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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
A5E00105492-03
7-11
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Table 7-6 Wiring the front connector
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1. Thread the accompanying strain relief for
the cable line into the front connector.
-
Do you want to exit the cables at the bottom of the module?
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Starting at terminal 20, work your way down
to terminal 1.
Starting at terminal 40 or 20, wire the connector,
working in alternating passes from terminals 39,
19, 38, 18 etc. until you have reached
terminals 21 and 1.
2.
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Starting at terminal 1, work your way up to
terminal 20.
Starting at terminal 1 or 21, wire the connector,
working in alternating passes from terminals 2,
22, 3, 23 etc. until you have reached
terminals 20 and 40.
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Screw-tighten unused terminals also.
4. - Place the accompanying strain relief around the
cable line and the front connector.
5. Pull the strain relief for the cable line tight. Push in the strain relief to the left to improve
utilization of the available cable space.
-
1
1
1
2
1
1
1
2
1
1
4
3
The work step numbers are shown in the figure above
Thread the strain relief.
Wire the terminals.
to Wire the terminals.
Tighten the strain relief.
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