Rockwell Automation 1394 SERCOS Interface Multi-Axis Motion Control System Installation Manual - Manual (Page 22)

Publication 1394-IN002B-EN-P — February 2004
1-12 Installing Your 1394 SERCOS Interface System
Planning Your Panel Layout This section outlines the practices which minimize the possibility of
noise-related failures as they apply specifically to 1394 installations.
For more information on the concept of electrical noise reduction,
refer to System Design for Control of Electrical Noise Reference Manual
(publication GMC-RM001x-EN-P).
Establishing Noise Zones
Observe the following guidelines when laying out your panel (refer to
Figure 1.7 for zone locations).
•
The clean zone (C) is to the left of the 1394 and includes the
I/O wiring, feedback cable, and DC filter (grey wireway).
•
The dirty zone (D) is beneath and to the right of the 1394 (black
wireway) and includes the circuit breakers, transformer, 24V dc
power supply, contactors, AC line filter, and motor power cables.
•
The very dirty zone (VD) is limited to where the AC line (EMC)
filter VAC output jumpers over to the 1394. Shielded cable is
required only if the very dirty cables enter a wireway.
•
The SERCOS fiber-optic cables are immune to electrical noise, but
are relatively fragile and best run with other light weight cables.
Figure 1.7
Establishing Noise Zones
1 If I/O cable contains (dirty) relay wires, route wires in dirty wireway.
2 This is a clean 24V dc available for any device that may require it. The 24V enters the clean wireway and exits to
the left.
3 This is a dirty 24V dc available for motor brakes and contactors. The 24V enters the dirty wireway and exits to the
right.
(1)
C
D D
VD
D
C
Status
DANGER RISK OF ELECTRICAL SHOCK. HIGH VOLTAGE MAY EXIST UP TO FIVE MINUTES AFTER REMOVING POWER.
SERCOS System Module
Route 24V dc I/O
Shielded Cable
Route Encoder/Analog/Registration
Shielded Cable
Dirty Wireway Clean Wireway
Very dirty unshielded power connections
segregated (not in wireway)
24V Motor
Brake PS
Circuit
Breaker
XFMR
AC
Line Filter
DC
Filter
Contactors
1394 SERCOS interface System
3
2
I/O 1 and
Feedback Cables