Rockwell Automation 1756-SPESMNRMXT GuardLogix Controllers User Manual - Manuel (Page 28)

28 Rockwell Automation Publication 1756-UM020I-EN-P - August 2012
Chapter 2 Install the Controller
Follow these steps to install a new 1756-BA2
battery.
1. Insert the battery as shown.
2. Connect the battery:
+ Red
- Black
3. Write the date you installed the
battery on the battery label and attach
the label to the inside of the controller
door.
See Appendix B for more information on
maintaining the battery.
Install the Controller into the
Chassis You can install or remove a controller while chassis power is on and the system is
operating.
1. Insert the key into the primary controller.
2. Turn the key to the PROG position.
The safety partner does not have a keyswitch.
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2
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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 contact may create
electrical resistance that can affect module operation.
IMPORTANT For 1756-L7xS controllers and 1756-L7SP safety partners, 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.
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