5.25.3 Measuring methods and measuring ranges of SM 431; AI 8 x 16 Bit
Measuring methods
You can set the measuring method at the input channels:
● Voltage measurement
● Current measurement
● Temperature measurement
You perform the setting with the "measuring method" parameter in STEP 7.
Unused channels
For unused channels, set the "measuring method" parameter to "deactivated". This reduces
the module's cycle time.
Measuring ranges
Set the measuring ranges by means of the "Measuring range" parameter in STEP 7.
Table 5-74 Measuring ranges of the SM 431; AI 8 x 16 Bit
Selected measuring method Measuring range Description
V: Voltage ±25 mV
±50 mV
±80 mV
±100 mV
±250 mV
±500 mV
±1 V
±2.5 V
±5 V
±10 V
from 1 to 5 V
The digitized analog values are listed in the sec‐
tion "Representation of analog values for analog
input channels" in the voltage measuring range.
4DMU: Current (4-wire sensor) ±3.2 mA
±5 mA
±10 mA
±20 mA
from 0 to 20 mA
from 4 to 20 mA
The digitized analog values are listed in the sec‐
tion "Representation of analog values for analog
input channels" in the current measuring range.
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
The digitized analog values are listed in the sec‐
tion "Representation of analog values for analog
input channels" in the temperature range.
Analog modules
5.25 Analog input module SM 431; AI 8 x 16 Bit (6ES7431-7KF00-0AB0)
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08 315
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