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Occupancy Detection:

Digitrax: BD4N

Summary: A low-cost, high-sensitivity DCC block-occupancy detection for 4 blocks. Capable of handling up to 8 amps and BDL168 compatible.

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Digitrax BD4N.webp
General information
DCC Category
Occupancy Detection
Manufacturer Digitrax
MSRP 37.00 USD37.67 EUR <br />32.96 GBP <br />55.92 AUD <br />49.92 CAD <br />
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Manufacturer Part Number
Common Name
UPC Number 652667110167
Release information

Product URL External Product Link
Product Manual URL External Product Link
Year Released 11/2020
Has computer interface None
Firmware Upgrade Possible No
Predecessor BD4
Misc Details
Height 27 mm2.7 cm <br />0.027 m <br />1.063 in <br />0.0886 ft <br />
Length 67 mm6.7 cm <br />0.067 m <br />2.638 in <br />0.22 ft <br />
Width 99 mm9.9 cm <br />0.099 m <br />3.898 in <br />0.325 ft <br />


A replacment to the BD4.


The BD4N is simple to install, plug in and begin using on your layout.


  • Support detection in 4 blocks.
  • Handles up to 8 amps of current.
  • On-board status leds for stand-alone occupancy and track power indication, expandable for optional LT5 or fascia mounted occupancy indicator leds.
  • Plug and Play connections to simplify setup. Can cascade Booster wires.
  • Isolated Occupancy output signal lines can drive most common signal system or control interfaces.
  • Compatible with DS64 and SE8 modules for signaling, control and reporting occupancy onto LocoNet.


  • No FAQs link to this page.

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