Troubleshoot the modules, Install or remove the module under power – Rockwell Automation 1756-CN2R ControlLogix ControlNet Interface Module Series A Installation Instructions User Manual
Page 19
ControlLogix ControlNet Bridge Module 19
Publication
1756-IN602A-EN-P - November 2005
Install or Remove the Module Under Power
You can install or remove the module while chassis power is applied
if you observe these precautions.
Troubleshoot the Modules
The modules have these diagnostic indicators:
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.
Module Status Display
See Pages 20 to 22.
Module Status Indicator
See Pages 20 to 22.
1756-CN2
1756-CN2R
Channel A BNC Connector
Channel B BNC Connector
ControlNet Channel Status Indicators
See Page 23.