Rockwell Automation 1756-L6x_L7x ControlLogix System User Manual - Manual (Page 23)

Rockwell Automation Publication 1756-UM001O-EN-P - October 2014 23
Install the 1756-L7x Controller Chapter 1
Insert the Controller
into the Chassis When installing a ControlLogix controller, you can do the following:
• Place the controller in any slot.
• Use multiple controllers in the same chassis.
You can install or remove a ControlLogix controller while chassis power is on and
the system is operating.
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
controller and its mating connector on the chassis. Worn contacts may create
electrical resistance that can affect controller operation.
ATTENTION: Prevent Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause internal
damage and affect normal operation. Follow these guidelines when you handle
this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.
IMPORTANT The ESM begins charging when one of these actions occurs:
• The controller and ESM are installed into a powered chassis.
• Power is applied to the chassis that contains a controller with the ESM
installed.
• An ESM is installed into a powered controller.
After power is applied, the ESM charges for up to two minutes as indicated by
CHRG or ESM Charging on the status display.