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Grounding considerations
This product is intended to be mounted to a well-grounded mounting surface such
as a metal panel. Additional grounding connections from the controller's mounting
tabs or DIN rail (if used), are not required unless the mounting surface cannot be
grounded. Refer to Industrial Automation Wiring and Grounding Guidelines,
Allen-Bradley publication 1770-4.1, for additional information.
ATTENTION
Make RS-232 Connections to the Controller
Connect the 9-pin female end of the serial cable to the serial
port of the controller.
WARNING
This product is grounded through the DIN rail to chassis ground.
Use zinc plated yellow-chromate steel DIN rail to assure proper
grounding. The use of other DIN rail materials (e.g. aluminum,
plastic, etc.) that can corrode, oxidize, or are poor conductors,
can result in improper or intermittent grounding.
If you connect or disconnect the serial cable
with power applied to this module or the
serial device on the other end of the cable,
an electrical arc can occur. This could cause
an explosion in hazardous location
installations.
Be sure that power is removed or the area is
nonhazardous before proceeding.
1769-L31 CompactLogix™ Controller
Publication 1769-IN069A-EN-P - March 2004
13
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