6ES7531-7KF00-0AB0

Siemens AI 8xU/I/RTD/TC ST analog input module, 16 bit

Generic illustration of a Siemens SIMATIC S7-1500 station, not a photograph of 6ES7531-7KF00-0AB0; the exact product may look different.

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Siemens SIMATIC S7-1500 analog input module AI 8xU/I/RTD/TC ST: 8 channels, 16-bit, accuracy 0.3 %, 4 channels for RTD, diagnostics and hardware interrupts.

Manufacturer: Siemens
Manufacturer part no.: 6ES7531-7KF00-0AB0
Product family: SIMATIC S7-1500 PLC
Type: Analog input module
Lifecycle: Active product (Siemens SiePortal)
OEM successor: Not stated
Technical datasheet: Data sheet

Technical specifications

Manufacturer: Siemens
Manufacturer part no.: 6ES7531-7KF00-0AB0
Type: Analog input module
Application: Analog input module
Used with: S7-1500 and ET 200MP stations
Product type designation: AI 8xU/I/RTD/TC ST
HW functional status: FS04
Firmware version: V2.0.0
Firmware version / FW update possible: Yes
Product function / I&M data: Yes; I&M0 to I&M3
Product function / Isochronous mode: No
Product function / Prioritized startup: No
Product function / Measuring range scalable: No
Product function / Scalable measured values: No
Product function / Adjustment of measuring range: No
Engineering with / STEP 7 TIA Portal configurable/integrated from version: V12 / V12
Engineering with / STEP 7 configurable/integrated from version: V5.5 SP3 / -
Engineering with / PROFIBUS from GSD version/GSD revision: V1.0 / V5.1
Engineering with / PROFINET from GSD version/GSD revision: V2.3 / -
Operating mode / Oversampling: No
Operating mode / MSI: Yes
CiR - Configuration in RUN / Reparameterization possible in RUN: Yes
CiR - Configuration in RUN / Calibration possible in RUN: Yes
Supply voltage / Rated value (DC): 24 V
Supply voltage / permissible range, lower limit (DC): 19.2 V
Supply voltage / permissible range, upper limit (DC): 28.8 V
Supply voltage / Reverse polarity protection: Yes
Input current / Current consumption, max.: 255 mA; with 19.2 V supply
24 V encoder supply / Short-circuit protection: Yes
24 V encoder supply / Output current, max.: 20 mA; Max. 47 mA per channel for a duration < 10 s

