\u003cbr data-start=\"1029\" data-end=\"1032\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdjustable waiting time at each end of the line using a simple screwdriver control.\u003cbr data-start=\"1115\" data-end=\"1118\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eLED indicators on the module show direction of travel and output status.\u003cbr data-start=\"1190\" data-end=\"1193\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eMicroprocessor controlled for accurate and consistent timing.\u003cbr data-start=\"1254\" data-end=\"1257\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eSimple wiring and easy to use operation.\u003cbr data-start=\"1297\" data-end=\"1300\"\u003e\n\u003c\/li\u003e\n\u003cli\u003ePass through operation when unpowered, allowing manual train control.\u003cbr data-start=\"1369\" data-end=\"1372\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for OO, HO, and smaller locomotives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1129\" data-start=\"1126\"\u003e\n\u003ch3 data-end=\"1157\" data-start=\"1131\"\u003eElectrical Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1190\" data-start=\"1159\"\u003eRequires a 12V DC power supply.\u003cbr data-start=\"1476\" data-end=\"1479\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1190\" data-start=\"1159\"\u003eTypical module current consumption: 50mA.\u003cbr data-start=\"1520\" data-end=\"1523\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1190\" data-start=\"1159\"\u003eMaximum recommended track current: 1A.\u003cbr data-start=\"1561\" data-end=\"1564\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1190\" data-start=\"1159\"\u003eReverse polarity protection on power input.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS1_Wiring.png?v=1773769836\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eTime Delay Adjustment\u003c\/h3\u003e\n\u003cp\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS1_Dials.png?v=1773865736\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1195\" data-start=\"1192\"\u003e\n\u003ch3 data-end=\"1223\" data-start=\"1197\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1371\" data-start=\"1225\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1371\" data-start=\"1225\"\u003e\u003ca rel=\"noopener\" title=\"SS1\" href=\"https:\/\/drive.google.com\/file\/d\/1Sal2YPeGu91K410UtmV-XPKgIAr_I6pv\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56860640903513,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SS1_Image_1_70626e77-0915-4289-86b0-cc439b6eee69.jpg?v=1779369185"},{"product_id":"ppi4-5mm-led","title":"PPI4-DC Points Position Indicator + Wired 5mm LEDs Red \u0026 Green","description":"\u003cp data-end=\"455\" data-start=\"85\"\u003eThe \u003cstrong\u003eBLOCKsignalling PPI4\u003c\/strong\u003e is a Points Position Indicator designed to monitor the switching voltage applied to points motors and display the last operated position using coloured LEDs. This version is supplied with 16 pre-wired 5mm LEDs (8 red and 8 green), making it quick and easy to install on control panels and mimic boards without the need for additional components.\u003c\/p\u003e\n\u003cp data-end=\"735\" data-start=\"457\"\u003eWhen a set of points is operated, the module detects the brief switching voltage applied to the points motor coils and updates the corresponding LED output. The selected route remains displayed until the points are switched again, with all states automatically stored in memory.\u003c\/p\u003e\n\u003cp data-end=\"980\" data-start=\"737\"\u003eThe PPI4 supports monitoring of up to eight sets of points and includes built-in diagnostic LEDs to assist with setup and troubleshooting. LED brightness can be adjusted directly on the module to suit different layouts and lighting conditions.\u003c\/p\u003e\n\u003chr data-start=\"675\" data-end=\"678\"\u003e\n\u003ch3 data-start=\"680\" data-end=\"695\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eMonitors the brief switching voltage across points motors to detect operation.\u003cbr data-end=\"1078\" data-start=\"1075\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eDisplays the last operated position using LEDs on a control panel or mimic.\u003cbr data-end=\"1156\" data-start=\"1153\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eSupports up to 8 sets of points (16 input channels).\u003cbr data-end=\"1211\" data-start=\"1208\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eAdjustable LED brightness for different environments.\u003cbr data-end=\"1267\" data-start=\"1264\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eAutomatically saves all states to memory when power is removed.\u003cbr data-end=\"1333\" data-start=\"1330\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eBuilt-in diagnostic LEDs for input and output status.\u003cbr data-end=\"1389\" data-start=\"1386\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eOpto-isolated inputs accept voltages from +5V to +25V.\u003cbr data-end=\"1446\" data-start=\"1443\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eSupplied with 8 red and 8 green pre-wired 5mm LEDs.\u003cbr data-end=\"1500\" data-start=\"1497\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"697\" data-end=\"1206\"\u003eNo additional resistors required, simplifying wiring and installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1208\" data-end=\"1211\"\u003e\n\u003ch3 data-start=\"1213\" data-end=\"1241\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1243\" data-end=\"1274\"\u003e12V DC regulated power supply required.\u003cbr data-end=\"1644\" data-start=\"1641\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1243\" data-end=\"1274\"\u003eTypical current consumption: approximately 50mA.