Siemens
01 2018
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Article number

6ES7431-0HH00-0AB0

6ES7431-1KF20-0AB0

6ES7431-1KF00-0AB0

6ES7431-1KF10-0AB0

SIMATIC S7-400, ANALOG INPUT

SIMATIC S7-400, SM 431

SIMATIC S7-400, SM 431

SIMATIC S7-400, SM 431

Supply voltage

Load voltage L+

  • ● Rated value (DC)

24V; Only required for supplying 2-wire transmitters

24V; Only required for supplying 2-wire transmitters

not necessary

24V; Only required for supplying 2-wire transmitters

  • ● Reverse polarity protection

Yes

Yes

Yes

Input current

from load voltage L+ (without load), max.

400mA; for 16 connected, fully controlled 2-wire transmitters

200mA; for 8 connected, fully controlled 2-wire transmitters

200mA; for 8 connected, fully controlled 2-wire transmitters

from backplane bus 5 V DC, max.

100mA

1000mA

350mA

600mA

Power loss

Power loss, typ.

2W

4.9W

1.8W

3.5W

Analog inputs

Number of analog inputs

16

8

8

8

  • ● For voltage/current measurement

16

8

8

8

  • ● For resistance measurement

4

4

4

permissible input voltage for voltage input (destruction limit), max.

20V; 20 V DC permanent, 75 V DC for max. 1 s (duty factor 1:20)

18V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20)

50V

18V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20)

permissible input current for current input (destruction limit), max.

40mA

40mA; Permanent

50mA; 40 mA continuous

40mA; Permanent

Input ranges

  • ● Voltage

Yes

Yes

Yes

Yes

  • ● Current

Yes

Yes

Yes

Yes

  • ● Thermocouple

No

No

No

Yes

  • ● Resistance thermometer

No

No

No

Yes

  • ● Resistance

No

Yes

Yes

Yes

Input ranges (rated values), voltages

  • ● 1 V to 5 V

Yes

Yes

Yes

Yes

  • ● Input resistance (1 V to 5 V)

100kΩ

10MΩ

200kΩ

1MΩ

  • ● -1 V to +1 V

Yes

Yes

Yes

Yes

  • ● Input resistance (-1 V to +1 V)

10MΩ

10MΩ

200kΩ

1MΩ

  • ● -10 V to +10 V

Yes

Yes

Yes

Yes

  • ● Input resistance (-10 V to +10 V)

100kΩ

100kΩ

200kΩ

1MΩ

  • ● -2.5 V to +2.5 V

Yes

  • ● Input resistance (-2.5 V to +2.5 V)

1MΩ

  • ● -250 mV to +250 mV

Yes

  • ● Input resistance (-250 mV to +250 mV)

1MΩ

  • ● -5 V to +5 V

Yes

  • ● Input resistance (-5 V to +5 V)

1MΩ

  • ● -500 mV to +500 mV

Yes

  • ● Input resistance (-500 mV to +500 mV)

1MΩ

  • ● -80 mV to +80 mV

Yes

  • ● Input resistance (-80 mV to +80 mV)

1MΩ

Input ranges (rated values), currents

  • ● 0 to 20 mA

Yes

  • ● Input resistance (0 to 20 mA)

50Ω

  • ● -20 mA to +20 mA

Yes

Yes

Yes

  • ● Input resistance (-20 mA to +20 mA)

50Ω

50Ω

80Ω

  • ● 4 mA to 20 mA

Yes

Yes

Yes

Yes

  • ● Input resistance (4 mA to 20 mA)

50Ω

50kΩ

80Ω

50Ω

Input ranges (rated values), thermocouples

  • ● Type B

Yes

  • ● Type E

Yes

  • ● Type J

Yes

  • ● Type K

Yes

  • ● Type L

Yes

  • ● Type N

Yes

  • ● Type R

Yes

  • ● Type S

Yes

  • ● Type T

Yes

  • ● Type U

Yes

Input ranges (rated values), resistance thermometer

  • ● Ni 100

Yes

  • ● Input resistance (Ni 100)

1MΩ

  • ● Ni 1000

Yes

  • ● Input resistance (Ni 1000)