Show all 231 specifications

Power consumption from the backplane bus: 0.7 W
Power loss, typ.: 2.7 W
Address space per module / Inputs: 16 byte; typical, maximum 68 bytes, see manual for details
Address space per module / Outputs: 0 byte
Number of analog inputs: 8
Number of analog inputs / For current measurement: 8
Number of analog inputs / For voltage measurement: 8
Number of analog inputs / For resistance/resistance thermometer measurement: 4
Number of analog inputs / For thermocouple measurement: 8
Analog inputs / permissible input voltage for voltage input (destruction limit), max.: 28.8 V
Analog inputs / permissible input current for current input (destruction limit), max.: 40 mA
Analog inputs / Constant measurement current for resistance-type transmitter,: 150 Ohm, 300 Ohm, 600 Ohm, Pt100, Pt200, Ni100: 1.25 mA; 6 000 Ohm,
Analog inputs / typ.: Pt500, Pt1000, Ni1000, LG-Ni1000: 0.625 mA; PTC: 0.472 mA
Analog inputs / Technical unit for temperature measurement adjustable: Yes; °C/°F/K
Analog input with oversampling: No
Analog inputs / Standardization of measured values: No
Input ranges (rated values), voltages / 0 to +5 V: No
Input ranges (rated values), voltages / 0 to +10 V: No
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): 100 kΩ
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): 10 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): 100 kΩ
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): 10 MΩ
Input ranges (rated values), voltages / -25 mV to +25 mV: No
Input ranges (rated values), voltages / -250 mV to +250 mV: Yes
Input ranges (rated values), voltages / -250 mV to +250 mV / Input resistance (-250 mV to +250 mV): 10 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): 100 kΩ
Input ranges (rated values), voltages / -50 mV to +50 mV: Yes
Input ranges (rated values), voltages / -50 mV to +50 mV / Input resistance (-50 mV to +50 mV): 10 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): 10 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): 10 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): 25 Ω; Plus approx. 42 ohms for overvoltage protection by PTC
Input ranges (rated values), currents / -20 mA to +20 mA: Yes
Input ranges (rated values), currents / -20 mA to +20 mA / Input resistance (-20 mA to +20 mA): 25 Ω; Plus approx. 42 ohms for overvoltage protection by PTC
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): 25 Ω; Plus approx. 42 ohms for overvoltage protection by PTC
Input ranges (rated values), thermocouples / Type B: Yes
Input ranges (rated values), thermocouples / Type B / Input resistance (Type B): 10 MΩ
Input ranges (rated values), thermocouples / Type C: No
Input ranges (rated values), thermocouples / Type E: Yes
Input ranges (rated values), thermocouples / Type E / Input resistance (Type E): 10 MΩ
Input ranges (rated values), thermocouples / Type J: Yes
Input ranges (rated values), thermocouples / Type J / Input resistance (type J): 10 MΩ
Input ranges (rated values), thermocouples / Type K: Yes
Input ranges (rated values), thermocouples / Type K / Input resistance (Type K): 10 MΩ
Input ranges (rated values), thermocouples / Type L: No
Input ranges (rated values), thermocouples / Type N: Yes
Input ranges (rated values), thermocouples / Type N / Input resistance (Type N): 10 MΩ
Input ranges (rated values), thermocouples / Type R: Yes
Input ranges (rated values), thermocouples / Type R / Input resistance (Type R): 10 MΩ
Input ranges (rated values), thermocouples / Type S: Yes
Input ranges (rated values), thermocouples / Type S / Input resistance (Type S): 10 MΩ
Input ranges (rated values), thermocouples / Type T: Yes
Input ranges (rated values), thermocouples / Type T / Input resistance (Type T): 10 MΩ
Input ranges (rated values), thermocouples / Type TXK/TXK(L) to GOST: No
Input ranges (rated values), resistance thermometer / Cu 10: No
Input ranges (rated values), resistance thermometer / Cu 10 according to GOST: No
Input ranges (rated values), resistance thermometer / Cu 50: No
Input ranges (rated values), resistance thermometer / Cu 50 according to GOST: No
Input ranges (rated values), resistance thermometer / Cu 100: No
Input ranges (rated values), resistance thermometer / Cu 100 according to GOST: No
Input ranges (rated values), resistance thermometer / Ni 10: No
Input ranges (rated values), resistance thermometer / Ni 10 according to GOST: No
Input ranges (rated values), resistance thermometer / Ni 100: Yes; Standard/climate
Input ranges (rated values), resistance thermometer / Ni 100 / Input resistance (Ni 100): 10 MΩ
Input ranges (rated values), resistance thermometer / Ni 100 according to GOST: No
Input ranges (rated values), resistance thermometer / Ni 1000: Yes; Standard/climate
Input ranges (rated values), resistance thermometer / Ni 1000 / Input resistance (Ni 1000): 10 MΩ
Input ranges (rated values), resistance thermometer / Ni 1000 according to GOST: No
Input ranges (rated values), resistance thermometer / LG-Ni 1000: Yes; Standard/climate
Input ranges (rated values), resistance thermometer / LG-Ni 1000 / Input resistance (LG-Ni 1000): 10 MΩ
Input ranges (rated values), resistance thermometer / Ni 120: No
Input ranges (rated values), resistance thermometer / Ni 120 according to GOST: No
