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Installing 575 System Hardware SIMATIC 545/555/575 System Manual
4.13 Wiring the Fault Relay
The fault relay on the 575 CPU is a male 9-pin, D-shell connector that can
be used with a low-voltage safety chain. Port pinouts and wiring are shown
in Figure 4-22.
1
2
3
4
5
6
7
8
9
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Figure 4-22 Fault Relay Wiring
Two circuits are available, as shown in Figure 4-23.
12
34
Circuit 1
Circuit 2
Figure 4-23 Normally Open Contacts
See Section 2.3 for an explanation of the operation of the fault relay and
application examples.
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