Answered: Power Expander problems

I’m trying to get the Power Expander to work.

I have a solid green light on the Power Expander, and I have 3 of the inputs connected to the Vex controller. I tried connecting a motor into any of the 3 outputs, but it does not seem to work. When I bypass the power expander by connecting the motor to what I had originally connected to the Power Expander, the motor turns correctly (as per the joystick controls). Reconnecting the working motor circuit to the power expander does not move the motor.

Do I have a bad power expander or is there something I am doing wrong? I assume I do not need to connect anything to the status port??


Paul Tan.

**You may have the PWM Cables connected wrong/backwards if you are not using Keyed connectors.

Note: When using Non-Keyed PWM Cables on the VEX Power Expander, the Gnd/Blk wire should be closest to the key slot on the STATUS and IN Ports, and it should be the furthest from the key slot on the OUT ports.**

Thank you.

That was indeed the problem.

Glad you got it working!