1MΩ

  • ● Pt 100

Yes

  • ● Input resistance (Pt 100)

1MΩ

  • ● Pt 1000

Yes

  • ● Pt 10000

Yes

  • ● Pt 200

Yes

  • ● Input resistance (Pt 200)

1MΩ

  • ● Pt 500

Yes

  • ● Input resistance (Pt 500)

1MΩ

Input ranges (rated values), resistors

  • ● 0 to 48 ohms

Yes

  • ● Input resistance (0 to 48 ohms)

1MΩ

  • ● 0 to 150 ohms

Yes

  • ● Input resistance (0 to 150 ohms)

1MΩ

  • ● 0 to 300 ohms

Yes

  • ● Input resistance (0 to 300 ohms)

1MΩ

  • ● 0 to 600 ohms

Yes

Yes

Yes

  • ● Input resistance (0 to 600 ohms)

usable up to 500 ohms

1MΩ

  • ● 0 to 6000 ohms

Yes; Usable up to 5000 Ohm

  • ● Input resistance (0 to 6000 ohms)

1MΩ

Thermocouple (TC)

Temperature compensation

  • — internal temperature compensation

No

  • — external temperature compensation with compensations socket

Yes

  • — external temperature compensation with Pt100

Yes

  • — dynamic reference temperature value

Yes

Characteristic linearization

  • ● parameterizable

Yes

  • — for thermocouples

Type B, E, J, K, L, N, R, S, T, U

  • — for resistance thermometer

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000

Cable length

  • ● shielded, max.

200m

200m

200m

200m; 50 m with thermocouples and input ranges <= 80 mV

Analog value generation for the inputs

Integration and conversion time/resolution per channel

  • ● Resolution with overrange (bit including sign), max.

13bit

14bit; 14 / 14 / 14

13bit

14bit; with activated filtering: 16 bits

  • ● Integration time, parameterizable

Yes

Yes

Yes

Yes

  • ● Basic conversion time (ms)

55 / 65 ms

52 s

23 / 25 ms

20.1 / 23.5 ms

  • ● Integration time (ms)

50 / 60 ms

16,7 / 20 ms

16,7 / 20 ms

  • ● Basic conversion time, including integration time (ms)

  • — additional conversion time for wire-break monitoring

4,3 ms

  • — additional conversion time for resistance measurement

40.2 / 47 ms

  • — additional conversion time for wire-break monitoring and resistance measurement

5,5 ms

  • ● Interference voltage suppression for interference frequency f1 in Hz

50 / 60 Hz

none / 400 / 60 / 50 Hz

50 / 60 Hz

50 / 60 Hz

Encoder

Connection of signal encoders

  • ● for voltage measurement

Yes; possible

Yes; possible

Yes; possible

Yes; possible

  • ● for current measurement as 2-wire transducer

Yes

Yes; with external transmitter supply

Yes

  • ● for current measurement as 4-wire transducer

Yes

Yes

Yes

Yes

  • ● for resistance measurement with two-wire connection

Yes; Line resistances are also measured

Yes; Line resistances are also measured

Yes; Line resistances are also measured

  • ● for resistance measurement with three-wire connection

Yes; Line resistances are also measured

Yes; Line resistances are also measured

Yes

  • ● for resistance measurement with four-wire connection

Yes

Yes

Yes

Errors/accuracies

Operational error limit in overall temperature range

  • ● Voltage, relative to input range, (+/-)

0.65%; 1.0 % at 1 to 5 V; 0.65 % at 1 V, 10 V

0.7%; 0.7 % at 1 V; 0.9 % at 10 V, 1 to 5 V

1%; 1.0 % at 1 V; 0.6 % at 10 V; 0.7 % at 1 to 5 V

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

  • ● Current, relative to input range, (+/-)

0.65%

0.8%; at 20 mA, 4 to 20 mA

1%; at 20 mA, 4 to 20 mA

0.35%; 20 mA, 0 to 20 mA, 4 to 20 mA

  • ● Resistance, relative to input range, (+/-)

1%

1.25%; 0 to 500 ohms (4-conductor measurement, in range of 600 ohms)

