
Analog modules
5.23 Analog input module SM 431; AI 16 x 16 Bit (6ES7431-7QH00-0AB0)
S7-400 Automation System Module Data
302 Reference Manual, Edition 09/2009, A5E00850736-06
Resistance thermometer
Pt 100 / 1 MΩ
Pt 200 / 1 MΩ
Pt 500 / 1 MΩ
Pt 1000 / 1 MΩ
Ni 100 / 1 MΩ
Ni 1000 / 1 MΩ
Permissible voltage at voltage input (destruction limit) Max. 18 V continuous;
75 V for 1 ms (cycle factor 1 : 20)
Permissible current at current input (destruction limit) 40 mA
Connection for signal sensors
For voltage measurement
Supported
For current measurement
– As 2-wire transducer
– As 4-wire transducer
Supported
Supported
For resistance measurement
– With 2-conductor connection
–
– With 3-conductor connection
– With 4-conductor connection
Supported;
Cable resistances are also measured
Supported
Supported
Load of the 2-wire transducer
Max. 750 Ω
Characteristic linearization Programmable
For thermocouples
Types B, R, S, T, E, J, K, U, L, N
Of resistance thermometers
Pt 100, Pt 200, Pt 500, Pt 1000, Ni 100,
Ni 1000
Temperature compensation Yes, programmable
Internal temperature compensation
No
External temperature compensation with
compensating box
Supported
External temperature compensation with Pt 100
Supported
Compensation for definable reference junction
temperature
Supported
Technical unit of temperature measurements Degrees Celsius
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