Sm 331; Ai 4 X 15 Bit [Eex Ib]; 6Es7 331-7Rd00-0Ab0 - Siemens SIMATIC S7-400H System Manual

Fault-tolerant systems

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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.

System Manual, 03/2012, A5E00267695-11

E.25 SM 331; AI 4 x 15 Bit [EEx ib]; 6ES7 331–7RD00–0AB0

Example of an interconnection with SM 331, AI 4 x 15 Bit [EEx ib]

Connection examples for redundant I/Os