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Keying
Plastic keying bands shipped with each I/O chassis provide an easy
method for keying and I/O slot to accept only one type of module. Use of
the keying bands is strongly recommended.
The module is slotted in two places on its rear edge. The position of the
keying bands on the backplane connector must correspond to the slots to
allow insertion of the module so that only the servo interface module will
fit in this slot.
Refer to Figure 2.4. Snap the keying bands on the upper backplane
connectors between these numbers printed on the backplane:
8 and 10
16 and 18
Needlenose pliers can be used to insert or remove keying bands.
Figure 2.4
Keying Diagram
First Backplane
Connector For
I/O Modules
Keying
Bands
Chapter 2
Component Interfacing, Module
Preparation, and Installation
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
2 2
2 4
2 6
2 8
3 0
3 2
3 4
3 6
First
Backplane
Connector
For I/O
Modules
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
2 2
2 4
2 6
2 8
3 0
3 2
3 4
3 6
2 7
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