Connection examples for redundant I/Os
E.10 SM 421; DI 32 x UC 120 V, 6ES7 421–1EL00–0AA0
S7-400H
470 System Manual, 03/2012, A5E00267695-11
E.10 SM 421; DI 32 x UC 120 V, 6ES7 421–1EL00–0AA0
The diagram below shows the connection of a redundant encoder to two SM 421; DI 32 x
UC 120 V. The encoder is connected to channel 0.
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98&
Figure E-10 Example of an interconnection with SM 421; DI 32 x UC 120 V
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