Omron SYSMAC C500, Installation Manual

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Specifications
Appendix B
67
be avoided, use shielded cables when wiring the DC Input Unit. Be
sure to keep the total length of the wires less than 10 m.
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 access different combina-
tions of words and bits, the digital switches can access different combinations
of words and bits. For example, the combination of switch no. 1 and point 00
access word bit 00, word n.
However, 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.
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
8 7 6 5 4 3 2 1
+
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
24 VDC
D C B A COM
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
NC
Switch no. 8 7 6 5 4 3 2 1
The table below shows the combinations made possible when the digital
switches are wired as shown in the figure above.
Point Number 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
word n
Switch no. 4 Switch no. 3 Switch no. 2 Switch no. 1
0 1 0 0 0 0 1 1 0 0 1 1
0 0 0 1
STB 1 STB 0
word n + 1 Switch no. 8 Switch no. 7 Switch no. 6 Switch no. 5
word n + 1
1 0 0 0 0 1 1 1 0 1
1
0 0 1 0 1
STB 3 STB 2