Rockwell Automation 20-750-xxxx Network Communication Option Card (for use with PowerFlex 750-Series Drives) - Manual (Page 2)

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Insert the network communication option module into drive Port 4, 5 or 6.
Make sure the module is fully seated into the connector.
DETAIL A
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Important: If a PowerFlex 20-750-PBUS Profibus option module resides
in the adjacent port to the right of the port in which the new
module is being installed—and the lower mounting screw of
the new module is a T15 Torx head screw (shown in DETAIL
A above)—that screw may electrically contact the metal
Profibus cable connector attached to the Profibus option
module. This may cause faulty operation. To prevent this,
perform steps 4-A through 4-C below. If a PowerFlex
20-750-PBUS Profibus option module is not in that port,
disregard these steps and proceed to step 5.
A. Remove the lower mounting screw, a T15 Torx head screw shown in
DETAIL A above, from the new module being installed.