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Connecting two-wire transmitters – Siemens Simatic S7-400 User Manual

Page 264

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Analog Modules

5-48

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Connecting Two-Wire Transmitters

+24 V

Sensor, for example,
pressure gauge

+

L +

M+
M

-

M+
M

-

M

Two-wire

transmitter

Two-wire

transmitter

+

M

P

P

M

ANA

* Connection required in the case of modules with M

ANA

*

Figure 5-10

Connecting Two-Wire Transmitters to an Isolated AI

SM 431; 8 x 13 Bit: Connecting Two-Wire Transmitters

Because the supply voltage for the two-wire transmitters is not fed by the SM 431;
8 x 13 Bit, you must supply the sensors separately with 24 V.

+24 V

Sensor, for example,
pressure gauge

+

MI

+

M–

Two-wire

transmitter

Two-wire

transmitter

+

M

ANA

M

V+

M

V+

M

I

+

M–

M

I

+

MI

+

M

P

P

Figure 5-11

Connecting Two-Wire Transmitters to an SM 431; 8 x 13 Bit

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