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RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions
Publication RDB-IN002A-EN-P — October 2009
Ground the Shielded Signal Wires within a Power Cable
Always ground the shield on any signal wires inside a power cable. Connecting this
shield to chassis ground reduces the potential for voltage inductance and EMI.
To ground the shield wire on a 2090-CPBM7DF-
xx
AF
xx
or 2090-XXNPMF-
xx
S
xx
power cable:
1.
Loop the signal wire pair to the overall cable shield as shown in the
diagram.
• Cable 2090-CPBM7DF-
xx
AF
xx
(shown) contains one signal wire pair.
• Cable 2090-XXNPMF-
xx
S
xx
contains two signal wire pairs.
2.
Clamp all signal wire shields and the overall power-cable shield in the
power cable (chassis) ground clamp on the drive.
Grounding of Signal Wire Shields in a Power Cable
SHOCK HAZARD
If any shield on a power cable is not grounded, high voltage can be present on that
shield.
Make sure there is a connection to ground for all shield wires inside a power cable, and
for the overall power cable shield.
Failure to observe safety precautions could result in personal injury or damage to
equipment.
Shielded Signal Wires (one pair shown) within Power
Cable
Overall Power Cable Shield
Signal Wire Shield Contacts Overall Power
Cable Shield
Factory Supplied
Field Modified
All power and signal wire shields must connect to
machine ground.