\u003cbr data-end=\"1695\" data-start=\"1692\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1243\" data-end=\"1274\"\u003eRecommended supply rating: 0.25A to 1A.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1499\" data-end=\"1502\"\u003e\n\u003ch3 data-start=\"1504\" data-end=\"1530\"\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/ppi1_3de51863-2e50-4051-959f-051d9127ea75.png?v=1776357589\"\u003e\u003c\/p\u003e\n\u003chr data-start=\"1276\" data-end=\"1279\"\u003e\n\u003ch3 data-start=\"1281\" data-end=\"1307\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"1309\" data-end=\"1454\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"1309\" data-end=\"1454\"\u003e\u003ca rel=\"noopener\" title=\"PPI4\" href=\"https:\/\/drive.google.com\/file\/d\/1t_b-w5tl0T0sU7gvp58Au60SzOzamCzE\/view?usp=drive_link\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56860725084505,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PPI3LED_b25450bc-7d80-4dd7-87a8-4aa00b6a1ed9.png?v=1777331772"},{"product_id":"ppi4-dualcolour-led","title":"PPI4-DC Points Position Indicator + Dual Colour LEDs Red \u0026 Green","description":"\u003cp data-end=\"503\" data-start=\"106\"\u003eThe \u003cstrong\u003eBLOCKsignalling PPI4\u003c\/strong\u003e is a Points Position Indicator designed to monitor the switching voltage applied to points motors and display the last operated position using coloured LEDs. This version is supplied with 8 pre-wired dual colour red\/green LEDs, providing a clear and reliable visual indication of route settings on control panels and mimic boards without interfering with normal operation.\u003c\/p\u003e\n\u003cp data-end=\"783\" data-start=\"505\"\u003eWhen a set of points is operated, the module detects the brief switching voltage applied to the points motor coils and updates the corresponding LED output. The selected route remains displayed until the points are switched again, with all states automatically stored in memory.\u003c\/p\u003e\n\u003cp data-end=\"1028\" data-start=\"785\"\u003eThe PPI4 supports monitoring of up to eight sets of points and includes built-in diagnostic LEDs to assist with setup and troubleshooting. LED brightness can be adjusted directly on the module to suit different layouts and lighting conditions.\u003c\/p\u003e\n\u003chr data-start=\"675\" data-end=\"678\"\u003e\n\u003ch3 data-start=\"680\" data-end=\"695\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eMonitors the brief switching voltage across points motors to detect operation.\u003cbr data-start=\"1098\" data-end=\"1101\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eDisplays the last operated position using LEDs on a control panel or mimic.\u003cbr data-start=\"1176\" data-end=\"1179\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eSupports up to 8 sets of points (16 input channels).\u003cbr data-start=\"1231\" data-end=\"1234\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eAdjustable LED brightness for different environments.\u003cbr data-start=\"1287\" data-end=\"1290\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eAutomatically saves all states to memory when power is removed.\u003cbr data-start=\"1353\" data-end=\"1356\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eBuilt-in diagnostic LEDs for input and output status.\u003cbr data-start=\"1409\" data-end=\"1412\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eOpto-isolated inputs accept voltages from +5V to +25V.\u003cbr data-start=\"1466\" data-end=\"1469\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eSupplied with 8 pre-wired dual colour red\/green LEDs.\u003cbr data-start=\"1522\" data-end=\"1525\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1125\" data-start=\"1030\"\u003eNo additional resistors required, simplifying wiring and installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1208\" data-end=\"1211\"\u003e\n\u003ch3 data-start=\"1213\" data-end=\"1241\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1243\" data-end=\"1274\"\u003e12V DC regulated power supply required.\u003cbr data-end=\"1668\" data-start=\"1665\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1243\" data-end=\"1274\"\u003eTypical current consumption: approximately 50mA.\u003cbr data-end=\"1719\" data-start=\"1716\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1243\" data-end=\"1274\"\u003eRecommended supply rating: 0.25A to 1A.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1499\" data-end=\"1502\"\u003e\n\u003ch3 data-start=\"1504\" data-end=\"1530\"\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/ppi1_3de51863-2e50-4051-959f-051d9127ea75.png?v=1776357589\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eWiring Dual Colour LEDs\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/Dual.png?v=1776362106\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-start=\"1276\" data-end=\"1279\"\u003e\n\u003ch3 data-start=\"1281\" data-end=\"1307\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"1309\" data-end=\"1454\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"1309\" data-end=\"1454\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1t_b-w5tl0T0sU7gvp58Au60SzOzamCzE\/view?usp=drive_link\" title=\"PPI4\" rel=\"noopener\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56860725903705,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PPI4BILED_6bdc23b1-8517-4e3d-819e-223e7bb7a6c1.png?v=1777331806"},{"product_id":"rev7k-4a","title":"REV7K-4A 15V DC High Power Reverse Loop Module (HM7000 TT:120 Compatible)","description":"\u003cp data-end=\"454\" data-start=\"183\"\u003eThe \u003cstrong data-end=\"228\" data-start=\"187\"\u003eBLOCKsignalling REV7K-4A Autoreverser\u003c\/strong\u003e is designed for layouts powered by 15V DC, such as those using the Hornby™ HM7000 system. It provides a reliable solution for layouts that include track arrangements where rail polarity must be reversed automatically.