Connection examples for redundant I/Os
E.4 SM 321; DI 8 x AC 120/230 V, 6ES7 321–1FF01–0AA0
S7-400H
464 System Manual, 03/2012, A5E00267695-11
E.4 SM 321; DI 8 x AC 120/230 V, 6ES7 321–1FF01–0AA0
The diagram below shows the connection of two redundant encoders to two SM 321; DI 8
AC 120/230 V. The encoders are connected to channel 0.
1
1
9
Figure E-4 Example of an interconnection with SM 321; DI 8 x AC 120/230 V
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