Spectrum Controls 1746sc-INO4vi - Manual (Page 19)

Chapter 2: Installing And Wiring Your Module 9
To insert your module into the rack, follow these steps:
1. Align the circuit board of your module with the card guides at the top
and bottom of the chassis.
2. Slide your module into the chassis until both top and bottom retaining
clips are secure. Apply firm even pressure on your module to attach it
to its backplane connector. Never force your module into the slot.
Cover all unused slots with the Card Slot Filler, Allen-Bradley part
number 1746-N2.
To remove your module, press the retaining clips at the top and bottom of
your module and slide it out.