Connecting Two-Wire Transmitters To An Isolated Ai - Siemens SIMATIC S7-300 Reference Manual

Analog Modules
Connecting 2-wire transmitters
Sensor,
for example,
pressure gauge
Figure 4-12
When the supply voltage L+ is fed from the module, you must assign parameters
to the two-wire transmitter as a four-wire transmitter in STEP 7.
Sensor,
for example,
pressure gauge
P
Figure 4-13
Connecting four-wire transmitters
Sensor,
for example,
pressure gauge
Figure 4-14
4-52
L+
M
Two-wire
+
transmitter
P
–
+
Two-wire
–
P transmitter

Connecting two-wire transmitters to an isolated AI

L+
M
2-wire +
trans
–
mitter
Connecting two-wire transmitters supplied from L+ to an
isolated AI
L+
M
+
P
–
+
P
–
L+ M
Connecting four-wire transmitters to an isolated AI
M+
M–
M+ ADC
M–
M
ANA
M+
ADC
M–
M
ANA
M+
M–
M+
ADC
M–
M
ANA
Programmable Logic Controllers S7-300 Module Data
Backplane
bus
Backplane
bus
Backplane
bus
A5E00105505-03