Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 55)

Section 2A
Planning Your System Layout
2A-10
Installing Servo Modules
Digital and analog servo modules include processors that make them very
sensitive to electrical noise. These modules must be placed more than 100
mm (4 in) away from devices and cables to which any AC voltages or DC
voltages greater than 50 Vdc are applied.
Installing Operator Panels
You must place the Operator Panel more than 300 mm (12 inches) away
from devices (transformers, main AC, electromagnetic contactors, etc.)
that generate magnetic fields to protect the CRT display from any possible
adverse effects.
However, a strong magnetic field generated by multiple devices can have
an adverse effect on the CRT display even if the operator panel is placed
more than 300 mm away from these devices. If this occurs, shield the
operator panel from the devices using an electromagnetic and electrostatic
shield plate.
Installing Servo Amplifiers
If you are installing analog servo amplifiers, refer to documentation that
came with your amplifiers for specific installation instructions.
If you are using digital servo amplifiers, place them vertically so that
cooling air can flow upward and remove heat efficiently. Figure 2A.4 and
Figure 2A.5 show the digital servo amplifier installation and spacing
restrictions.
If you are installing digital or analog servo amplifiers in the same cabinet
as the control chassis (excluding the 9/440), then separate the amplifiers
and the control chassis with a grounded, metallic plate to shield the control
from electrical noise. You can use a cabinet with a center divider, where
the power transformers and servo amplifiers are installed on one side, and
the control, operator panel, and I/O modules installed on the other side.