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Siemens Simatic S7-400 User Manual

Page 324

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Analog Modules

5-108

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Block Diagram of the SM 431; AI 16

16 Bit

Bus S7-400

Bus control

A

D

CH0

CH1

+ 15 V

+ 5 V

0 V

–15 V

+ 5 V

0 V

I

const

Diagnostics

in

L+ loop

L +

M

PGA

Multiplexer

Opto relay

CH14

CH15

Meas. range

Meas. range

module 0

module 7

Signal

jumpering

Bus S7-400

Figure 5-35 Block Diagram of the SM 431; AI 16 x 16 Bit

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