0.5%

  • ● Resistance thermometer, relative to input range, (+/-)

0.5%

Basic error limit (operational limit at 25 C)

  • ● Voltage, relative to input range, (+/-)

0.25%; 0.5% at 1 to 5 V; 0.25% at 1 V, 10 V

0.6%; 0.6 % at 1 V; 0.75 % at 10 V, 1 to 5 V

0.7%; 0.7% at 1 V; 0.4% at 10 V; 0.5% at 1 to 5 V

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)

  • ● Current, relative to input range, (+/-)

0.25%; at 20 mA, 4 to 20 mA

0.7%; at 20 mA, 4 to 20 mA

0.7%; at 20 mA, 4 to 20 mA

0.15%; 20 mA, 0 to 20 mA, 4 to 20 mA

  • ● Resistance, relative to input range, (+/-)

0.7%; 0 to 600 ohms

0.8%; 0 to 500 ohms (4-conductor measurement, in range of 600 ohms)

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)

  • ● Resistance thermometer, relative to input range, (+/-)

0.3%

Potential separation

Potential separation analog inputs

  • ● Potential separation analog inputs

No

Yes; internal/external

Yes; internal/external

Yes; internal/external

  • ● between the channels

No

No

No

No

Isolation

Isolation tested with

500 V AC/707 V DC, type test

2 120 V DC between bus and analog section; 500 V DC between bus and local ground; 500 V DC between analog part and L+/M; 2 120 V DC between analog part and local ground; 2 120 V DC between L+/M and local ground

2120 V DC between bus and analog part; 500 V DC between bus and local ground; 2120 V DC between analog part and local ground

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 V DC between L+/M and local ground

Dimensions

Width

25mm

25mm

25mm

25mm

Height

290mm

290mm

290mm

290mm

Depth

210mm

210mm

210mm

210mm

Weights

Weight, approx.

500g

500g

500g

500g


Article number

6ES7431-7QH00-0AB0

6ES7431-7KF00-0AB0

6ES7431-7KF10-0AB0

SIMATIC S7-400, SM 431

SM 431, 8AI, U/I/THERMO, 16BIT

SM 431, 8AI, RESIST./PT100, 16BIT,

Supply voltage

Load voltage L+

  • ● Rated value (DC)

24V; Only required for supplying 2-wire transmitters

  • ● Reverse polarity protection

Yes

Input current

from load voltage L+ (without load), max.

400mA; for 16 connected, fully controlled 2-wire transmitters

from backplane bus 5 V DC, max.

700mA

1200mA

650mA

Power loss

Power loss, typ.

4.5W

4.6W

3.3W

Analog inputs

Number of analog inputs

16

8

8

  • ● For voltage/current measurement

16

8

  • ● For resistance measurement

8

8

permissible input voltage for voltage input (destruction limit), max.

18V; 18 V continuous, 75 V for 1 ms (mark to space ratio 1:20)

35V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20)

35V; 35 V continuous, 75 V for max. 1 s (mark to space ratio 1:20)

permissible input current for current input (destruction limit), max.

40mA

32mA

Input ranges

  • ● Voltage

Yes

Yes

No

  • ● Current

Yes

Yes

No

  • ● Thermocouple

Yes

Yes

No

  • ● Resistance thermometer

Yes

No

Yes

  • ● Resistance

Yes

No

Yes

Input ranges (rated values), voltages

  • ● 1 V to 5 V

Yes

Yes

  • ● Input resistance (1 V to 5 V)

1MΩ

> 2 000 ohms

  • ● -1 V to +1 V

Yes

Yes

  • ● Input resistance (-1 V to +1 V)

1MΩ

  • ● -10 V to +10 V

Yes

Yes

  • ● Input resistance (-10 V to +10 V)

1MΩ

  • ● -100 mV to +100 mV

Yes

  • ● -2.5 V to +2.5 V

Yes

Yes

  • ● Input resistance (-2.5 V to +2.5 V)

1MΩ

  • ● -20 mV to +20 mV

Yes

  • ● -25 mV to +25 mV

Yes

  • ● Input resistance (-25 mV to +25 mV)