Input ranges (rated values), resistance thermometer / Ni 200 according to GOST: No
Input ranges (rated values), resistance thermometer / Ni 500: No
Input ranges (rated values), resistance thermometer / Ni 500 according to GOST: No
Input ranges (rated values), resistance thermometer / Pt 10: No
Input ranges (rated values), resistance thermometer / Pt 10 according to GOST: No
Input ranges (rated values), resistance thermometer / Pt 50: No
Input ranges (rated values), resistance thermometer / Pt 50 according to GOST: No
Input ranges (rated values), resistance thermometer / Pt 100: Yes; Standard/climate
Input ranges (rated values), resistance thermometer / Pt 100 / Input resistance (Pt 100): 10 MΩ
Input ranges (rated values), resistance thermometer / Pt 100 according to GOST: No
Input ranges (rated values), resistance thermometer / Pt 1000: Yes; Standard/climate
Input ranges (rated values), resistance thermometer / Pt 1000 / Input resistance (Pt 1000): 10 MΩ
Input ranges (rated values), resistance thermometer / Pt 1000 according to GOST: No
Input ranges (rated values), resistance thermometer / Pt 200: Yes; Standard/climate
Input ranges (rated values), resistance thermometer / Pt 200 / Input resistance (Pt 200): 10 MΩ
Input ranges (rated values), resistance thermometer / Pt 200 according to GOST: No
Input ranges (rated values), resistance thermometer / Pt 500: Yes; Standard/climate
Input ranges (rated values), resistance thermometer / Pt 500 / Input resistance (Pt 500): 10 MΩ
Input ranges (rated values), resistance thermometer / Pt 500 according to GOST: No
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): 10 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): 10 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): 10 MΩ
Input ranges (rated values), resistors / 0 to 3000 ohms: No
Input ranges (rated values), resistors / 0 to 6000 ohms: Yes
Input ranges (rated values), resistors / 0 to 6000 ohms / Input resistance (0 to 6000 ohms): 10 MΩ
Input ranges (rated values), resistors / PTC: Yes
Input ranges (rated values), resistors / PTC / Input resistance (PTC): 10 MΩ
Thermocouple (TC) / Temperature compensation / Parameterizable: Yes
Thermocouple (TC) / Temperature compensation / internal temperature compensation: Yes
Thermocouple (TC) / Temperature compensation / external temperature compensation via RTD: Yes
Thermocouple (TC) / Temperature compensation / Compensation for 0 °C reference point temperature: Yes; fixed value can be set
Thermocouple (TC) / Temperature compensation / Reference channel of the module: Yes
Thermocouple (TC) / Cable length / shielded, max.: 800 m; for U/I, 200 m for R/RTD, 50 m for TC
Analog value generation for the inputs / Measurement principle: integrating
Integration and conversion time/resolution per channel / Resolution with overrange (bit including sign), max.: 16 bit
Integration and conversion time/resolution per channel / Integration time, parameterizable: Yes
Integration and conversion time/resolution per channel / Integration time (ms): 2,5 / 16,67 / 20 / 100 ms
Integration and conversion time/resolution per channel / Basic conversion time, including integration time (ms): 9 / 23 / 27 / 107 ms
Integration and conversion time/resolution per channel / Basic conversion time, including integration time (ms) / additional conversion time for wire-break monitoring: 9 ms (to be considered in R/RTD/TC measurement)
Integration and conversion time/resolution per channel / Basic conversion time, including integration time (ms) / additional conversion time for resistance: 150 ohm, 300 ohm, 600 ohm, Pt100, Pt200, Ni100: 2 ms, 6000 ohm, Pt500,
Integration and conversion time/resolution per channel / Basic conversion time, including integration time (ms) / measurement: Pt1000, Ni1000, LG-Ni1000, PTC: 4 ms
Integration and conversion time/resolution per channel / Interference voltage suppression for interference frequency f1 in Hz: 400 / 60 / 50 / 10 Hz
Integration and conversion time/resolution per channel / Time for offset calibration (per module): Basic conversion time of the slowest channel
Smoothing of measured values / Number of smoothing levels: 4
Smoothing of measured values / parameterizable: Yes
Smoothing of measured values / Step: None: Yes
Smoothing of measured values / Step: low: Yes
Smoothing of measured values / Step: Medium: Yes
Smoothing of measured values / Step: High: Yes
Connection of signal encoders / for voltage measurement: Yes
Connection of signal encoders / for current measurement as 2-wire transducer: Yes
Connection of signal encoders / for current measurement as 2-wire transducer / Burden of 2-wire transmitter, max.: 820 Ω
Connection of signal encoders / for current measurement as 4-wire transducer: Yes
Connection of signal encoders / for resistance measurement with two-wire connection: Yes; Only for PTC
Connection of signal encoders / for resistance measurement with three-wire connection: Yes; All measuring ranges except PTC; internal compensation of the cable resistances
Connection of signal encoders / for resistance measurement with four-wire connection: Yes; All measuring ranges except PTC
Errors/accuracies / Linearity error (relative to input range), (+/-): 0.02 %
