Pololu TReX - Manual (Page 6)

TReX motor connections (separate battery for the auxiliary motor)
It is possible to power the auxiliary motor with a second, separate 0 – 24 V battery, as shown above. To do so, connect
that battery’s ground to the lower of the two auxiliary motor connection block ports. Connect one of your auxiliary
motor’s leads to the upper connection block port and connect the other of your motor’s leads directly to the battery’s
positive side. You will still need to solder a diode across your auxiliary motor’s terminals.
Option 3:
TReX joint-motor connection
Lastly, you can use both motor 1 and 2 outputs to control a single, more powerful (up to 25 A continuous)
bidirectional motor by connecting it as shown above. One of the motor’s terminals connects to both of motor 1’s
outputs while the other of the motor’s terminals connects to both of motor 2’s outputs. In order to use your TReX in
this way, you must use the serial interface to set the TReX to “joint motor mode”. In this mode, the single bidirectional
Pololu TReX User's Guide © 2001–2013 Pololu Corporation
3. Getting Started Page 6 of 24