ProSoft Technology CLX-APACS - Manual (Page 11)

QTS-CLX-APACS Page 5
You can install multiple QTS-CLX-APACS modules in the same chassis.
Insert the Module in the Chassis
The ControlLogix module is designed to be installed or removed while chassis power is
applied.
WARNING!
ATTENTION: 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.