Rockwell Automation 1772-LV,D17726.6.1 A and I MNL MINI-PLC-2/15 PROCESSO - Manual (Page 44)

Assembly and Installation
Chapter 3
3Ć24
When a pair of I/O Modules (a Module group) is seated, the Module Locking
Latch at the the top of the I/O Chassis is snapped down to secure the I/O
Module (Figure 3.15). The Field Wiring Arm is then pivoted up and snapped
onto the wiring arm locking tab.
Figure 3.23
Installing Processor Module
4 slot I/O
Processor Module
inserted here
Module Locking Latch
10841ĆI