Rockwell Automation SMC Dialog Plus, User Manual

Page: 45 / 189

Installation 2-19
Wiring
Wire in an industrial control application can be divided into three
groups: power, control, and signal. The following recommendations
for physical separation between these groups is provided to reduce the
coupling effect.
• Different wire groups should cross at 90° inside an enclosure.
• Minimum spacing between different wire groups in the same tray
should be six inches (16 cm).
• Wire runs outside an enclosure should be run in conduit or have
shielding/armor with equivalent attenuation.
• Different wire groups should be run in separate conduits.
• Minimum spacing between conduits containing different wire
groups should be three inches (8 cm).
Accessory Requirements
When connection of the Bulletin 825 converter module or Bulletin
1202 communication cable is required, a ferrite core suppressor (Fair-
Rite PN 2643802702 or equal) should be used in conjunction. Mount
the suppressor as close to the controller as practical, wrapping the
cable twice through the suppressor.