1MΩ

  • ● -250 mV to +250 mV

Yes

Yes

  • ● Input resistance (-250 mV to +250 mV)

1MΩ

  • ● -5 V to +5 V

Yes

Yes

  • ● Input resistance (-5 V to +5 V)

1MΩ

  • ● -50 mV to +50 mV

Yes

Yes

  • ● Input resistance (-50 mV to +50 mV)

1MΩ

  • ● -500 mV to +500 mV

Yes

Yes

  • ● Input resistance (-500 mV to +500 mV)

1MΩ

  • ● -80 mV to +80 mV

Yes

Yes

  • ● Input resistance (-80 mV to +80 mV)

1MΩ

Input ranges (rated values), currents

  • ● 0 to 20 mA

Yes

Yes

  • ● Input resistance (0 to 20 mA)

50Ω

  • ● -10 mA to +10 mA

Yes

Yes

  • ● Input resistance (-10 mA to +10 mA)

50Ω

  • ● -20 mA to +20 mA

Yes

Yes

  • ● Input resistance (-20 mA to +20 mA)

50Ω

  • ● -3.2 mA to +3.2 mA

Yes

  • ● 4 mA to 20 mA

Yes

Yes

  • ● Input resistance (4 mA to 20 mA)

50Ω

50Ω

  • ● -5 mA to +5 mA

Yes

Yes

  • ● Input resistance (-5 mA to +5 mA)

50Ω

Input ranges (rated values), thermocouples

  • ● Type B

Yes

Yes

  • ● Type E

Yes

Yes

  • ● Type J

Yes

Yes

  • ● Type K

Yes

Yes

  • ● Type L

Yes

Yes

  • ● Type N

Yes

Yes

  • ● Type R

Yes

Yes

  • ● Type S

Yes

Yes

  • ● Type T

Yes

Yes

  • ● Type U

Yes

Yes

Input ranges (rated values), resistance thermometer

  • ● Ni 100

Yes

Yes

  • ● Input resistance (Ni 100)

1MΩ

> 10 000 ohms

  • ● Ni 1000

Yes

Yes; Different characteristics selectable: Europe/U.S.

  • ● Input resistance (Ni 1000)

1MΩ

> 10 000 ohms

  • ● Pt 100

Yes

Yes

  • ● Input resistance (Pt 100)

1MΩ

> 10 000 ohms

  • ● Pt 1000

Yes

Yes

  • ● Input resistance (Pt 1000)

1MΩ

> 10 000 ohms

  • ● Pt 200

Yes

Yes

  • ● Input resistance (Pt 200)

1MΩ

> 10 000 ohms

  • ● Pt 500

Yes

Yes

  • ● Input resistance (Pt 500)

1MΩ

> 10 000 ohms

Input ranges (rated values), resistors

  • ● 0 to 48 ohms

Yes

  • ● Input resistance (0 to 48 ohms)

1MΩ

  • ● 0 to 150 ohms

Yes

  • ● Input resistance (0 to 150 ohms)

1MΩ

  • ● 0 to 300 ohms

Yes

  • ● Input resistance (0 to 300 ohms)

1MΩ

  • ● 0 to 600 ohms

Yes

  • ● Input resistance (0 to 600 ohms)

1MΩ

  • ● 0 to 6000 ohms

Yes; Usable up to 5000 Ohm

  • ● Input resistance (0 to 6000 ohms)

1MΩ

Thermocouple (TC)

Temperature compensation

  • — internal temperature compensation

Yes

  • — external temperature compensation with compensations socket

Yes

Yes

  • — external temperature compensation with Pt100

Yes

  • — dynamic reference temperature value

Yes

Yes

Characteristic linearization

  • ● parameterizable

Yes

Yes

Yes

  • — for thermocouples

Type B, E, J, K, L, N, R, S, T, U

Type B, E, J, K, L, N, R, S, T, U

  • — for resistance thermometer

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni1000; different characteristics selectable (Europe/U.S.)

Cable length

  • ● shielded, max.

200m; 50 m with thermocouples and input ranges <= 80 mV

200m

200m; 50 m with thermocouples and input ranges 80 mV

Analog value generation for the inputs

Integration and conversion time/resolution per channel

  • ● Resolution with overrange (bit including sign), max.

