Siemens Simatic M7-400 Reference Manual page 265

Connecting Four-Wire Transmitters
Sensor,
for example,
pressure gauge
* Connection required in the case of modules with M
Figure 5-12
SM 431; 8 x 13 Bit: Connecting Four-Wire Transmitters
To ensure that the permissible value for U
the M– cables to M
Sensor, for example,
pressure gauge
Figure 5-13
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
P
Four-wire
transmitter
P
Connecting Four-Wire Transmitters to an AI
.
ANA
P
Four-wire
transmitter
P
U
H
Connecting Four-Wire Transmitters to an SM 431; 8 x 13 Bit
+
–
+
–
U
H
* *
ANA
is not exceeded, you must connect
CM
M
V+
M +
I
+
MI
+
–
M–
M
+ V+
M +
I
–
M +
I
M–
M
Analog Modules
M+
M–
M+
M–
M
ANA
5-49