Errors/accuracies / Temperature error (relative to input range), (+/-): 0.005 %/K; With TC type T 0.02 ± % / K
Errors/accuracies / Crosstalk between the inputs, max.: -80 dB
Errors/accuracies / Repeat accuracy in steady state at 25 °C (relative to input range), (+/-): 0.02 %
Errors/accuracies / Temperature error of internal compensation: ±6 °C
Operational error limit in overall temperature range / Voltage, relative to input range, (+/-): 0.3 %
Operational error limit in overall temperature range / Current, relative to input range, (+/-): 0.3 %
Operational error limit in overall temperature range / Resistance, relative to input range, (+/-): 0.3 %
Operational error limit in overall temperature range / Resistance thermometer, relative to input range, (+/-): Ptxxx standard: ±1.5 K, Ptxxx climate: ±0.5 K, Nixxx standard: ±0.5 K, Nixxx climate: ±0.3 K
Operational error limit in overall temperature range / Thermocouple, relative to input range, (+/-): Type B: > 600 °C ±4.6 K, type E: > -200 °C ±1.5 K, type J: > -210 °C ±1.9 K, type K: > -200 °C ±2.4 K, type N: > -200 °C ±2.9 K, type R: > 0 °C ±4.7 K, type S: > 0 °C ±4.6 K, type T: > -200 °C ±2.4 K
Basic error limit (operational limit at 25 °C) / Voltage, relative to input range, (+/-): 0.1 %
Basic error limit (operational limit at 25 °C) / Current, relative to input range, (+/-): 0.1 %
Basic error limit (operational limit at 25 °C) / Resistance, relative to input range, (+/-): 0.1 %
Basic error limit (operational limit at 25 °C) / Resistance thermometer, relative to input range, (+/-): Ptxxx standard: ±0.7 K, Ptxxx climate: ±0.2 K, Nixxx standard: ±0.3 K, Nixxx climate: ±0.15 K
Basic error limit (operational limit at 25 °C) / Thermocouple, relative to input range, (+/-): Type B: > 600 °C ±1.7 K, type E: > -200 °C ±0.7 K, type J: > -210 °C ±0.8 K, type K: > -200 °C ±1.2 K, type N: > -200 °C ±1.2 K, type R: > 0 °C ±1.9 K, type S: > 0 °C ±1.9 K, type T: > -200 °C ±0.8 K
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency / Series mode interference (peak value of interference < rated value of input range), min.: 40 dB
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency / Common mode voltage, max.: 10 V
Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency / Common mode interference, min.: 60 dB
Interrupts/diagnostics/status information / Diagnostics function: Yes
Alarms / Diagnostic alarm: Yes
Alarms / Limit value alarm: Yes; two upper and two lower limit values in each case
Diagnoses / Monitoring the supply voltage: Yes
Diagnoses / Wire break: Yes; Only for 1 to 5 V, 4 to 20 mA, TC, R, and RTD
Diagnoses / Short-circuit: No
Diagnoses / Group error: No
Diagnoses / Overflow/Underflow: Yes
Diagnostics indication LED / RUN LED: Yes; green LED
Diagnostics indication LED / ERROR LED: Yes; red LED
Diagnostics indication LED / MAINT LED: No
Diagnostics indication LED / Monitoring of the supply voltage (PWR-LED): Yes; green LED
Diagnostics indication LED / Channel status display: Yes; green LED
Diagnostics indication LED / for channel diagnostics: Yes; red LED
Diagnostics indication LED / for module diagnostics: Yes; red LED
Potential separation channels / between the channels: No
Potential separation channels / between the channels, in groups of: 8
Potential separation channels / between the channels and backplane bus: Yes
Potential separation channels / between the channels and the power supply of the electronics: Yes
Permissible potential difference / between the inputs (UCM): 20 V DC
Permissible potential difference / Between the inputs and MANA (UCM): 10 V DC
Isolation tested with: 707 V DC (type test)
Standards, approvals, certificates / Siemens Eco Profile (SEP): Siemens EcoTech
Standards, approvals, certificates / Suitable for applications according to AMS 2750: Yes; Declaration of Conformity, see online support entry 109757262
Standards, approvals, certificates / Suitable for applications according to CQI-9: Yes; Based on AMS 2750 E
Ecological footprint / environmental product declaration: Yes
Ecological footprint / Global warming potential / global warming potential, (total) [CO2 eq]: 38.6 kg
Ecological footprint / Global warming potential / global warming potential, (during production) [CO2 eq]: 14.4 kg
Ecological footprint / Global warming potential / global warming potential, (during operation) [CO2 eq]: 24.6 kg
Ecological footprint / Global warming potential / global warming potential, (after end of life cycle) [CO2 eq]: -0.44 kg
Security / signed firmware update: No
Security / securely removing data: No
Security / data integrity: No
Ambient temperature during operation / horizontal installation, min.: -25 °C; From FS08
Ambient temperature during operation / horizontal installation, max.: 60 °C
Ambient temperature during operation / vertical installation, min.: -25 °C; From FS08
Ambient temperature during operation / vertical installation, max.: 40 °C
Altitude during operation relating to sea level / Installation altitude above sea level, max.: 5 000 m; Restrictions for installation altitudes > 2 000 m, see manual
Absolute humidity / dew point, min.: -60 °C; suitable for dry room applications
Width: 35 mm
Height: 147 mm
Depth: 129 mm
Weight, approx.: 310 g
Other / Note:: please order front connectors (screw-in/push-in) separately

