Siemens M7-400, S7-400 Connecting Four-Wire Transmitters , SM 431; 8 x 13 Bit: Connecting Four-Wire Transmitters

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