Allen-Bradley MPL-A310 Installation Instructions Manual page 8

8 MP-Series Low-inertia Servo Motor with 100 mm to 165 mm Frame Size
Ground Shielded Signal Wires within a Power Cable
Always connect the shield on any signal wire pair routed inside a power cable to the overall
machine ground.
If you are installing a 2090-XXNPMF-xxSxx or 2090-CPBM4DF-xxAFxx power with brake
cable, loop the signal wire pairs to the overall cable shield as shown in
Shields in a Power Cable on page
(chassis) ground connection on the drive.
Grounding of Signal Wire Shields in a Power Cable
Factory Supplied
Field Modified
2090-XXNPMF-xxSxx (shown) contains two signal wire pairs.
2090-CPBM4DF-xxAFxx contains one signal wire pair.
The signal wire pairs within a power cable often carry a 24V DC brake signal, but can also carry
logic signals. Grounding the shield that surrounds the signal wires dissipates an induced voltage
and reduces the effects of EMI.
Rockwell Automation Publication MP-IN001I-EN-P - January 2015
8. Then clamp all of the shields together in the power cable
Shielded Signal Wires (two pairs) within Power Cable
Overall Power Cable Shield
Signal Wire Shield (one of two) Contacts Overall Power
Cable Shield
All power and signal wire shields must connect to machine ground.
The diagram shows one of the two signal wires in the correct
position. Connect both signal wire shields and the overall power
cable shield to machine ground.
Grounding of Signal Wire