Siemens 6ES7431-1KF10-0AB0
SM 431 analog input, 8 AI, 14 bit, U/I/R/thermocouple/RTD
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Siemens SIMATIC S7-400 SM 431 analog input module: 8 isolated inputs for voltage, current, resistance, thermocouples and resistance thermometers, 14-bit resolution.
- Manufacturer
- Siemens
- Manufacturer part no.
- 6ES7431-1KF10-0AB0
- Product family
- SIMATIC S7-400 PLC CPUs, I/O and Function Modules
- Type
- Analog input module
- Category
- PLCs and I/O › Analogue I/O modules
- Lifecycle
- Discontinued
- OEM successor
- Not stated
- Technical datasheet
- Data sheet
Technical specifications
- Manufacturer
- Siemens
- Manufacturer part no.
- 6ES7431-1KF10-0AB0
- Type
- Analog input module
- Application
- Analog input module
- Used with
- SIMATIC S7-400 rack
- Load voltage L+ / Rated value (DC)
- 24 V; Only required for supplying 2-wire transmitters
- Load voltage L+ / Reverse polarity protection
- Yes
- Input current / from load voltage L+ (without load), max.
- 200 mA; for 8 connected, fully controlled 2-wire transmitters
- Input current / from backplane bus 5 V DC, max.
- 600 mA
- Power loss, typ.
- 3.5 W
- Number of analog inputs
- 8
- Number of analog inputs / For voltage/current measurement
- 8
- Number of analog inputs / For resistance measurement
- 4
- Analog inputs / permissible input voltage for voltage input (destruction limit), max.
- 18 V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20)
- Analog inputs / permissible input current for current input (destruction limit), max.
- 40 mA; Permanent
- Analog inputs / Constant measurement current for resistance-type transmitter, typ.
- 1.67 mA
- Input ranges / Voltage
- Yes
- Input ranges / Current
- Yes
- Input ranges / Thermocouple
- Yes
- Input ranges / Resistance thermometer
- Yes
- Input ranges / Resistance
- Yes
- Input ranges (rated values), voltages / 1 V to 5 V
- Yes
- Input ranges (rated values), voltages / 1 V to 5 V / Input resistance (1 V to 5 V)
- 1 MΩ
- Input ranges (rated values), voltages / -1 V to +1 V
- Yes
- Input ranges (rated values), voltages / -1 V to +1 V / Input resistance (-1 V to +1 V)
- 1 MΩ
- Input ranges (rated values), voltages / -10 V to +10 V
- Yes
- Input ranges (rated values), voltages / -10 V to +10 V / Input resistance (-10 V to +10 V)
- 1 MΩ
- Input ranges (rated values), voltages / -2.5 V to +2.5 V
- Yes
- Input ranges (rated values), voltages / -2.5 V to +2.5 V / Input resistance (-2.5 V to +2.5 V)
- 1 MΩ
- Input ranges (rated values), voltages / -250 mV to +250 mV
- Yes
Show all 121 specificationsShow fewer
- Input ranges (rated values), voltages / -250 mV to +250 mV / Input resistance (-250 mV to +250 mV)
- 1 MΩ
- Input ranges (rated values), voltages / -5 V to +5 V
- Yes
- Input ranges (rated values), voltages / -5 V to +5 V / Input resistance (-5 V to +5 V)
- 1 MΩ
- Input ranges (rated values), voltages / -500 mV to +500 mV
- Yes
- Input ranges (rated values), voltages / -500 mV to +500 mV / Input resistance (-500 mV to +500 mV)
- 1 MΩ
- Input ranges (rated values), voltages / -80 mV to +80 mV
- Yes
- Input ranges (rated values), voltages / -80 mV to +80 mV / Input resistance (-80 mV to +80 mV)
- 1 MΩ
- Input ranges (rated values), currents / 0 to 20 mA
- Yes
- Input ranges (rated values), currents / 0 to 20 mA / Input resistance (0 to 20 mA)
- 50 Ω
- Input ranges (rated values), currents / 4 mA to 20 mA
- Yes
- Input ranges (rated values), currents / 4 mA to 20 mA / Input resistance (4 mA to 20 mA)
- 50 Ω
- Input ranges (rated values), thermocouples / Type B
- Yes
- Input ranges (rated values), thermocouples / Type B / Input resistance (Type B)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type E
- Yes
- Input ranges (rated values), thermocouples / Type E / Input resistance (Type E)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type J
