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6ES7431-1KF10-0AB0

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Siemens 6ES7431-1KF10-0AB0 is a SIMATIC S7-400 SM 431 universal analog input module that converts voltage, current, resistance, thermocouple, and resistance-thermometer signals into PLC process values.
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Technical specifications for 6ES7431-1KF10-0AB0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7431-1KF10-0AB0
  • Product Family:
    Siemens Simatic S7-400
  • Product Type:
    SIMATIC S7-400 SM 431 Universal Analog Input Module
  • Stock:
    1
  • Analog Input Channels:
    8 for voltage or current
  • Resistance or Temperature Inputs:
    4
  • Supported Signal Types:
    Voltage, current, resistance, thermocouple and RTD
  • Resolution:
    14 bit; 16 bit with filtering
  • Backplane Current at 5 V:
    Maximum 600 mA
  • Power Loss:
    3.5 W
  • External Supply:
    24 V DC for two-wire transmitters
  • Maximum Transmitter Supply Current:
    200 mA
  • Temperature Compensation:
    External compensation supported
  • Line-Frequency Suppression:
    50 or 60 Hz
  • Maximum Shielded Cable Length:
    200 m
  • Thermocouple Cable Limit:
    50 m
  • Cable Limit at 80 mV or Less:
    50 m
  • Channel-to-Channel Isolation:
    Not provided
  • Measuring Section Isolation:
    Isolated from backplane
  • Diagnostic Interrupt:
    Supported by parameterization
  • Weight:
    1.7372 lbs (0.788 kg)
  • Estimated shipping dimensions:
    30.1x23.3x3.8cm
  • Tariff Code:
    85389091
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Sensor Modes Transmitter Supply Temperature Setup Filtering and Faults

Features:

  • Universal inputs accept voltage, current, resistance, thermocouple and RTD circuits.
  • An external 24 V path can supply assigned two-wire transmitters.
  • Filtering and compensation connect signal quality settings to the selected sensor type.
Each channel group is configured for the electrical behavior of its field circuit.

Low-level temperature signals use tighter cable and compensation rules.

Diagnostics depend on measuring mode, wiring and parameterization.

The Siemens 6ES7431-1KF10-0AB0 S7-400 SM 431 Universal Analog Input Module may remain available for quotation and support beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7431-1KF10-0AB0 S7-400 SM 431 Universal Analog Input Module Manuals,Datasheets,LinkImportant Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Matching each channel circuit to its configured measurement

  • Voltage input: The terminal pair measures the selected voltage range.
  • Current input: The loop current passes through the assigned current-measurement path.
  • Resistance input: Lead arrangement and excitation produce the resistance value.
  • Temperature input: Thermocouple or RTD parameters convert the sensor signal to temperature.

Powering two-wire loops without confusing supply paths

  • External source: The 24 V connection feeds assigned transmitter circuits.
  • Current limit: The combined transmitter load remains within the documented module maximum.
  • Loop return: Signal current returns through the selected input and reference terminals.
  • Backplane role: The S7-400 bus powers module electronics but not the external loop load.

Relating sensor wiring to compensation and cable limits

  • Thermocouple path: Low-level voltage represents the junction temperature.
  • Reference compensation: The selected external method corrects the cold-junction contribution.
  • RTD path: Resistance and lead configuration define the measured temperature.
  • Cable boundary: Sensor type and signal level determine the permitted shielded length.

Balancing conversion detail with response and diagnosis

  • Line suppression: The configured 50 or 60 Hz filter rejects matching interference.
  • Effective resolution: Filtering can increase resolution while extending conversion time.
  • Shared references: Channel grouping is considered because channels are not isolated from one another.
  • Diagnostic review: Raw value, status and a known input separate field faults from configuration errors.
Description
Serving mixed analog sensor circuits, Siemens 6ES7431-1KF10-0AB0 functions as the SIMATIC S7-400 SM 431 universal input module for voltage, current, resistance, thermocouple and resistance-thermometer signals. Its channel electronics convert each field-sensor type according to the corresponding S7-400 parameters.

For two-wire transmitters, 6ES7431-1KF10-0AB0 uses the external 24 V supply to feed the assigned current loops within the module limit. The loop source, terminal pair and configured current range must form one circuit, because the backplane supply does not replace the transmitter-power path.

Temperature measurement through 6ES7431-1KF10-0AB0 links the selected thermocouple or resistance-thermometer mode with its compensation and lead arrangement. External compensation corrects the reference-junction effect for the configured thermocouple path, while cable-length restrictions protect low-level signals from excessive error.

Filtering on 6ES7431-1KF10-0AB0 trades response time for higher effective resolution and suppression of the selected 50 or 60 Hz interference. Channel grouping and the absence of channel-to-channel isolation must be considered when signal references and shields are planned.

Diagnostic behavior of 6ES7431-1KF10-0AB0 depends on the measuring mode and parameterization. Raw values, channel status and a known field source should be compared before a reported wire break or range fault is assigned to the sensor, terminal block, cable or module.
Alternative Names
6ES74311KF100AB0 6ES7 431-1KF10-0AB0 6ES7431 1KF10 0AB0 Siemens 6ES7431-1KF10-0AB0 6ES7431-1KF10-0AB0 SM431 SM 431 6ES7431-1KF10-0AB0 6ES 7431 1KF10 0AB0 6ES7431/1KF10/0AB0
Technical notes
Sensor type, compensation method, two-wire transmitter supply, channel grouping, filtering, and cable limits must match the project configuration of Siemens 6ES7431-1KF10-0AB0.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does Siemens 6ES7431-1KF10-0AB0 report a wire break on a temperature channel?
Check the Siemens 6ES7431-1KF10-0AB0 sensor type, terminal assignment, lead continuity, compensation circuit, channel mode, range, and diagnostic parameterization.
When is the external 24 V supply required for 6ES7431-1KF10-0AB0?
The 6ES7431-1KF10-0AB0 uses external 24 V DC when its assigned two-wire transmitter circuits require loop power within the documented current limit.
How does filtering change Siemens 6ES7431-1KF10-0AB0 measurement behavior?
Filtering on Siemens 6ES7431-1KF10-0AB0 can improve effective resolution and suppress 50 or 60 Hz interference, but it also changes conversion and response timing.
What should be checked when 6ES7431-1KF10-0AB0 thermocouple values drift?
For 6ES7431-1KF10-0AB0, inspect thermocouple type, polarity, compensation method, terminal temperature, shield, cable length, grounding, and configured line-frequency suppression.
Are the input channels of Siemens 6ES7431-1KF10-0AB0 isolated from one another?
No. Siemens 6ES7431-1KF10-0AB0 isolates the measuring section from the backplane but does not provide channel-to-channel isolation, so reference planning remains important.