3G5A2-RPT01-PE datasheet(130/182 Pages) OMRON

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Appendix B

Specifications

117

Connection Example 2 (Digital Switches)

This example shows how the ID212 DC Input Unit can be wired using digital switches. Just as the keys on the

keyboard can turn ON different combinations of bits, the digital switches can control different combinations of bits.

For example, the combination of inputs on switch no. 1 and input point 00 turn ON bit 00 of word n. (For the sake of

simplicity, the figure below shows the digital switches wired to control 32 bits instead of 64 bits as was shown in

Example 1.) Wire STB 4, STB 5, STB 6, and STB 7 to access an additional 32 bits.

24 VDC

DATA 0

DATA 1

DATA 2

DATA 3

DATA 4

DATA 5

DATA 6

DATA 7

COM (+24)

STB 0

STB 1

STB 2

STB 3

STB 4

STB 5

STB 6

STB 7

COM (0 V)

+24 VDC

8765

432

D C B A COM

Switch no.

8765

432

The following table shows the combinations enabled by wiring digital switches as shown.

Terminal Number

Word n

Switch no. 4

Switch no. 3

Switch no. 2

Switch no. 1

STB 1

STB 0

Word n + 1

Switch no. 8

Switch no. 7

Switch no. 6

Switch no. 5

STB 3

STB 2

These pulses are input to bits 0 through 7 of word n.

32 ms

4 ms

Data 0 through

STB 0

STB 1

STB 2

STB 3

STB 4

STB 5

STB 6

STB 7

Timing

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