Rockwell Automation System Design for the Control of Electrical Noise - Manual (Page 40)

Publication GMC-RM001A-EN-P — July 2001
3-8 Segregating Sources and Victims
Minimizing Loops
Wires that form a loop make an efficient antennae. Run feed and
return wires together rather than allowing a loop to form. Twisting the
pair together further reduces the antennae effects. Refer to the figure
below for an illustration.
Note: This applies to potential victim wiring too. Antennae work
equally well in both receive and transmit modes.
Figure 3.4
Avoiding loops in wiring designs
Routing System Wires and
Cables Between Panels Follow the same segregation guidelines when wiring between panels
and machine devices.
• Maintain clean, dirty, and very-dirty noise zones.
• Always use separate, grounded, metal wireways.
Not Recommended Good Solution Better Solution
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