- Yes
- Input ranges (rated values), thermocouples / Type J / Input resistance (type J)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type K
- Yes
- Input ranges (rated values), thermocouples / Type K / Input resistance (Type K)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type L
- Yes
- Input ranges (rated values), thermocouples / Type L / Input resistance (Type L)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type N
- Yes
- Input ranges (rated values), thermocouples / Type N / Input resistance (Type N)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type R
- Yes
- Input ranges (rated values), thermocouples / Type R / Input resistance (Type R)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type S
- Yes
- Input ranges (rated values), thermocouples / Type S / Input resistance (Type S)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type T
- Yes
- Input ranges (rated values), thermocouples / Type T / Input resistance (Type T)
- 1 MΩ
- Input ranges (rated values), thermocouples / Type U
- Yes
- Input ranges (rated values), thermocouples / Type U / Input resistance (Type U)
- 1 MΩ
- Input ranges (rated values), resistance thermometer / Ni 100
- Yes
- Input ranges (rated values), resistance thermometer / Ni 100 / Input resistance (Ni 100)
- 1 MΩ
- Input ranges (rated values), resistance thermometer / Ni 1000
- Yes
- Input ranges (rated values), resistance thermometer / Ni 1000 / Input resistance (Ni 1000)
- 1 MΩ
- Input ranges (rated values), resistance thermometer / Pt 100
- Yes
- Input ranges (rated values), resistance thermometer / Pt 100 / Input resistance (Pt 100)
- 1 MΩ
- Input ranges (rated values), resistance thermometer / Pt 1000
- Yes
- Input ranges (rated values), resistance thermometer / Pt 10000
- Yes
- Input ranges (rated values), resistance thermometer / Pt 200
- Yes
- Input ranges (rated values), resistance thermometer / Pt 200 / Input resistance (Pt 200)
- 1 MΩ
- Input ranges (rated values), resistance thermometer / Pt 500
- Yes
- Input ranges (rated values), resistance thermometer / Pt 500 / Input resistance (Pt 500)
- 1 MΩ
- Input ranges (rated values), resistors / 0 to 48 ohms
- Yes
- Input ranges (rated values), resistors / 0 to 48 ohms / Input resistance (0 to 48 ohms)
- 1 MΩ
- Input ranges (rated values), resistors / 0 to 150 ohms
- Yes
- Input ranges (rated values), resistors / 0 to 150 ohms / Input resistance (0 to 150 ohms)
- 1 MΩ
- Input ranges (rated values), resistors / 0 to 300 ohms
- Yes
- Input ranges (rated values), resistors / 0 to 300 ohms / Input resistance (0 to 300 ohms)
- 1 MΩ
- Input ranges (rated values), resistors / 0 to 600 ohms
- Yes
- Input ranges (rated values), resistors / 0 to 600 ohms / Input resistance (0 to 600 ohms)
- 1 MΩ
- Input ranges (rated values), resistors / 0 to 6000 ohms
- Yes; Usable up to 5000 Ohm
- Input ranges (rated values), resistors / 0 to 6000 ohms / Input resistance (0 to 6000 ohms)
- 1 MΩ
- Thermocouple (TC) / Temperature compensation / Parameterizable
- Yes
- Thermocouple (TC) / Temperature compensation / internal temperature compensation
- No
- Thermocouple (TC) / Temperature compensation / external temperature compensation with Pt100
- Yes
- Thermocouple (TC) / Temperature compensation / external temperature compensation with
- Yes
- Thermocouple (TC) / Temperature compensation / external temperature compensation with / dynamic reference temperature value
- Yes
- Thermocouple (TC) / Characteristic linearization / Parameterizable
- Yes
- Thermocouple (TC) / Characteristic linearization / Parameterizable / for thermocouples
- Type B, E, J, K, L, N, R, S, T, U
- Thermocouple (TC) / Characteristic linearization / Parameterizable / for resistance thermometer
- Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000
- Thermocouple (TC) / Cable length / shielded, max.
