Rockwell Automation MPM-Bxxx Medium Inertia Servo Motor - Manual (Page 8)

8 MP-Series Medium-inertia Servo Motor with 115 mm to 215 mm Frame Size
Rockwell Automation Publication MPM-IN001D-EN-P - January 2014
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-CPBM7DF-
xxAAxx or 2090-XXNPMF-xxSxx
power cable, loop the signal wire pair to the overall cable shield as shown in Grounding of Signal
Wire Shields in a Power Cable on page 8 . Then clamp all of the shields together in the
power-cable (chassis) ground connection on the drive.
Grounding of Signal Wire Shields in a Power Cable
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.
Install the Motor
MP-Series motors include a mounting pilot for aligning the motor on the machine. Preferred
fasteners are hardened steel. The installation must comply with all local regulations and use
equipment and installation practices that promote safety and electromagnetic compatibility.
ATTENTION: Unmounted motors, disconnected mechanical couplings, loose shaft keys, and disconnected
cables are dangerous if power is applied.
Lock-out and tag-out disassembled equipment (restrict electrical power).
Before applying power to the motor, remove the shaft key and other mechanical couplings that can be thrown
from the shaft.
ATTENTION: Make sure that cables are installed and restrained to prevent uneven tension or flexing at the
cable connections.
Excessive and uneven lateral force on the cable can inhibit environmental sealing as the cable flexes.
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
Connect all signal wire shields and the overall power-cable shield to machine ground:
• The 2090-CPBM7DF-
xxAFxx cable (shown) contains one signal wire pair.
• The 2090-XXNPMF- xxSxx cable contains two signal wire pairs.
All power and signal wire shields must connect to machine
ground.