Siemens SIMATIC S7-400 Reference Manual page 246

Analog modules
5.20 Analog input module SM 431; AI 8 x 14 Bit (6ES7431-1KF10-0AB0)
Sensor connection
● For voltage measurement
● For current measurement
● For resistance measurement
● Load of 2-wire transducer
Characteristic curve linearization
● For thermocouples
● For resistance thermometers
Temperature compensation
● Internal temperature compensation
● External temperature compensation with
● External temperature compensation with Pt 100
● Compensation for definable reference junction
Technical unit for temperature measurement
246
– As 2-wire transducer
– As 4-wire transducer
– With 2-wire connection
– With 3-wire connection
– With 4-wire connection
compensating box
temperature
Possible
Possible
Possible
Possible; line resistance is also measured
Possible
Possible
Maximum 750 Ω
Configurable
Type B, R, S, T, E, J, K, U, L, N
Pt 100, Pt 200, Pt 500, Pt 1000,
Ni 100, Ni 1000
Yes, configurable
No
Possible
Possible
Possible
Degrees Celsius
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08