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Siemens 6ES7431-1KF00-0AB0 — Analog Input Modules

Siemens 6ES7431-1KF00-0AB0 SM 431 Analog Input Module, 8 AI, 13 bit

MPN6ES7431-1KF00-0AB0
NRND

Siemens 6ES7431-1KF00-0AB0 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.

$1,442.00Ref. price · indicative, final on quote
Siemens 6ES7431-1KF00-0AB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jun 2026

Specifications

6ES7431-1KF00-0AB0 — Inputs & Signal Ranges
ParameterValue
Number of analog inputs8
Current input rangeYes
Voltage input rangeYes
Resistance measuring rangesYes
RTD support (resistance thermometer)No
Thermocouple support (types)No
Input range: 4 to 20 mAYes
Input range: -10 to +10 VYes
Input range: 0 to 600 OhmYes
Current measurement: 2-wire transducerYes; with external transmitter supply
Current measurement: 4-wire transducerYes
Input resistance (4 to 20 mA)80 Ω
Input resistance (-10 to +10 V)200 kΩ
Permissible input voltage, max. (destruction limit)50 V
Permissible input current, max. (destruction limit)50 mA; 40 mA continuous
Max. shielded signal cable length200 m
6ES7431-1KF00-0AB0 — Measurement Performance
ParameterValue
Resolution (bit incl. sign), max.13 bit
Temperature measurement error (±)0.02 %/K; ±0.02 %/K in impedance measuring range; ±0.007 % in all other measuring ranges
Voltage measurement error (±)0.7 %; 0.7% at ±1 V; 0.4% at ±10 V; 0.5% at 1 to 5 V
Current measurement error (±)0.7 %; at ±20 mA, 4 to 20 mA
Interference voltage suppression (at interference frequency)50 / 60 Hz
6ES7431-1KF00-0AB0 — Diagnostics & Monitoring
ParameterValue
Diagnostics functionNo
6ES7431-1KF00-0AB0 — Isolation
ParameterValue
Isolation: channels to backplane busYes
Isolation: between channelsNo
Isolation test voltage2 120 V DC between bus and analog part; 500 V DC between bus and local ground; 2 120 V DC between analog part and local ground
6ES7431-1KF00-0AB0 — Power
ParameterValue
Rated value (DC)not necessary
Power loss, typ.1.8 W
6ES7431-1KF00-0AB0 — Mechanical
ParameterValue
Width25 mm
Height290 mm
Depth210 mm
Weight, approx.500 g

Product details

Overview

The 6ES7431-1KF00-0AB0 is a Siemens SM 431 analog input module for the SIMATIC S7-400 system, providing 8 isolated analog inputs with 13-bit resolution across voltage, current, and resistance measuring ranges. It draws 1.8 W from the backplane bus and occupies a single slot width of 25 mm, fitting into the standard S7-400 rack.

Temperature error is specified at 0.02 %/K across most ranges, with a tighter ±0.007 % in impedance measuring ranges. The module does not include onboard diagnostics, so fault detection relies on the CPU or external monitoring.

The SM 431 series sits in the S7-400 analog input family, offering a balance of channel count and resolution for medium-density applications. The 6ES7431-1KF00-0AB0 is specified when the application requires resistance measurement alongside standard voltage and current inputs, without the higher channel count or thermocouple capability of other SM 431 variants.

MPN
6ES7431-1KF00-0AB0