Siemens Simatic S7-400

Selected measuring method Measuring range Description
4DMU: Current
(4-wire transducer)
4 to 20 mA
± 20 mA
The digitized analog values are listed in the section "Repre‐
sentation of analog values for output channels in the current
measuring range".
R-4L: Resistance
(4-conductor connection)
600 Ω The digitized analog values are listed in the section "Repre‐
sentation of analog values for output channels in the resist‐
ance-type sensor range".
Default
The "voltage" measuring method and "± 10 V" measuring range are set by default at the
module. You can use this combination of measuring method and measuring range without
configuring the SM 431; AI 8 x 13 Bit in STEP 7 .
5.20 Analog input module SM 431; AI 8 x 14 Bit (6ES7431-1KF10-0AB0)
5.20.1 Features
Overview
The analog input module SM 431; AI 8 x 14 bit has the following features:
● 8 inputs for current and voltage measurement
● 4 inputs for resistance and temperature measurement
● Various measuring ranges, adjustable in parallel
● Resolution 14 bits
● Particularly suited to temperature measurement
● Temperature sensor types configurable
● Linearization of sensor characteristic curves
● Supply voltage: 24 V DC only required for connection of 2-wire transducers
● Analog section isolated from the CPU
● Maximum permitted common mode voltage between channels or between channel and
central grounding point 120 V AC
Note
"Wire break" diagnostics
The diagnosis "wire break" can be configured for "voltage" measurement for this module,
but is not evaluated by the module in that measurement type.
Analog modules
5.20 Analog input module SM 431; AI 8 x 14 Bit (6ES7431-1KF10-0AB0)
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08 237