Siemens Simatic S7-400 - Page 290

Measuring ranges
You set the measuring ranges by means of the measuring range modules on the module and
the "Measuring type" parameter in STEP 7.
Table 5-66 Measuring ranges of the SM 431; AI 16 x 16 Bit
Selected measuring method Measuring range
(type of sensor)
Measuring range module set‐
tings
Description
V: Voltage ± 25 mV
± 50 mV
± 80 mV
± 250 mV
± 500 mV
± 1 V
± 2.5 V
± 5 V
1 to 5 V
± 10 V
A The digitized analog values
are listed in the section "Rep‐
resentation of analog values
for analog input channels" in
the voltage measuring range.
2DMU: Current (2-wire sen‐
sor)
4 to 20 mA D To supply these transducers
with current you must con‐
nect 24 V to the L+ and M
front connector terminals.
The digitized analog values
are listed in the section "Rep‐
resentation of analog values
for analog input channels" in
the current measuring range.
4DMU: Current (4-wire sen‐
sor)
± 5 mA
± 10 mA
0 to 20 mA
4 to 20 mA
± 20 mA
C The digitized analog values
are listed in the section "Rep‐
resentation of analog values
for analog input channels" in
the current measuring range.
R-3L: Resistance
(3-conductor connection)
300 Ω
600 Ω
6000 Ω
(maximum 5000 Ω)
A The digitized analog values
are listed in the section "Rep‐
resentation of analog values
for analog input channels" in
the resistance measuring
range.
R-4L: Resistance
(4-conductor connection)
48 Ω
150 Ω
300 Ω
600 Ω
6000 Ω
(maximum 5000 Ω)
TC-L: Thermocouple (linear)
(Temperature measurement)
Type B
Type N
Type E
Type R
Type S
Type J
Type L
Type T
Type K
Type U
A The digitized analog values
are listed in the section "Rep‐
resentation of analog values
for analog input channels" in
the temperature range.
Analog modules
5.23 Analog input module SM 431; AI 16 x 16 Bit (6ES7431-7QH00-0AB0)
S7-400 Automation System Module Data
290 Reference Manual, Ausgabe 11/2016, A5E00850736-08