RR-CirKits BOD-8-SM Block Occupancy Detector

RR-CirKits BOD-8-SM Block Occupancy Detector

This new board is compatible with LCC node sample mode which allows using output drivers on the same I/O port. This board operates as a DCC occupancy detector for 8 blocks using remote CT coils. It outputs logic levels, and has a RR-CirKits standard ribbon connector interface. The "Power-Lok" feature monitors the DCC bus power. A power failure latches the detection status of each block until power is restored and re-stabilized.

All RR-CirKits Tower Controller I/O modules may be plugged directly into the TC64, or else mounted in Tyco 3-1/4" Snap-Track® mounted to the bench work and connected with ribbon cables. Each I/O module is equipped with two connectors to facilitate these connection options.

Remote Sensing The BOD-8 uses small CT (Current Transformer) detection coils placed directly on the track feeders between the rail and the power bus. Lengths of Cat-5 cable are the usual way to connect the coils to the detector boards. CT coil sensors cause no track voltage losses like those associated with diode drop detectors. Normal detection levels are 1ma. for use with 10K wheel sets. Sensitivity may be decreased with the on board pots for situations requiring less sensitivity. To further reduce sensitivity place resistors across the coils.

The BOD-8 outputs lines are low during train detection so the TC-64 or other I/O device should be configured as "Detector" for each port that is connected to a BOD-8. This inverted input mode matches most types of detector outputs.