The Circuitron BD-1HD Block Occupancy Detector is an electronic module for model railroaders building bi-directional train traffic blocks. It provides positive occupied and clear indications and supports two-color signals at both ends of a block without additional drivers.
Product Details
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Manufacturer: Circuitron Electronics
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Product: BD-1HD block occupancy detector, opto-electronic
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Application: Bi-directional model railroad block detection
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Signal support: Two-color signals at each end of a block
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Output: Heavy-duty output transistors for lamps in large-scale signals, with up to 500 mA per output
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Scale: Not specified by the manufacturer
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Set size: One detector product
How It Works
The system provides an occupied indication whenever any piece of rolling stock is within the block and a clear indication when no train is detected. The BD-1HD is based on the BD-1 design and adds heavy-duty output transistors for higher-power signal applications.
Manufacturer Information
For manufacturer details, visit Circuitron Electronics. For related layout components, browse Train Layout Construction.