\u003c\/p\u003e\n\u003cp data-end=\"771\" data-start=\"456\"\u003eThe autoreverser enables the use of reversing loops, turntables, wye layouts, and figure-of-eight track plans. When a train enters a section of track with a polarity mismatch that would normally cause a short circuit, the unit instantly corrects the polarity, preventing a short and avoiding shutdown of the layout.\u003c\/p\u003e\n\u003chr data-end=\"776\" data-start=\"773\"\u003e\n\u003ch3 data-end=\"793\" data-start=\"778\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1206\" data-start=\"795\"\u003eAutomatically detects polarity mismatches and reverses rail polarity to prevent short circuits.\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"795\"\u003eEnables the use of reversing loops, turntables, wye layouts, and figure-of-eight layouts.\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"795\"\u003eHigh-power design suitable for layouts with higher current demands.\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"795\"\u003eRated for use with 15V DC power supplies at currents typically from 1A to 6A.\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"795\"\u003eProvides reliable operation on DC-powered layouts without interruption.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1211\" data-start=\"1208\"\u003e\n\u003ch3 data-end=\"1241\" data-start=\"1213\"\u003eCompatibility Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1468\" data-start=\"1243\"\u003eDesigned for use with 15V DC systems, including Hornby™ HM7000 when operated in DC mode.\u003c\/li\u003e\n\u003cli data-end=\"1468\" data-start=\"1243\"\u003eNot suitable for use with Hornby™ HM7000 when the rails are fed with DCC; for DCC operation, use the \u003ca rel=\"noopener\" title=\"REV1\" href=\"https:\/\/blocksignalling.co.uk\/products\/rev1\" target=\"_blank\"\u003eBLOCKsignalling REV1\u003c\/a\u003e instead.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1473\" data-start=\"1470\"\u003e\n\u003ch3 data-end=\"1501\" data-start=\"1475\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1649\" data-start=\"1503\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1649\" data-start=\"1503\"\u003e\u003ca rel=\"noopener\" title=\"REV7K4A\" href=\"https:\/\/drive.google.com\/file\/d\/1PMZ3MtRZ1JF2leL1m8oecsaLfj94TBZh\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56866378219865,"sku":null,"price":34.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/REV7K4A_Image_1_19bc818c-e4fe-4086-85e4-869c72228fa8.jpg?v=1780154133"},{"product_id":"ppi4-3mm-led","title":"PPI4-DC Points Position Indicator + Wired 3mm LEDs Red \u0026 Green","description":"\u003cp data-start=\"85\" data-end=\"455\"\u003eThe \u003cstrong\u003eBLOCKsignalling PPI4\u003c\/strong\u003e is a Points Position Indicator designed to monitor the switching voltage applied to points motors and display the last operated position using coloured LEDs. This version is supplied with 16 pre-wired 3mm LEDs (8 red and 8 green), making it quick and easy to install on control panels and mimic boards without the need for additional components.\u003c\/p\u003e\n\u003cp data-start=\"457\" data-end=\"735\"\u003eWhen a set of points is operated, the module detects the brief switching voltage applied to the points motor coils and updates the corresponding LED output. The selected route remains displayed until the points are switched again, with all states automatically stored in memory.\u003c\/p\u003e\n\u003cp data-start=\"737\" data-end=\"980\"\u003eThe PPI4 supports monitoring of up to eight sets of points and includes built-in diagnostic LEDs to assist with setup and troubleshooting. LED brightness can be adjusted directly on the module to suit different layouts and lighting conditions.\u003c\/p\u003e\n\u003chr data-end=\"678\" data-start=\"675\"\u003e\n\u003ch3 data-end=\"695\" data-start=\"680\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eMonitors the brief switching voltage across points motors to detect operation.\u003cbr data-start=\"1075\" data-end=\"1078\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eDisplays the last operated position using LEDs on a control panel or mimic.\u003cbr data-start=\"1153\" data-end=\"1156\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eSupports up to 8 sets of points (16 input channels).\u003cbr data-start=\"1208\" data-end=\"1211\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eAdjustable LED brightness for different environments.\u003cbr data-start=\"1264\" data-end=\"1267\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eAutomatically saves all states to memory when power is removed.\u003cbr data-start=\"1330\" data-end=\"1333\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eBuilt-in diagnostic LEDs for input and output status.\u003cbr data-start=\"1386\" data-end=\"1389\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eOpto-isolated inputs accept voltages from +5V to +25V.\u003cbr data-start=\"1443\" data-end=\"1446\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eSupplied with 8 red and 8 green pre-wired 3mm LEDs.\u003cbr data-start=\"1497\" data-end=\"1500\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1206\" data-start=\"697\"\u003eNo additional resistors required, simplifying wiring and installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1211\" data-start=\"1208\"\u003e\n\u003ch3 data-end=\"1241\" data-start=\"1213\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1274\" data-start=\"1243\"\u003e12V DC regulated power supply required.