Technical documents (1)

Siemens data sheet 6ES7531-7KF00-0AB0

Key features

8 analog inputs: voltage, current and thermocouple on all 8, RTD on 4
16-bit resolution, accuracy 0.3 %
Integration time 2.5, 16.67, 20 or 100 ms
Diagnostics and hardware interrupts
Takes a 40-pole front connector (35 mm module)

About the Siemens 6ES7531-7KF00-0AB0

The Siemens 6ES7531-7KF00-0AB0 is the S7-1500 AI 8xU/I/RTD/TC ST analog input module. Siemens describes it with 16-bit resolution and 0.3 % accuracy; its data sheet gives voltage, current and thermocouple measurement on all eight channels and resistance thermometers on four, integration times of 2.5, 16.67, 20 or 100 ms, diagnostics and hardware interrupts. It ships with its infeed element and shield bracket. SiePortal lists it as an active product.

What is the 6ES7531-7KF00-0AB0 used for?

It brings process values into an S7-1500 or ET 200MP station: transmitter signals, thermocouples and RTDs.

Lifecycle and successor

Active product (Siemens SiePortal).

Before you order

What to photograph or confirm so the right unit is quoted.

Check the order number on the module and note the range on each channel. The front connector with the field wiring normally moves across to the replacement.

Alternatives for 6ES7531-7KF00-0AB0

The manufacturer’s named successor and other parts in the same family. None is a drop-in replacement without checking wiring, I/O and configuration for your installation.

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