Rockwell Automation TL-Series Servo Motor - Manual (Page 8)

8 TL-Series Servo Motor Installation Instructions
Publication TL-IN001C-EN-P — March 2005
Installing Cables
Knowledgeable cable routing improves system electromagnetic compatibility
(EMC). To install the cables:
1. Keep wire lengths as short as physically possible.
2. Route signal cables (encoder, serial, analog, etc.) away from motor and power
wiring.
3. Separate cables by 0.3 m (1 ft) minimum for every 9 m (30 ft) of parallel run.
4. Ground both ends of the cable shield and twist the signal wire pairs to prevent
electromagnetic interference (EMI) from other equipment.
Preventing Electrical Noise
Electromagnetic interference (EMI), commonly called noise, may adversely impact
motor performance by inducing stray signals. Effective techniques to counter EMI
include filtering the AC power, shielding and separating signal carrying lines, and
practicing good grounding techniques.
Effective AC power filtering can be achieved by using isolated AC power
transformers or properly installed AC line filters.
To help avoid EMI:
• Physically separate signal lines from motor cabling and power wiring. Do not
route signal wires with motor and power wires, or over the vent openings of
servo drives.
!
ATTENTION
High voltage can be present on the shields of a power cable, if
the shields are not grounded.
Ensure there is a connection to ground for all shields in the
power cable.
Failure to observe these safety procedures could result in
personal injury or damage to equipment.