Rockwell Automation 1756-Lx_Mx ControlLogix Controller and Memory Board Installation Instructions - Manual (Page 28)

28 ControlLogix Controller and Memory Board
Publication 1756-IN101L-EN-P - June 2008
Installing the Controller into the Chassis
When you install a ControlLogix controller, you can:
• 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.
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.
1. Insert the key into the controller.
2. Turn the key to the PROG position.
3. Align the circuit board with the top and bottom guides in the chassis.
4. Slide the module into the chassis, making sure it is flush with the
power supply or other modules and the top and bottom latches are
engaged.
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.