Rockwell Automation 1756-HYD02 ControlLogix Hydraulic Servo Module - Manual (Page 15)

Publication 1756-UM525A-EN-P - June 2003 15
Installing the 1756-HYD02 Module Chapter 2
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, keyed 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
will not mount on the module.
Use a unique keying pattern for each slot in the chassis.
1. Insert the U-shaped band with the long side near the terminals.
2. Push the band onto the module until it snaps in place.
3. 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.
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