- 200 m; 50 m with thermocouples and input ranges ≤ 80 mV
- Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.
- 14 bit; with activated filtering: 16 bit
- Integration and conversion time/resolution per channel / Integration time, parameterizable
- Yes
- Integration and conversion time/resolution per channel / Basic conversion time (ms)
- 20.1 / 23.5 ms
- Integration and conversion time/resolution per channel / Integration time (ms)
- 16,7 / 20 ms
- Integration and conversion time/resolution per channel / Interference voltage suppression for interference frequency f1 in Hz
- 50 / 60 Hz
- Integration and conversion time/resolution per channel / Basic execution time of the module (all channels released)
- 161 ms; 161 / 188 ms
- Connection of signal encoders / for voltage measurement
- Yes; possible
- Connection of signal encoders / for current measurement as 2-wire transducer
- Yes
- Connection of signal encoders / for current measurement as 4-wire transducer
- Yes
- Connection of signal encoders / for resistance measurement with two-wire connection
- Yes; Line resistances are also measured
- Connection of signal encoders / for resistance measurement with three-wire connection
- Yes
- Connection of signal encoders / for resistance measurement with four-wire connection
- Yes
- Errors/accuracies / Temperature error (relative to input range), (+/-)
- 0.004 %/K
- Operational error limit in overall temperature range / Voltage, relative to input range, (+/-)
- 0.38 %; ±0.38 % at ±80 mV; ±0.35 % at ±250 mV, ±500 mV, ±1 V, ±2,5 V, ±5 V, 1 to 5 V, ±10 V
- Operational error limit in overall temperature range / Current, relative to input range, (+/-)
- 0.35 %; ±20 mA, 0 to 20 mA, 4 to 20 mA
- Operational error limit in overall temperature range / Resistance, relative to input range, (+/-)
- 0.5 %
- Operational error limit in overall temperature range / Resistance thermometer, relative to input range, (+/-)
- 0.5 %
- Operational error limit in overall temperature range / Thermocouple, relative to input range, (+/-)
- TC Type B (±14.8 K), TC Type R (±9.4 K), TC Type S (±10.6 K), TC Type T (±2.2 K), TC Type E (±4.0 K), TC Type J (±5.2 K), TC Type K (±7.6 K), TC Type U (±3.5 K), TC Type L (±5.1 K), TC Type N (±5.5 K)
- Basic error limit (operational limit at 25 °C) / Voltage, relative to input range, (+/-)
- 0.15 %; ±0.15 % (±250 mV, ±500 mV, ±1 V, ±2.5 V, ±5 V, 1 to 5 V, ±10 V); ±0.17% (±80 mV)
- Basic error limit (operational limit at 25 °C) / Current, relative to input range, (+/-)
- 0.15 %; ±20 mA, 0 to 20 mA, 4 to 20 mA
- Basic error limit (operational limit at 25 °C) / Resistance, relative to input range, (+/-)
- 0.15 %; ±0.15 % at 0 to 48 ohms (4-conductor measurement), 0 to 150 ohms (4-conductor measurement), 0 to 300 ohms (4-conductor measurement), 0 to 600 ohms (4-conductor measurement), 0 to 5000 ohms (4-conductor measurement, in range of 6000 ohms); ±0.3 % at 0 to 300 ohms (3-conductor measurement), 0 to 600 ohms (3-conductor measurement), 0 to 5000 ohms (3- conductor measurement, in range of 6000 ohms)
- Basic error limit (operational limit at 25 °C) / Resistance thermometer, relative to input range, (+/-)
- 0.3 %
- Basic error limit (operational limit at 25 °C) / Thermocouple, relative to input range, (+/-)
