{"product_id":"sec4b-dcc","title":"SEC4B-DCC Block Section Controller with LED Signal Control","description":"\u003cp data-start=\"2648\" data-end=\"3019\"\u003eThe \u003cstrong data-start=\"2652\" data-end=\"2700\"\u003eBLOCKsignalling SEC4B-DCC Section Controller\u003c\/strong\u003e provides the same DCC block protection and realistic stopping behavior as the SEC4A-DCC, preventing multiple trains from entering the same protected section. It uses infra-red train detection and automatically operates entrance signals and a short isolated approach section to stop approaching trains at a red signal.\u003c\/p\u003e\n\u003cp data-start=\"3021\" data-end=\"3498\"\u003eWhen a train is detected entering the block, the module sets the signal to danger (red) and switches the isolated approach section from DCC to DC so DCC-equipped locomotives decelerate smoothly to a halt. Once the train has cleared the exit sensor, the module restores DCC and returns the signals to the correct aspect. It also supports inter-block communication for correct 3- and 4-aspect signalling and includes advanced modes such as station stop and bidirectional running.\u003c\/p\u003e\n\u003cp data-start=\"3500\" data-end=\"3549\"\u003eThis version is for \u003cstrong data-start=\"3520\" data-end=\"3548\"\u003ecommon-anode LED signals\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"3551\" data-end=\"3554\"\u003e\n\u003ch3 data-start=\"3556\" data-end=\"3571\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eMonitors trains entering and leaving a section of track using infra-red sensors.\u003cbr data-start=\"3653\" data-end=\"3656\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eAutomatically sets the signal at the start of the section to danger (red).\u003cbr data-start=\"3730\" data-end=\"3733\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eSwitches an isolated approach section from DCC to DC so DCC locomotives decelerate and stop at the signal.\u003cbr data-start=\"3839\" data-end=\"3842\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eCommunicates with previous sections so 3- and 4-aspect signals show yellow and double-yellow correctly.\u003cbr data-start=\"3945\" data-end=\"3948\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eFinal section can simulate a return to green using timers for realistic multi-aspect behavior.\u003cbr data-start=\"4043\" data-end=\"4046\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003ePoints not set in the train’s favor can force the signal to danger and switch the isolating section to DC.\u003cbr data-start=\"4153\" data-end=\"4156\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eSignal can be forced to danger via an external input, useful for starter signals.\u003cbr data-start=\"4237\" data-end=\"4240\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eSupports 2-, 3-, and 4-aspect LED signalling and includes bidirectional running modes with 2-aspect signals.\u003cbr data-start=\"4348\" data-end=\"4351\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eIncludes additional station stop modes and an additional Dapol output.\u003cbr data-start=\"4421\" data-end=\"4424\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eCan remember occupancy status after power-off and automatically restore signals when power returns.\u003cbr data-start=\"4523\" data-end=\"4526\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3573\" data-end=\"4602\"\u003eSimple to set up, with full configuration available for realistic operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4604\" data-end=\"4607\"\u003e\n\u003ch2 data-start=\"4609\" data-end=\"4635\"\u003eElectrical Requirements\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"4637\" data-end=\"4668\"\u003eRequires a 12V DC power supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4670\" data-end=\"4673\"\u003e\n\u003ch2 data-start=\"4675\" data-end=\"4703\"\u003eCompatibility Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"4705\" data-end=\"4771\"\u003eDesigned for DCC layouts.\u003cbr data-start=\"4730\" data-end=\"4733\"\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"4705\" data-end=\"4771\"\u003eSuitable for common-anode LED signals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4773\" data-end=\"4776\"\u003e\n\u003ch2 data-start=\"4778\" data-end=\"4804\"\u003eDocumentation \u0026amp; Support\u003c\/h2\u003e\n\u003cp data-start=\"4806\" data-end=\"5025\"\u003eFor detailed information on installation, wiring, programming, and troubleshooting, please download the latest instruction manual:\u003c\/p\u003e\n\u003cp data-start=\"4806\" data-end=\"5025\"\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1Z04p-pu0pSO3LOnptv23V5kVqFv3ydCv\/view?usp=sharing\" target=\"_blank\" title=\"SEC4\" rel=\"noopener\"\u003eProduct Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"BLOCKsignalling","offers":[{"title":"Default Title","offer_id":56894671618393,"sku":null,"price":29.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/4009\/9673\/files\/SEC_040237d9-dd1a-4a82-9d7b-d0dd218875d5.png?v=1777334677","url":"https:\/\/blocksignalling.co.uk\/products\/sec4b-dcc","provider":"BLOCKsignalling","version":"1.0","type":"link"}