Siemens SIMATIC S7-400H - SM 331; AI 4 X 15 Bit [Eex Ib]; 6 ES7 331-7 RD00-0 AB0

Connection examples for redundant I/Os
E.25 SM 331; AI 4 x 15 Bit [EEx ib]; 6ES7 331–7RD00–0AB0
S7-400H
System Manual, 03/2012, A5E00267695-11
485
E.25 SM 331; AI 4 x 15 Bit [EEx ib]; 6ES7 331–7RD00–0AB0
The diagram below shows the connection of a 2-wire transmitter to two SM 331; AI 4 x 15 Bit
[EEx ib]. The transmitter is connected to channel 1. Suitable Zener diode: BZX85C6v2.
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Figure E-25 Example of an interconnection with SM 331, AI 4 x 15 Bit [EEx ib]