\u003cbr data-start=\"1641\" data-end=\"1644\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1274\" data-start=\"1243\"\u003eTypical current consumption: approximately 50mA.\u003cbr data-start=\"1692\" data-end=\"1695\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1274\" data-start=\"1243\"\u003eRecommended supply rating: 0.25A to 1A.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/ppi1_3de51863-2e50-4051-959f-051d9127ea75.png?v=1776357589\" alt=\"\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1279\" data-start=\"1276\"\u003e\n\u003ch3 data-end=\"1307\" data-start=\"1281\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1454\" data-start=\"1309\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1454\" data-start=\"1309\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1t_b-w5tl0T0sU7gvp58Au60SzOzamCzE\/view?usp=drive_link\" target=\"_blank\" title=\"PPI4\" rel=\"noopener\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56894416126297,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PPI3LED_15cc4307-c6e9-4668-a526-741c71d90d02.png?v=1777331732"},{"product_id":"bod4-rly","title":"BOD4-RLY Infra-Red Train Detector \u0026 Relay for Faller 161675","description":"\u003cp data-end=\"417\" data-start=\"108\"\u003eThe \u003cstrong\u003eBLOCKsignalling BOD4-RLY\u003c\/strong\u003e is a compact infra-red train detector with a built-in relay, designed to detect trains or vehicles and trigger actions on your layout. It provides a simple and reliable way to automate signals, accessories, and animations, even in hidden areas such as tunnels.\u003c\/p\u003e\n\u003cp data-end=\"766\" data-start=\"419\"\u003eWhen a train passes over the infra-red sensor, the module detects it and activates the relay. Once the train clears the sensor, the relay resets, with optional delay and timing features for more realistic operation. A range of built-in programs and adjustable settings allow the behavior to be tailored to suit different layouts and applications.\u003c\/p\u003e\n\u003chr data-start=\"918\" data-end=\"921\"\u003e\n\u003ch3 data-start=\"923\" data-end=\"938\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eDetects trains and vehicles using an included infra-red sensor.\u003cbr data-end=\"849\" data-start=\"846\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eBuilt-in relay rated up to 1.5A at 24V DC for controlling accessories.\u003cbr data-end=\"922\" data-start=\"919\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eQuick and easy installation, including use in tunnels and hidden track sections.\u003cbr data-end=\"1005\" data-start=\"1002\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eMultiple built-in operating modes for different applications.\u003cbr data-end=\"1069\" data-start=\"1066\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eAdjustable delay before relay activation and reset.\u003cbr data-end=\"1123\" data-start=\"1120\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eOptional randomised timing for more realistic behaviour.\u003cbr data-end=\"1182\" data-start=\"1179\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eAbility to trigger only a proportion of detections for varied operation.\u003cbr data-end=\"1257\" data-start=\"1254\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eBuilt-in +5V output for driving LEDs, signals, or small relays.\u003cbr data-end=\"1323\" data-start=\"1320\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eAdjustable sensor sensitivity to suit different layouts.\u003cbr data-end=\"1382\" data-start=\"1379\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"940\" data-end=\"1431\"\u003eNo programming required for basic operation, with advanced configuration available if needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1433\" data-end=\"1436\"\u003e\n\u003ch3 data-start=\"1438\" data-end=\"1464\"\u003eElectrical Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1466\" data-end=\"1497\"\u003e12V DC regulated power supply required.\u003cbr data-end=\"1547\" data-start=\"1544\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1466\" data-end=\"1497\"\u003eRecommended supply rating: 0.5A to 1A.\u003cbr data-end=\"1588\" data-start=\"1585\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1466\" data-end=\"1497\"\u003eTypical current consumption: 0.25A.\u003cbr data-end=\"1626\" data-start=\"1623\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1466\" data-end=\"1497\"\u003eRelay rating: up to 1.5A at 24V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1499\" data-end=\"1502\"\u003e\n\u003ch3 data-start=\"1504\" data-end=\"1530\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"1532\" data-end=\"1677\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"1532\" data-end=\"1677\"\u003e\u003ca rel=\"noopener\" title=\"BOD4-RLY\" href=\"https:\/\/drive.google.com\/file\/d\/1A41hdZuwsJyTcAm8DouKPF-I24iSg-JO\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56936289796441,"sku":null,"price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/BOD4RLY_365bf5ef-6963-42e7-b0e9-204f064c0a59.png?v=1777332509"},{"product_id":"sas2-br","title":"SAS2-BR DC Shuttle with Station Stop \u0026 Acceleration","description":"\u003cp data-start=\"189\" data-end=\"528\"\u003eThe \u003cstrong\u003eBLOCKsignalling SAS2-BR\u003c\/strong\u003e is a self contained DC shuttle controller with built in throttle, designed to operate a single locomotive automatically along a defined section of track. It runs a train back and forth with realistic acceleration and deceleration, and also supports optional station stops for more varied and lifelike operation.