Sm 421; Di 16 X Dc 24 V, 6Es7 421-7Bh01-0Ab0 - Siemens SIMATIC S7-400H System Manual

E.11 SM 421; DI 16 x DC 24 V, 6ES7 421–7BH01–0AB0
The diagram below shows the connection of two redundant encoders pairs to two
SM 421; D1 16 x 24 V. The encoders are connected to channel 0 and 8.
Figure E-11
S7-400H
System Manual, 03/2012, A5E00267695-11
Example of an interconnection with SM 421; DI 16 x 24 V
Connection examples for redundant I/Os
E.11 SM 421; DI 16 x DC 24 V, 6ES7 421–7BH01–0AB0
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