Connecting BD1 to a DS54, DS64 and SE8c?
The BD1, block occupancy detector (replaced in 2004 by the BD4) was designed as an add-on device, which took advantage of the block occupancy message generating (over the LocoNet) capabilities of the DS54.
The BD1 is also compatible, for the same purpose, with the DS64 and SE8c.
The following diagrams indicated how to connect the BD1 to the rails, rail power source, and the Digitrax DS54, DS64 and SE8c.
Note: The wires that connect the BD1 to the rails and rail power source are characterized as two heavy, uninsulated, and polarity neutral wires.