\u003c\/p\u003e\n\u003cp data-start=\"530\" data-end=\"871\"\u003eWhen the locomotive reaches the end of the line, the module detects it entering an isolated section of track, slows it to a standstill, waits for a set period, then accelerates it away in the opposite direction. The same process repeats at the other end, allowing fully automatic shuttle operation without the need for a separate controller.\u003c\/p\u003e\n\u003cp data-start=\"873\" data-end=\"1208\"\u003eOne or more intermediate station stops can also be added. As the train enters a station section, it slows smoothly to a stop, waits for the programmed time, then departs again in the same direction. This makes the SAS2-BR ideal for branch lines, end to end shuttle services, and other layouts where realistic train movement is desired.\u003c\/p\u003e\n\u003cp data-start=\"1210\" data-end=\"1398\"\u003eThe module includes adjustable train speed and waiting time settings as standard, with additional programmable options available for acceleration, deceleration, and fixed or random delays.\u003c\/p\u003e\n\u003chr data-end=\"921\" data-start=\"918\"\u003e\n\u003ch3 data-end=\"938\" data-start=\"923\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eAutomatically operates a DC locomotive back and forth along a single track section.\u003cbr data-start=\"1498\" data-end=\"1501\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eOptional station stop function allows the train to pause at one or more intermediate stations.\u003cbr data-start=\"1595\" data-end=\"1598\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eBuilt in DC throttle removes the need for a separate speed controller.\u003cbr data-start=\"1668\" data-end=\"1671\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eSmooth acceleration and deceleration for more realistic train movement.\u003cbr data-start=\"1742\" data-end=\"1745\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eAdjustable waiting times using simple on board controls.\u003cbr data-start=\"1801\" data-end=\"1804\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eAdditional programmable settings for speed behaviour, stop durations, and fixed or random delays.\u003cbr data-start=\"1901\" data-end=\"1904\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eSuitable for OO, HO and smaller locomotives.\u003cbr data-start=\"1948\" data-end=\"1951\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eQuick and easy to connect and set up.\u003cbr data-start=\"1988\" data-end=\"1991\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1431\" data-start=\"940\"\u003eBuilt in short circuit protection for reliable operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1436\" data-start=\"1433\"\u003e\n\u003ch3 data-end=\"1464\" data-start=\"1438\"\u003eElectrical Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003e12V DC power supply required.\u003cbr data-start=\"2107\" data-end=\"2110\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003eRecommended supply rating: at least 0.5A for Z and N gauge, and 1A for OO and HO.\u003cbr data-start=\"2191\" data-end=\"2194\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003eMaximum traction current: 0.5A.\u003cbr data-start=\"2225\" data-end=\"2228\"\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003eCan be powered using either the screw terminals or a 2.1mm centre positive DC jack plug.\u003c\/li\u003e\n\u003cli data-end=\"1497\" data-start=\"1466\"\u003e\n\u003cspan class=\"BZ_Pyq_fadeIn\"\u003eA compatible plug in power supply can be purchased from the BLOCKsignalling website \u003ca href=\"https:\/\/blocksignalling.co.uk\/products\/psu2\" title=\"PSU2\"\u003ehere\u003c\/a\u003e.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eWiring Diagram\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/b1_430dfc2c-f2b7-4b48-8016-b4cfbc41ea7e.png?v=1775765940\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/b2_99dc9bfa-b92d-4f05-a6f8-2db6facdade1.png?v=1775765947\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eSpeed and Time Adjustments\u003c\/h3\u003e\n\u003cp\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/Screenshot_2026-04-09_211832.png?v=1775765949\"\u003e\u003c\/p\u003e\n\u003chr data-end=\"1502\" data-start=\"1499\"\u003e\n\u003ch3 data-end=\"1530\" data-start=\"1504\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1677\" data-start=\"1532\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1677\" data-start=\"1532\"\u003e\u003ca rel=\"noopener\" title=\"SAS2BR\" href=\"https:\/\/drive.google.com\/file\/d\/17oH1pvJNVPGz2PhCrzanPpwL05VL_aLe\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56936352252249,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SDCC1_Image_1.jpg?v=1779819779"},{"product_id":"psu4","title":"PSU4 Plug Top Power Supply 24V DC","description":"\u003cp data-start=\"183\" data-end=\"418\"\u003eThe \u003cstrong data-start=\"187\" data-end=\"211\"\u003eBLOCKsignalling PSU4\u003c\/strong\u003e is a plug-in power supply that provides a regulated and smoothed 24\u003cstrong data-start=\"277\" data-end=\"294\"\u003eV DC output\u003c\/strong\u003e with a current capacity of up to \u003cstrong data-start=\"328\" data-end=\"334\"\u003e1A\u003c\/strong\u003e. It is designed to reliably power electronic modules used on model railway layouts.\u003c\/p\u003e\n\u003cp data-start=\"420\" data-end=\"643\"\u003eUnlike some power supplies, the PSU4 does not require a minimum load to operate correctly. It maintains a stable 24V DC output even when no load is connected, ensuring that connected electronic modules function as expected.