Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 36)

Install the QDC Module
Chapter 2
2-10
Figure 2.5
Shielding SingleĆended Outputs
Connect the cable shield
to earth ground at the valve
amplifier
QDC Module Output
9
8
Customer Valve Amplifier
Input
Ground
Chassis Ground
17182
+
–
ground the cable shields to a low-impedance earth ground of less than
1/8 ohm
do not connect any ground to input common (terminal 14) except as
specified below under Grounding Exceptions
place high-voltage class A wiring and low-voltage class B wiring in
separate grounded conduits
in parallel runs, separate the class A and B conduit by at least 1 foot
where conduit runs must cross, cross them at right angles
For additional grounding recommendations, refer to the Allen-Bradley
Programmable Controller Wiring and Grounding Guidelines (publication
1770-4.1).
Exceptions
If you experience unacceptable electrical noise interference, then try one or
both of the following alternative grounding connections:
connect the input cable shield to input common (terminal 14) after
disconnecting the shield from the transducer
connect the output cable shield to output common (terminal 8, 6, 4,
and/or 2) after disconnecting it from the valve amplifier