Rockwell Automation 1768-CNxxx ControlNet Communication Modules - Manual (Page 17)

Rockwell Automation Publication CNET-IN005C-EN-P - July 2014 17
Install a 1756 ControlNet Communication Module Chapter 1
Remove the Module You can install or remove this module while chassis power is applied.
To remove or replace the module, use this procedure.
1. Push on the upper and lower module tabs to disengage them.
2. Slide the module out of chassis.
The figure shows the removal of a 1756-CN2RXT module.
WARNING: When you insert or remove the module while backplane power is
on, 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.
Repeated electrical arcing causes excessive wear to contacts on both the module
and its mating connector. Worn contacts may create electrical resistance that can
affect module operation.
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