\u003c\/p\u003e\n\u003chr data-start=\"645\" data-end=\"648\"\u003e\n\u003ch3 data-start=\"650\" data-end=\"678\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"680\" data-end=\"884\"\u003eProvides a regulated 24V DC output at up to 1A.\u003cbr data-start=\"727\" data-end=\"730\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"680\" data-end=\"884\"\u003eDoes not require a minimum load to maintain output voltage.\u003cbr data-start=\"789\" data-end=\"792\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"680\" data-end=\"884\"\u003eFitted with a 5.5mm \/ 2.1mm DC jack with centre pin positive.\u003cbr data-start=\"853\" data-end=\"856\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"680\" data-end=\"884\"\u003eSupplied with a 1500mm lead.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"886\" data-end=\"889\"\u003e\n\u003ch3 data-start=\"891\" data-end=\"916\"\u003eStandards \u0026amp; Compliance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"918\" data-end=\"999\"\u003eComplies with BS1363 (UK plug type).\u003cbr data-start=\"954\" data-end=\"957\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"918\" data-end=\"999\"\u003eMeets EU Efficiency Class VI requirements.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":57024157122905,"sku":null,"price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PSU.png?v=1777333542"},{"product_id":"psu4-module","title":"PSU4 Universal 12V Power Supply","description":"\u003cp data-start=\"219\" data-end=\"594\"\u003eThe \u003cstrong data-start=\"223\" data-end=\"247\"\u003eBLOCKsignalling PSU4\u003c\/strong\u003e is a compact, universal-input power supply module designed to provide stable and reliable 12V DC outputs for model railway electronics where only a single AC or DC power source is available. Ideal for powering controllers, signals, accessories, and layout electronics, the PSU4 simplifies power distribution while ensuring consistent performance.\u003c\/p\u003e\n\u003cp data-start=\"596\" data-end=\"922\"\u003eThe module automatically adapts to a wide range of input voltages, accepting 5–25V DC or 9–16V AC without the need for configuration or polarity checking. Input power can be connected via screw terminals or a standard 2.1mm barrel jack, making the PSU4 equally suitable for hard-wired installations or plug-top power supplies.\u003c\/p\u003e\n\u003cp data-start=\"924\" data-end=\"1275\"\u003eAll outputs are protected by an on-board 1A self-resetting thermal fuse, providing automatic protection against short circuits and overloads. In the event of a fault, power is safely disconnected and then restored once the fault is cleared and the fuse has cooled. A built-in LED provides clear visual indication of output status and fault conditions.\u003c\/p\u003e\n\u003cp data-start=\"1277\" data-end=\"1399\"\u003eDesigned for flexibility, safety, and ease of use, the PSU4 is an ideal power solution for both small and complex layouts.\u003c\/p\u003e\n\u003chr data-start=\"1401\" data-end=\"1404\"\u003e\n\u003ch3 data-start=\"1406\" data-end=\"1421\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eUniversal input accepts 5–25V DC or 9–16V AC automatically\u003cbr data-start=\"1480\" data-end=\"1483\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eProvides multiple stable 12V DC outputs from a single supply\u003cbr data-start=\"1543\" data-end=\"1546\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eNot sensitive to input polarity — no risk of reverse wiring\u003cbr data-start=\"1605\" data-end=\"1608\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eScrew terminal input and 2.1mm barrel jack for flexible power connection\u003cbr data-start=\"1680\" data-end=\"1683\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eFactory-set 12V DC output with high stability (typically ±2%)\u003cbr data-start=\"1744\" data-end=\"1747\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003e1A total output current across all outputs\u003cbr data-start=\"1789\" data-end=\"1792\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eOn-board self-resetting thermal fuse for overload and short-circuit protection\u003cbr data-start=\"1870\" data-end=\"1873\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eAutomatic power restoration once a fault is cleared\u003cbr data-start=\"1924\" data-end=\"1927\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eIntegrated LED status indicator for normal operation and fault conditions\u003cbr data-start=\"2000\" data-end=\"2003\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1422\" data-end=\"2070\"\u003eCompact module ideal for control panels and under-layout mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2072\" data-end=\"2075\"\u003e\n\u003ch3 data-start=\"2077\" data-end=\"2105\"\u003eCompatibility Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"2106\" data-end=\"2369\"\u003eSuitable for powering 12V DC model railway electronics and accessories\u003cbr data-start=\"2176\" data-end=\"2179\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2106\" data-end=\"2369\"\u003eCompatible with both AC and DC external power supplies\u003cbr data-start=\"2233\" data-end=\"2236\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2106\" data-end=\"2369\"\u003eRequires no configuration or adjustment for different input voltages\u003cbr data-start=\"2304\" data-end=\"2307\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2106\" data-end=\"2369\"\u003eMaximum output current: 1A total (shared across all outputs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2681\" data-end=\"2707\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"2709\" data-end=\"2836\"\u003eFor detailed installation guidance, wiring diagrams, and troubleshooting