Allen-Bradley DeviceNet 1756-DNB - Install or Remove the Module under Power

24 Rockwell Automation Publication DNET-IN001B-EN-P - January 2012
Chapter 1 Install a 1756 DeviceNet Communication Module
Install or Remove the
Module Under Power
You can install or remove this module while chassis power is applied.
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.
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 the chassis.
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.
IMPORTANT
If you want to replace an existing module with an identical one, and you
want to resume identical system operation, you must install the new
module in the same slot.
31590-M
31591-M