Grounding, General 2-87
Safety Ground - PE
This is the safety ground for the drive that is required by code. This point
must be connected to adjacent building steel (girder, joist), a floor ground
rod or bus bar (see above). Grounding points must comply with national and
local industrial safety regulations and/or electrical codes. A second terminal
is provided for the motor ground connection.
Shield Termination - SHLD
The SHLD terminal (located on the Cable Entry Plate) provides a
grounding point for the motor cable shield. It must be connected to an earth
ground by a separate continuous lead. The motor cable shield should be
grounded to both the drive Cable Entry Plate (drive end) and the motor
frame (motor end).
When shielded cable is used for remote control and signal wiring, the
shield should be grounded at the source end only, not at the drive.
RFI Filter Grounding
Using an optional RFI filter may result in relatively high ground leakage
currents. Therefore, the filter must only be used in installations with
grounded AC supply systems and be permanently installed and solidly
grounded (bonded) to the building power distribution ground.
Ensure that the incoming supply neutral is solidly connected (bonded) to the
same building power distribution ground. Grounding must not rely on
flexible cables and should not include any form of plug or socket that would
permit inadvertent disconnection. Some local codes may require redundant
ground connections. The integrity of all connections should be periodically
checked. Refer to the instructions supplied with the filter
No. Description
Install as
Needed Notes
1 Programmable Controller Refer to publication 1770-4.1 for Programmable
Controller Grounding Recommendations
2 PE Motor ground
3 PE (Safety) - ground bus PE to bus to building steel
4 Nearest building structure steel
5 Shield
6 Additional shield (if required) ✔
7 Attach to motor frame Ground per local or national codes
8 Analog signal
9 Motor Terminator ✔
10 Common mode core ✔
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