SDCC1 DCC Model Railway Shuttle Controller with Station Stops

About the Product

The BLOCKsignalling SDCC1 is an automatic DCC model railway shuttle controller with station stops, designed to run a single DCC locomotive backwards and forwards with realistic acceleration and deceleration. Its built-in DCC command station and speed control allow automatic operation without a separate DCC controller.

At each end of the shuttle line, the locomotive is detected as it enters an isolated track section. The SDCC1 automatically slows the train to a stop, waits for the selected period and then accelerates it away in the opposite direction.

One or more intermediate station stops can also be added. As the locomotive enters a station section, it automatically decelerates, waits and then accelerates away in the same direction. There is no fixed limit on the number of intermediate station sections that can be used along the shuttle line.

The SDCC1 can also be configured for continuous loop operation with station stops, making it suitable for layouts where a train needs to travel continuously around a loop while automatically stopping at one or more stations.

Key Features

• Automatically operates a single DCC locomotive backwards and forwards.
• Supports one or more intermediate automatic station stops.
• Can also operate a train continuously around a loop with station stops.
• Built-in DCC command station and locomotive speed control.
• No separate DCC command station or speed controller required.
• Realistic acceleration and deceleration when starting and stopping.
• Adjustable locomotive speed using an on-board control.
• Adjustable waiting time at stations and the ends of the shuttle line.
• Uses isolated track sections for train detection.
• Compatible with DCC locomotives using short addresses from 1 to 99.
• Designed for OO/HO and N gauge model railway layouts.
• Maximum track output of 0.5A.
• Emergency stop function using the on-board push button.
• Built-in overload and short-circuit protection.
• LED indications for power, train detection, programming and track output.

The SDCC1 is a self-contained mini DCC command station. The locomotive speed is set directly using the adjustment on the module, with the speed setting corresponding to the 28 DCC speed steps. This provides a straightforward way of creating an automatic DCC shuttle without using a computer or separate command station.

Basic DCC Shuttle Operation

For basic shuttle operation, the track is divided into a main section and two isolated end sections. When the locomotive reaches either end section, the SDCC1 detects it, brings it to a controlled stop, waits for the selected time and then sends it back in the opposite direction.

DCC Shuttle with Station Stop

Additional isolated sections can be created for automatic station stops. These sections should extend sufficiently either side of the platform to give the locomotive time to decelerate. Any number of station sections can be connected to the station-stop input.

Loop Operation with Station Stops

The SDCC1 can also operate a locomotive continuously around a model railway loop with one or more automatic station stops. Each station's isolated detection section is connected to the station-stop input, allowing the train to stop, wait for the selected period and then continue around the loop.

Speed and Waiting Time Adjustment

On-board SPEED and TIME adjustments allow the locomotive speed and waiting time to be set directly on the SDCC1. This makes it easy to adjust the automatic operation to suit the locomotive and length of the layout.

DCC Locomotive Compatibility

The SDCC1 is designed for a single DCC-equipped locomotive using a short DCC address from 1 to 99. Extended/long DCC addressing is not supported. The module provides a maximum output of 0.5A, so locomotives fitted with sound or stay-alive capacitors should be checked to ensure their current requirements are suitable.

The shuttle track must be a separate, electrically isolated section of the layout. The SDCC1 must not be connected to the output of another DCC command station or speed controller.

Electrical Requirements

• Supply voltage: 12V DC
• Recommended power supply: 1A
• Maximum track output: 0.5A
• Power connection: Screw terminals or DC power jack
• DC jack size: 5.5mm outer × 2.1mm inner
• DC jack polarity: Centre positive
• DCC addressing: Short addresses 1-99
• Layout suitability: OO/HO and N gauge
• Track requirement: Dedicated isolated shuttle section

A compatible BLOCKsignalling PSU2 12V DC 1A Power Supply can be used to power the SDCC1.

Do not connect the SDCC1 to the auxiliary output of a train controller. The manual specifies a suitable 12V DC power supply, as accessory outputs may be insufficiently smooth or stable and could cause unpredictable operation or damage.

Protection & Emergency Stop

Pressing the on-board button immediately removes track power, providing an emergency stop if a locomotive needs to be stopped or re-railed. The SDCC1 also includes protection against track short circuits and overload conditions, automatically removing track power when necessary.

Documentation & Support

For full installation instructions, track wiring, locomotive setup, programming and troubleshooting, please refer to the product instruction manual:

Product Instruction Manual