Unidrive M / HS Frame 7 to 10 Power Installation Guide 85
Issue Number: 5
Safety information Product information Mechanical installation
Electrical installation
Technical data UL listing information
Figure 4-24 Grounding of signal cable shields using the grounding bracket
4.11.8 Variations in the EMC wiring
Interruptions to the motor cable
The motor cable should ideally be a single length of shielded or armored cable having no
interruptions. In some situations it may be necessary to interrupt the cable, as in the following
examples:
• Connecting the motor cable to a terminal block in the drive enclosure
• Installing a motor isolator/disconnect switch for safety when work is done on the motor
In these cases the following guidelines should be followed.
Terminal block in the enclosure
The motor cable shields should be bonded to the back-plate using uninsulated metal cable-clamps
which should be positioned as close as possible to the terminal block. Keep the length of power
conductors to a minimum and ensure that all sensitive equipment and circuits are at least 0.3m (12
in) away from the terminal block.
Figure 4-25 Connecting the motor cable to a terminal block in the enclosure
From the Drive
To t h e mo t o r
Back-plate
Enclosure
Unidrive M frame7 to 10 Power Installation Guide issue5.book Page 85 Tuesday, May 24, 2016 11:52 AM
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