Rockwell Automation 8720MC High Performance Drives Installation Manual - Manual (Page 28)

Publication 8720MC-IN001D-EN-P — December 2002
1-16 Installing Your 8720MC Drive
When a regenerative power supply (8720MC-RPSxxx) is not used in
the 8720MC system, observe the following guidelines when laying out
your panel (refer to Figure 1.7 for zone locations).
• The clean zone (C) is beneath the 8720MC left and includes the P1
and P4 connector wiring (grey wireway).
• The dirty zone (D) is beneath the 8720MC to the right (black
wireway) and includes fuses, contactors, circuit breakers, and the
AC input to the AC (EMC) line filter.
• The very dirty zone (VD) is limited to where the AC line (EMC)
filter AC output jumpers over to the 8720MC. Shielded cable is
required only if the very dirty cables enter a wireway.
• The SERCOS fiber-optic cables are immune to electrical noise.
Figure 1.7
Establishing Noise Zones (without 8720MC-RPS)
1
For examples of shield clamp attachment, refer to the System Design for Control of Electrical Noise Reference
Manual (publication GMC-RM001x-EN-P).
2 If necessary, the AC line filter may be moved ahead of the input contactors and fuses. However, it is important to
segregate the very dirty wiring between the filter and drives and keep as short as possible to prevent noise
coupling into susceptible circuits.
(1)
C C D
VD
D
P1 P4 P5
TB1
Shield Clamp(s)
1
Route 24V dc I/O
Shielded Cable
Route Encoder/Analog/Registration
Shielded Cable
Motor Power
Shielded Cable
Line
Fuses AC
Line Filter 2
Contactors
8720MC
B Frame Chassis
Dirty Wireway Clean Wireway
Shield
Clamps
Circuit
Breaker
Keep very dirty connections as short as
possible and segregated (not in wireway)