advice, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"2838\" data-end=\"2865\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1Ap7NrLL9M1cP-IsFJ9FfqMI-VKgxObPt\/view?usp=sharing\" target=\"_blank\" title=\"PSU4\" rel=\"noopener\"\u003eUser Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":57184637485401,"sku":null,"price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/PSU4.png?v=1777335753"},{"product_id":"l1","title":"L1-DC Automatic Passing Loop Controller","description":"\u003cp data-end=\"729\" data-start=\"298\"\u003eThe BLOCKsignalling L1-DC Automatic Passing Loop Controller is designed to automate the operation of two trains running around a loop with a passing section. When one train arrives at the passing loop, the module automatically holds it while dispatching the other train after a configurable delay. The controller operates the points and controls the isolated track sections to ensure smooth and reliable alternating train movement.\u003c\/p\u003e\n\u003cp data-end=\"880\" data-start=\"731\"\u003eThis allows two trains to run continuously with minimal operator input, creating realistic and reliable automated operation on model railway layouts.\u003c\/p\u003e\n\u003chr data-start=\"824\" data-end=\"827\"\u003e\n\u003ch3 data-start=\"829\" data-end=\"844\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eAutomatically manages two trains running on a continuous loop with a passing loop.\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eOperates points to route trains onto the correct track.\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eStops arriving trains at isolated sections until the other train is dispatched.\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eConfigurable departure delay and operating behavior.\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eSupports infra red train detection sensors.\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eAllows manual release using a push button if required.\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eDesigned for reliable unattended operation on model railway layouts.\u003c\/li\u003e\n\u003cli data-start=\"896\" data-end=\"978\"\u003eRequires a 12V DC power supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1166\" data-end=\"1169\"\u003e\n\u003ch3 data-start=\"1171\" data-end=\"1199\"\u003eCompatibility Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1404\" data-end=\"1450\"\u003eSuitable for DC powered model railway layouts.\u003c\/li\u003e\n\u003cli data-start=\"1404\" data-end=\"1450\"\u003eIncludes two infra red sensors for train detection and requires isolated track sections for train control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1296\" data-end=\"1299\"\u003e\n\u003ch3 data-start=\"1301\" data-end=\"1327\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"1329\" data-end=\"1475\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"1329\" data-end=\"1475\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1eV891MzL3R2V6suAf23NlCLRUJbaNoPj\/view?usp=sharing\" title=\"L1\" rel=\"noopener\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":57447748731225,"sku":null,"price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/ASP1A_Image_Sensor1_fd68115f-038e-4da6-91a0-cef7815cbff0.jpg?v=1780595026"},{"product_id":"cdu4f-led","title":"CDU4F Fast Charging Capacitor Discharge Unit with Ready LED","description":"\u003cp data-start=\"50\" data-end=\"378\"\u003eThe \u003cstrong\u003eCDU4F Fast Charging Capacitor Discharge Unit\u003c\/strong\u003e delivers a powerful, short-duration current pulse to ensure positive and reliable point motor operation. By storing energy in internal capacitors and releasing it in a controlled burst, it provides strong switching performance without placing excessive load on your power supply.\u003c\/p\u003e\n\u003cp data-start=\"380\" data-end=\"623\"\u003eAfter the initial surge, the CDU limits sustained current to protect point motors from burn-out caused by wiring faults or prolonged switch operation. It also prevents voltage drop across the rest of the layout while points are being operated.\u003c\/p\u003e\n\u003chr data-end=\"665\" data-start=\"662\"\u003e\n\u003ch3 data-end=\"694\" data-start=\"667\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDelivers a high current pulse for positive point motor operation\u003cbr data-start=\"845\" data-end=\"848\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eProtects point motors from burn-out caused by wiring faults or prolonged switching\u003cbr data-start=\"932\" data-end=\"935\"\u003e\n\u003c\/li\u003e\n\u003cli\u003ePrevents voltage fluctuations across the layout during operation\u003cbr data-start=\"1001\" data-end=\"1004\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eFast charging for rapid recovery between operations\u003cbr data-start=\"1057\" data-end=\"1060\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eBuilt-in LED indicators for charge status monitoring\u003cbr data-start=\"1114\" data-end=\"1117\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eReady light fitted as standard, with additional control panel ready LED connection for remote indication.