Siemens SIMATIC S7-400 Reference Manual page 309

Connection of encoder
● at measuring voltage
● for current measurement as 4-wire transducer
Characteristic curve linearization
● For thermocouples
Temperature compensation
● Internal temperature compensation
User data in engineering format
The 6ES7431-7KFOO-0AB0 does not support the values defined for S7 for the overreaches and sub-
1
ranges of thermocouples. Depending on the situation, underflow (32768) or overflow (327767) is dis‐
played when the module reaches the end of the thermocouple operating range defined for S7.
Operation of thermocouples above the specified temperatures is possible.
2
The specified accuracy is at the lower end of the range and is better at higher temperatures.
The accuracy of the thermocouple module at temperatures other than those specified can be calculated
using the limit values for the accuracy of input voltage and emf/°C of the thermocouple at the required
temperature.
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
5.25 Analog input module SM 431; AI 8 x 16 Bit (6ES7431-7KF00-0AB0)
Possible
Possible
Types B, N, E, R, S, J, L, T, K, U
Yes, configurable
Possible
Degrees C/ degrees F
Analog modules
309