SEC4A-DCC Block Section Controller with LED Signal Control

About the Product

The BLOCKsignalling SEC4A-DCC Section Controller is designed for DCC layouts to protect a block section of track and prevent more than one train entering the section at the same time. It monitors trains entering and leaving using infra-red sensors mounted below the track and automatically controls the signal at the entrance to the block.

When a train enters the section, the module sets the entrance signal to danger (red) and switches a short isolated approach section from DCC to DC. This causes DCC-equipped locomotives (configured to stop on DC) to decelerate realistically and come to a standstill in front of the red signal. The module then restores DCC and clears the signal once the train has left the section. For multi-aspect signalling, the module can communicate with adjacent blocks to display correct yellow and double-yellow aspects.

This version is for common-cathode 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 behaviour.
  
• Points not set in the train’s favour 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-cathode LED signals.

Documentation & Support

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

Product Instruction Manual