Rockwell Automation 20P PowerFlex DC Drive - Frame A SCR Modules for Drives with Bus Bars - Manual (Page 13)

PowerFlex® DC Drive - Frame A SCR Modules for Drives with Bus Bars 13
4. Remove the four screws and washers that secure the C and D terminal
bus bars to the horizontal bus bars and remove the C and D terminal bus
bars.
Important: For regenerative drives only, the screws that secure these
bus bars to the SCR Modules are M5 x 16. Retain for reuse
with these bus bars only.
Regenerative drive
Non-Regenerative drive
Remove screws
Remove screws