Rockwell Automation 1756-IH16ISOE ControlLogix Sequence of Events Module - Manual (Page 29)

Publication 1756-UM528A-EN-P - April 2004
Installing the Sequence of Events Module 3-3
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 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 does 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 in
place.
Figure 3.3 .
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.
Figure 3.4
IMPORTANT
When keying your RTB and module, you must
begin with a wedge-shaped tab in position #6 or
#7.
20850-M
U-shaped
Keying Band
20851–M
1 2
0
3
4 5
6
7
Module side of RTB
Wedge–shaped
Keying Tab