- TC Type B (±8.2 K), TC Type R (±5.2 K), TC Type S (±5.9 K), TC Type T (±1.2 K), TC Type E (±1.8 K), TC Type J (±2.3 K), TC Type K (±3.4 K), TC Type U (±1.8 K), TC Type L (±2.3 K), TC Type N (±2.9 K)
- Interrupts/diagnostics/status information / Diagnostics function
- No
- Potential separation analog inputs / Potential separation analog inputs
- Yes; internal/external
- Potential separation analog inputs / between the channels
- No
- Potential separation analog inputs / between the channels and backplane bus
- Yes
- Potential separation analog inputs / Between the channels and load voltage L+
- Yes
- Isolation tested with
- 2 120 V DC between bus and L+/M; 2 120 V DC between bus and analog section; 500 V DC between bus and local ground; 500 V DC between analog section and L+/M; 2 120 V DC between analog section and local ground; 2 120
Technical documents (1)
Key features
- 8 inputs for voltage and current, 4 for resistance or resistance thermometers
- Thermocouple types B, E, J, K, L, N, R, S, T and U
- Pt100, Pt200, Pt500, Pt1000, Pt10000, Ni100 and Ni1000
- 14-bit resolution; external cold-junction compensation with a Pt100
- Discontinued by Siemens on 1 October 2026
About the Siemens 6ES7431-1KF10-0AB0
The Siemens 6ES7431-1KF10-0AB0 is the multi-range 8-channel SM 431: 14-bit resolution and, unlike the 13-bit 6ES7431-1KF00-0AB0, thermocouple and resistance-thermometer ranges. Siemens's data sheet gives voltage ranges from ±80 mV to ±10 V, 0/4 to 20 mA, thermocouple types B, E, J, K, L, N, R, S, T and U, Pt and Ni resistance thermometers, and external cold-junction compensation with a Pt100. SiePortal shows its phase-out announced on 1 October 2025 and its product cancellation on 1 October 2026.
What is the 6ES7431-1KF10-0AB0 used for?
It reads temperatures and transmitter signals into an S7-400 CPU on one module.
Lifecycle and successor
Discontinued.
Before you order
What to photograph or confirm so the right unit is quoted.
Check the order number on the module: 1KF10 has the temperature ranges, 1KF00 does not.
Other parts in the Siemens SIMATIC S7-400 family
Listed for reference. They differ from the 6ES7431-1KF10-0AB0 in rating, supply, interface or function and are not interchangeable with it unless Siemens says so. Match the part number on your unit.
| Product | Type | Lifecycle | Qty Available | Price | Action |
|---|---|---|---|---|---|
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| Siemens 6ES7431-1KF20-0AB0SM 431 analog input, 8 AI, 14 bit, 0.42 ms for all channels | Analog input module | Discontinued | On Request | On request | View |
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| Siemens 6ES7431-7KF00-0AB0SM 431 analog input, 8 AI, 16 bit, U/I/thermocouple | Analog input module | Discontinued | On Request | On request | View |
| Siemens 6ES7431-7KF10-0AB0SM 431 analog input, 8 AI, 16 bit, resistance thermometers | Analog input module | Discontinued | On Request | On request | View |
| Siemens 6ES7431-0HH00-0AB0SM 431 analog input, 16 AI, 13 bit, non-isolated | Analog input module | Discontinued | On Request | On request | View |
| Siemens 6ES7432-1HF00-0AB0SM 432 analog output, 8 AO, 13 bit, U/I | Analog output module | Discontinued | On Request | On request | View |
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