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The following example illustrates connections for an A7B Thumbwheel Switch.
1
3
5
7
9
11
13
15
COM
0
2
4
6
8
10
12
14
COM

ID212 Input Unit

Switch no. 8

1
3
5
7
9
11
13
15
COM
0
2
4
6
8
10
12
14
DC
OD212
1248

76 5 4 32 1C

Output Unit

A7B

Thumbwheel

Switch

Note The data read signal is not required in the example.

The inputs must be connected to a DC Input Unit with 8 or more input points andthe outputs must be connected from a Transistor Output Unit with 8 or more out-put points.
Advanced I/O Instructions Section 5-28