Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 422)

Section 7C
Power Distribution and Wiring Guidelines
7C-4
electromagnetic noise. If there is no electric conductivity between the
metallic conduit and the frame or the cabinet, connect them using a
conductor.
Important: Run cables carrying weak signals inside metallic conduit
whenever possible. Do not use the metallic conduit as the grounding
connection for the frame or the cabinet. Use an exclusive conductor for
grounding.
Figure 7C.2
Cable Routing
Machine
connections
panel
Motor power
Feedback
AC power AC power
Axis
drive
cabinet
Recommended
steel
dividers
9/230, 9/260, or
9/290
controller cabinet
Customer
AC
power
Application
power
distribution
panel
Axis signals Drive command
Discrete I/O
Machine
cable
conduits
11238-I
Noise Suppressors
To prevent noise in the ac power line on the power receiving side
(controller side), connect a filter or transformer as shown in Figure 7C.3.