Rockwell Automation 1756-Enxxx_Ewxxx EtherNet/IP Modules Installation Instructions - Manual (Page 53)

Rockwell Automation Publication ENET-IN002F-EN-P - January 2014 53
Install a 1768 EtherNet/IP Communication Module Chapter 2
2. Open the DIN rail latches of the communication module and the module
directly to the left of communication module.
3. Slide the communication module and other modules to the right.
4. Open the DIN rail latches of the controller.