NCE 524-205 BD20 Block Detector – DCC Current Sensing Detector

The NCE 524-205 BD20 Block Detector is a reliable and easy-to-install current-sensing device designed to detect train presence on DCC layouts. By monitoring current draw in a track section, the BD20 provides accurate occupancy detection without requiring complex wiring or modifications to your rolling stock.

Simply route one of the track feeder wires through the built-in sensing coil, and the BD20 will detect when a locomotive or lighted car is present in the block. This makes it ideal for signaling systems, automation, and layout control applications.

Compact and efficient, the BD20 is perfect for both small layouts and larger, more advanced DCC systems requiring dependable block detection.

Features:

• Genuine NCE BD20 block detector
• Current-sensing design for reliable occupancy detection
• No direct electrical connection to the track required
• Simple installation—just loop feeder wire through sensor
• Ideal for signaling, automation, and detection systems
• Compact PCB design with screw terminal connections
• Works with lighted cars and locomotives

Compatible With:

• NCE Power Pro, Power Cab, and other DCC systems
• Signal systems and automation controllers
• Layout block detection setups

Perfect For:
Model railroaders looking to add block detection for signaling, automation, or occupancy tracking without complex installation.

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