F.24 Sm 331; Ai 4 X 15 Bit [Eex Ib]; 6Es7 331-7Rd00-0Ab0 - Siemens SIMATIC S7-400H System Manual

F.24 SM 331; AI 4 x 15 Bit [EEx ib]; 6ES7 331–7RD00–0AB0
The diagram below shows the connection of a 2-wire measuring transducer to two SM 331;
AI 4 x 15 bit [EEx ib]. The measuring transducer is connected to channel 1. Suitable Zener
diode BZX85C6v2 or 1N4734A (6.2 V because of the 50 Ohm input resistance)
Figure F-24
S7-400H
System Manual, 09/2007, A5E00267695-03
F.24 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
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