SEC4B-DCC Block Section Controller with LED Signal Control

About the Product

The BLOCKsignalling SEC4B-DCC Section Controller 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.

When 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.

This version is for common-anode LED signals.

Key Features

• Monitors trains entering and leaving a section of track using infra-red sensors.
  
• Automatically sets the signal at the start of the section to danger (red).
  
• Switches an isolated approach section from DCC to DC so DCC locomotives decelerate and stop at the signal.
  
• Communicates with previous sections so 3- and 4-aspect signals show yellow and double-yellow correctly.
  
• Final section can simulate a return to green using timers for realistic multi-aspect behavior.
  
• Points not set in the train’s favor can force the signal to danger and switch the isolating section to DC.
  
• Signal can be forced to danger via an external input, useful for starter signals.
  
• Supports 2-, 3-, and 4-aspect LED signalling and includes bidirectional running modes with 2-aspect signals.
  
• Includes additional station stop modes and an additional Dapol output.
  
• Can remember occupancy status after power-off and automatically restore signals when power returns.
  
• Simple to set up, with full configuration available for realistic operation.

Electrical Requirements

• Requires a 12V DC power supply.

Compatibility Information

• Designed for DCC layouts.
  
• Suitable for common-anode LED signals.

Documentation & Support

For detailed information on installation, wiring, programming, and troubleshooting, please download the latest instruction manual:

Product Instruction Manual