Rockwell Automation 20P PowerFlex DC Drive - Frame B Field SCR Module - Manual (Page 13)

PowerFlex® DC Drive - Frame B Field SCR Module 13
Step 5: Install the Field
Board and New Field SCR
Module Install the Field board and new Field SCR module in reverse order of
removal as detailed in Step 4:
Remove the Field Board and Existing Field
SCR Module on page 12 .
•
Apply thermal grease to the bottom of the SCR module before securing
it to the heatsink.
•
Tightening torque for the screws connecting the Field SCR module to the
heatsink and the screws connecting the Field board to the Field SCR and
Dual Diode modules is 2.5…4.0 N•m (22…35 lb•in).
•
Inspect the existing X3 and XFCD cables for burn marks, cracks or loose
connectors. If necessary, replace the cables on the Field board with the
new cables provided.
Step 6: Install the Pulse
Transformer and Switching
Power Supply Boards Install the Pulse Transformer and Switching Power Supply boards in reverse
order of removal as detailed in Step 3:
Remove the Pulse Transformer and
Switching Power Supply Boards on page 5 .
•
Verify that the four plastic board stabilizers mounted on the top air flow
plate are placed one on either side of each of the Pulse Transformer and
Switching Power Supply boards.
ATTENTION: Thermal grease must be applied to the bottom of
the Field SCR module before securing it to the heatsink or
damage to the drive may occur.
ATTENTION: Each gate lead cable must be connected to the
exact connector from which it was removed on the Pulse
Transformer circuit board or damage to the drive may occur.
One plastic stabilizer should be on either side of each board Air flow plate
Plastic
stabilizers
Top view of Pulse Transformer board Side cut-away view
Pulse Transformer board
Switching Power Supply board