Rockwell Automation 1756-DNB ControlLogix DeviceNet Scanner Module Installation Instructions - Manual (Page 25)

ControlLogix DeviceNet Scanner Module 25
Publication 1756-IN566D-EN-P - June 2008
Install or Remove the Module Under Power
You can install or remove this module while chassis power is applied.
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.