Rockwell Automation Publication 1756-UM001M-EN-P - February 2012 27
Install the 1756-L7x Controller Chapter 1
Complete these steps to remove an ESM module from the controller.
1. Remove the key from the mode switch.
2. Use your thumb to press down on the black release and pull the ESM away
from the controller.
The next step depends on which of the following conditions applies to your
application.
• If you are removing the ESM from a powered 1756-L7x controller, go to
step 2
.
• If you are removing the ESM from a 1756-L7x controller that is not
powered, either because the chassis power is turned off or the
controller has been removed from a powered chassis, do not remove
the ESM immediately.
Wait until the controller’s OK status indicator transitions from Green to
Solid Red to OFF before you remove the ESM.
After the OK status indicator transitions to Off, go to step 2
.
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