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800-5521 BD-1HD Block Occupancy Detector- Opto-Electronic - MPM Hobbies

800-5521 BD-1HD Block Occupancy Detector- Opto-Electronic

$30.74 
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SKU: TOR5521
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Provides operating 2 color Block Signals for bi-directional train traffic. The system will provide positive “Occupied” indications whenever any piece of rolling stock is within the block and a “Clear” indication when no train is detected. The system will be able to power 2 color signals at each end of the block without additional drivers.

The BD-1HD is identical to the BD-1 but includes heavy duty output transistors to power lamps in large scale signals. Each output on the BD-1HD can control 500 ma.