Rockwell Automation 1738-AENTR, Series B POINT I/O and ArmorPOINT I/O Dual Port EtherNet/IP Adapters User Manual - Manual (Page 22)

14 Rockwell Automation Publication 1734-UM017B-EN-P - October 2013
Chapter 2 Install Your POINT I/O or ArmorPOINT I/O Adapter
3. Push the module down until it engages the latching mechanism.
You hear a clicking sound when the module is properly engaged. The
locking mechanism locks the I/O module to the I/O module mounting
base.
Remove ArmorPoint I/O Modules
To remove a module from its mounting base:
1. Put a flat-blade screwdriver into the slot of the orange latching mechanism.
2. Push the screwdriver toward the I/O module to disengage the latch.
The module lifts up off the base.
3. Pull the module off the base.