Rockwell Automation 8720MC High Performance Drives Installation Manual - Manual (Page 29)

Publication 8720MC-IN001D-EN-P — December 2002
Installing Your 8720MC Drive 1-17
Observe the following guidelines when installing your 1756-MxxSE
SERCOS interface module (refer to Figure 1.8 for zone locations).
• The clean zone (C) is beneath the less noisy modules (I/O, analog,
encoder, registration, etc. (grey wireway)
• The dirty zone (D) is above and below the power supply and
noisy modules (black wireway)
• The SERCOS fiber-optic cables are immune to electrical noise.
Figure 1.8
Establishing Noise Zones (ControlLogix)
(1)
D
D
C
EMC
Filter
Spare Slot(s)
Dirty Wireway Clean Wireway
Route dirty wireways directly above the ControlLogix rack
(shielded by the chassis)
EMC filter/power supply
connections segregated
(not in wireway)
Dirty I/O
(24V dc I/O, AC I/O)
Clean I/O
(Analog, Encoder
Registration, etc.)