Rockwell Automation Publication 520-UM001I-EN-E - July 2016 21
Installation/Wiring Chapter 1
Ground Fault Monitoring
If a system ground fault monitor (RCD) is to be used, only Type B (adjustable)
devices should be used to avoid nuisance tripping.
Safety Ground - (PE)
This is the safety ground for the drive that is required by code. One of these
points must be connected to adjacent building steel (girder, joist), a floor ground
rod or bus bar. Grounding points must comply with national and local industrial
safety regulations and/or electrical codes.
Network Ground
Connect terminal C1 to a clean earth ground when using a network with a star
topology (EtherNet/IP) or daisy-chain (RS485). It is acceptable to ground both
C1 and C2 terminals.
Connect terminal CS1 or CS2 to a clean ground when using a network with a
ring topology (EtherNet/IP).
For more information on EtherNet/IP networks, see Ground Connections for
EtherNet/IP Networks on page 248.
For more information on RS485 networks, see Network Wiring
on page 201.
Motor Ground
The motor ground must be connected to one of the ground terminals on the
drive.
Shield Termination - SHLD
Either of the safety ground terminals located on the power terminal block
provides a grounding point for the motor cable shield. The motor cable shield
connected to one of these terminals (drive end) should also be connected to the
motor frame (motor end). Use a shield terminating or EMI clamp to connect the
shield to the safety ground terminal. The earthing plate or conduit box option
may be used with a cable clamp for a grounding point for the cable shield.
When shielded cable is used for control and signal wiring, the shield should be
grounded at the source end only, not at the drive end.
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