2-16 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q
2
CPU363, CPU364, and CPU374 Shield Grounding
The CPU363, CPU364, and CPU374 modules must be connected to frame ground at the slot where
they are installed. Each module comes with a grounding wire for this purpose. These modules do
not support or require the use of a grounding bracket. If the ring terminal on the grounding wire is
to be mounted to a painted surface, remove the paint under the ring terminal to ensure good contact,
or place a star lock washer between the ring terminal and the painted surface. See the next figure.
Note: The star lock washer method is suitable for a shield ground, but not suitable for a
safety ground.
MOUNT ON
GROUNDED
ENCLOSURE
USE 1 #6
MACHINE SCREW
STAB-ON
CONNECTOR
44A735970-001R01
BOTTOM
OF CPU MODULE
REMOVE PAINT UNDER
RING TERMINAL OR
INSTALL STAR LOCK
WASHER BETWEEN
RING TERMINAL AND
CPU363, CPU364,
or CPU374
#6 TAPPED HOLE
Figure 2-14. CPU 363, CPU364, or CPU374 - Attaching Ground Wire
Additional Modules with Shield Grounding Requirements
Some of the Series 90-30 Option modules, such as the FIP Remote I/O Scanner (IC693BEM330),
and DSM modules (IC693DSM302 and IC693DSM314) also have shield grounding requirements.
These modules come equipped with suitable grounding hardware. Please refer to each module’s
user’s manual for grounding instructions. Appendix G contains a product to publication cross-
reference to help you identify the correct manual.
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