16bit; 16 / 16 / 16

16bit

16bit

  • ● Integration time, parameterizable

Yes

Yes

Yes

  • ● Basic conversion time (ms)

6 / 20,1 / 23,5 ms

10 / 16,7 / 20 / 100

8 / 23 / 25 ms

  • ● Integration time (ms)

2,5 / 16,7 / 20 ms

2,5 / 16,7 / 20 / 100

20 ms at 50 Hz (entire module incl. wire break)

  • ● Basic conversion time, including integration time (ms)

  • — additional conversion time for wire-break monitoring

4.3 / 4.3 / 4.3 ms

110 ms / 4 ms

  • — additional conversion time for resistance measurement

12 / 40,2 / 47 ms

  • — additional conversion time for wire-break monitoring and resistance measurement

5,5 ms

1 ms (module)

none

  • ● Interference voltage suppression for interference frequency f1 in Hz

400 / 60 / 50 Hz

400 / 60 / 50 / 10 Hz

none/ 60 / 50 Hz

Encoder

Connection of signal encoders

  • ● for voltage measurement

Yes; possible

Yes; possible

  • ● for current measurement as 2-wire transducer

Yes

  • ● for current measurement as 4-wire transducer

Yes

Yes

  • ● for resistance measurement with two-wire connection

Yes; Line resistances are also measured

  • ● for resistance measurement with three-wire connection

Yes

Yes

  • ● for resistance measurement with four-wire connection

Yes

Yes

Yes

Errors/accuracies

Operational error limit in overall temperature range

  • ● Voltage, relative to input range, (+/-)

0.3%; 0.3 % at 250 mV, 500 mV, 1 V, 2.5 V, 5 V, 1 to 5 V, 10 V; 0.31 % at 80 mV; 0.32 % at 50 mV; 0.35 % at 25 mV

0.3%

  • ● Current, relative to input range, (+/-)

0.3%; at 0 to 20 mA, 5 mA, 10 mA, 20 mA, 4 to 20 mA

0.5%

  • ● Resistance, relative to input range, (+/-)

0.3%; 0.3% at 0 to 48 Ohm (4-conductor measurement), 0 to 150 Ohm (4-conductor measurement), 0 to 300 Ohm (4-conductor measurement), 0 to 600 Ohm (4-conductor measurement), 0 to 5000 Ohm (4-conductor measurement, in range of 6000 Ohm); 0.4% at 0 to 300 Ohm (3-conductor measurement), 0 to 600 Ohm (3-conductor measurement), 0 to 5000 Ohm (3-conductor measurement, in range of 6000 Ohm);

  • ● Resistance thermometer, relative to input range, (+/-)

0.4%

1 C

Basic error limit (operational limit at 25 C)

  • ● Voltage, relative to input range, (+/-)

0.15%; 0.15% at 250 mV, 500 mV, 1 V, 2.5 V, 5 V, 1 V to 5 V, 10 V; 0.17% at 80 mV; 0.19% at 50 mV; 0.23% at 25 mV

0.1%

  • ● Current, relative to input range, (+/-)

0.15%; at 0 to 20 mA, 5 mA, 10 mA, 20 mA, 4 to 20 mA

0.17%

  • ● 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 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)

  • ● Resistance thermometer, relative to input range, (+/-)

0.3%

0,2 C

Interrupts/diagnostics/status information

Alarms

  • ● Diagnostic alarm

Yes; Parameterizable

Yes; Parameterizable

Yes; Parameterizable

  • ● Limit value alarm

Yes; Parameterizable

Yes

Yes

Potential separation

Potential separation analog inputs

  • ● Potential separation analog inputs

Yes; internal/external

Yes; internal/external

Yes; internal/external

  • ● between the channels

No

Yes

No

Isolation

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 V DC between L+/M and local ground

1500 V DC

1500 V DC

Dimensions

Width

25mm

25mm

25mm

Height

290mm

290mm

290mm

Depth

210mm

210mm

210mm

Weights

Weight, approx.

500g

650g

650g

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