\u003c\/li\u003e\n\u003cli\u003eAvailable in storage capacities suitable for layouts of all sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"988\" data-start=\"985\"\u003e\n\u003ch3 data-end=\"1015\" data-start=\"990\"\u003ePower Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUp to 35V DC or 24V AC input\u003cbr data-start=\"1033\" data-end=\"1036\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eCommonly used with 16V AC controller auxiliary outputs\u003cbr data-start=\"1092\" data-end=\"1095\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eMinimum recommended supply: 12V AC or 15V DC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"988\" data-start=\"985\"\u003e\n\u003ch3 data-end=\"1299\" data-start=\"1273\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-end=\"1445\" data-start=\"1301\"\u003eFor detailed information on installation, wiring connections, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-end=\"1445\" data-start=\"1301\"\u003e\u003ca title=\"CDU4F\" href=\"https:\/\/drive.google.com\/file\/d\/1bngowK7JPPuBlO4N79ggLMHQhTSQOv0F\/view?usp=sharing\" target=\"_blank\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":57905758962009,"sku":null,"price":16.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/CDU4LED_19f1df34-efe8-4d49-853b-c5244cb464f8.png?v=1777333018"},{"product_id":"m1","title":"M1 Universal Sequential Operations Module","description":"\u003cp data-start=\"102\" data-end=\"375\"\u003eThe \u003cstrong\u003eBLOCKsignalling M1\u003c\/strong\u003e is a universal module designed for sequential operations on model railway layouts. It allows multiple actions to be carried out automatically in a defined order, making it ideal for creating realistic, interactive layouts with minimal manual control.\u003c\/p\u003e\n\u003cp data-start=\"377\" data-end=\"741\"\u003eWhen triggered, the module performs a pre-programmed action such as powering a section of track, operating points, or changing signals. It then waits for a train to be detected by the infra-red sensor or for a timed condition to be met. Once complete, the module sends a “DONE” signal which can trigger additional modules, enabling complex sequences to be created.\u003c\/p\u003e\n\u003cp data-start=\"743\" data-end=\"995\"\u003eBy linking multiple M1 modules together, a chain of events can be automated, such as moving trains through a fiddle yard, operating points in sequence, or controlling signalling systems. Modules can also be connected in a loop for continuous operation.\u003c\/p\u003e\n\u003chr data-start=\"833\" data-end=\"836\"\u003e\n\u003ch3 data-start=\"838\" data-end=\"853\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eAutomatically performs pre-programmed actions triggered by input or detection.\u003cbr data-start=\"1090\" data-end=\"1093\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eTwo independent relay outputs for controlling track power, points motors, signals, and more.\u003cbr data-start=\"1185\" data-end=\"1188\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eSupports sequential operation by linking multiple modules together.\u003cbr data-start=\"1255\" data-end=\"1258\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eTrigger inputs include push-button, switch, reed relay, infra-red sensor, or another module.\u003cbr data-start=\"1350\" data-end=\"1353\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eInfra-red train detection for precise, automated control.\u003cbr data-start=\"1410\" data-end=\"1413\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003e“DONE” output allows chaining modules for complex automation.\u003cbr data-start=\"1474\" data-end=\"1477\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eMultiple built-in programs including fiddle yard control, points operation, signalling, and direction change.\u003cbr data-start=\"1586\" data-end=\"1589\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eFully programmable universal mode for custom operation sequences.\u003cbr data-start=\"1654\" data-end=\"1657\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eAdjustable timing, delays, and relay behaviour for flexible operation.\u003cbr data-start=\"1727\" data-end=\"1730\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"1744\"\u003eCompact design with screw terminals for easy wiring.\u003c\/li\u003e\n\u003cli\u003eCompatible with OO, HO, and other scales depending on application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1746\" data-end=\"1749\"\u003e\n\u003ch3 data-start=\"1751\" data-end=\"1779\"\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1781\" data-end=\"1866\"\u003e12V DC power supply required.\u003cbr data-start=\"2340\" data-end=\"2343\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1781\" data-end=\"1866\"\u003eTypical current draw: 10mA idle, 50mA with one relay active, 100mA with both relays active.\u003cbr data-start=\"2434\" data-end=\"2437\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1781\" data-end=\"1866\"\u003eRelay outputs rated up to 1A at 24V DC.\u003cbr data-start=\"2476\" data-end=\"2479\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1781\" data-end=\"1866\"\u003eReverse polarity protected (module will not operate but will not be damaged).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2095\" data-end=\"2098\"\u003e\n\u003ch3 data-start=\"2100\" data-end=\"2126\"\u003eDocumentation \u0026amp; Support\u003c\/h3\u003e\n\u003cp data-start=\"2128\" data-end=\"2290\"\u003eFor detailed information on installation, wiring, programming options, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"2128\" data-end=\"2290\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1DtrCG_ImK5DPSjIafc-yAD4MBrgdbCLF\/view?usp=sharing\" target=\"_blank\" title=\"M1\" rel=\"noopener\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":57961773072729,"sku":null,"price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/M1_90113b73-5fe3-4f92-8342-9059604a3d02.png?v=1777564710"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/collections\/C11.png?v=1776968788","url":"https:\/\/blocksignalling.co.uk\/collections\/dc-products.oembed?page=2","provider":"BLOCKsignalling","version":"1.0","type":"link"}