© 2018 Digitrax, Inc.
www.digitrax.com
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Introduction
The BXPA1 is a combination DCC Auto-Revereser, occupancy detector, Tran-
sponding detector, and intelligent power manager. It is designed to make tran-
sponding implementation easy and provide advanced DCC track management
by communicating all state information to LocoNet. It is recommended that you
familiarize yourself with Digitrax Detection, Transponding, and Auto-Reversing
section wiring before installing the BXPA1. Additional documentation is avail-
able at www.digitrax.com
BXPA1 Installation Notes
The BXPA1 is only compatible for use with Direct Home Layout wiring and re-
quires a LocoNet compatible system for Detection/Transponding Reporting.
The BXPA1 can be located for convenience and ease of installation.
Ensure that booster and track feeds are sufficient to carry currents and detect
short circuits. We recommend at minimum 14AWG bus lines and 22AWG feeder
connections up to the rails.
It is recommend that Zero Stretching be disabled.
BXPA1 Installation
1. Power down your Digitrax LocoNet System.
2. Determine an appropriate mounting location for your BXPA1.
3. Mount the BXPA1 in the appropriate location. The BXPA1 is equipped with
removable screw terminals for easy wiring once the unit is mounted.
4. Connect “INA” to the Rail A terminal on the booster that will be powering
the reversing section.
5. Connect “INB” to the Rail B terminal on the booster that will be powering the
reversing section.
Note: Rail A and Rail B should consistent between all Power Districts, you may need to
switch the Rail A and Rail B connections in the above steps.
6. Connect “OUTA” to the Rail A for the reversing section.
7. Connect “OUTB” to the Rail B for the reversing section.
8. Connect to LocoNet via the LocoNet port using a known good LocoNet Cable.
The BXPA1 must be connected to LocoNet to function Properly.
9. For use with DCS51 command stations turn the trip speed pot counter clock-
wise until reliable auto-reversing is achieved.
Turning on your system and configuring the BXPA1
Once you have installed your BXPA1, there are several tests you should perform
to ensure that the BXPA1 is properly functioning.
Power on your Digitrax System and the section of your layout where the BXPA1 is
connected. Using a small piece of wire or some other conductor short the “INA”
and “INB” terminals together the booster connected to the BXPA1 should reliably
shut down.
