
28 Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
Chapter 1 Install the 1756-L7x Controller
4. Remove the SD card and close the door.
Install the ESM
To install an ESM in the 1756-L7x controller, complete these steps.
1. Align the tongue-and-groove slots of the ESM and controller.
2. Slide the ESM back until it snaps into place.
The ESM begins charging after installation. The following status messages
indicate charging status:
• ESM Charging
• CHRG
After you install the ESM, it can take up to 15 seconds for the charging
status messages to display.
ATTENTION: To avoid potential damage to the product when inserting the
ESM, align it in the track and slide forward with minimal force until the ESM
snaps into place.
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