Rockwell Automation SA500 AC Power Modules - Manual (Page 46)

4-18 SA500 Power Modules
Step 3. Disconnect the DC Bus Supply wires from the Power Module’s POS, NEG,
and GND terminals. Disconnect the motor leads from the U, V, and W
terminals on the Power Module.
Step 4. Remove the screws that attach the Power Module to its mounting surface.
Step 5. Install the replacement Power Module by reversing steps 3 and 4 above.