Spectrum Controls 1756sc-IF8u - Manual (Page 25)

Chapter 2: Installing And Wiring Your Module
13
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.
Figure 2.1. Module insertion into a rack
2. Key the RTB in positions that correspond to unkeyed module positions.
Insert the wedge-shaped tab on the RTB with the rounded edge first.
Push the tab onto the RTB until it stops.
Keying the Removable Terminal Block
Key the RTB to prevent inadvertently connecting the incorrect RTB to
your module.
When the RTB mounts onto the module, keying positions will match up.
For example, if you place a U-shaped keying band in position #4 on the
module, you cannot place a wedge-shaped tab in #4 on the RTB or your
RTB will not mount on the module.
We recommend that you use a unique keying pattern for each slot in the
chassis.
1. Insert the U-shaped band with the longer side near the terminals. Push
the band onto the module until it snaps into place.