Build and route cables – Rockwell Automation RDD-B4102 Rotary Direct Drive Bearingless Motors User Manual
Page 7
RDD-Series Rotary Direct Drive Bearingless Motor Installation Instructions 7
Publication RDB-IN002B-EN-P — February 2010
Build and Route Cables
Knowledgeable cable routing and careful cable construction improves system
performance.
Follow these guidelines to build and install cables:
• Keep wire lengths as short as physically possible.
• Route noise sensitive wiring (encoder, serial, I/O) away from input power
and motor power wiring.
• Separate cables by 0.3 m (1 ft) minimum for every 9 m (30 ft) of parallel
run.
• Ground both ends of the encoder cable shield and twist the signal wire
pairs to cancel electromagnetic interference (EMI) from other equipment.
WARNING
Do not tightly gather or coil the excess length of a power cable. Heat is generated within
a cable whenever power is applied. Always position a power cable so it may freely
dissipate any heat.
A power cable should not be coiled b
y itself or with other power cables. Refer to System
Design for Control of Electrical Noise Reference Manual, publication
information on how to handle excess cable lengths.
Failure to observe these safety procedures could result in personal injury or equipment
damage.