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Siemens 6ES7431-1KF20-0AB0

SIMATIC S7-400, analog input SM 431, isolated 8 AI, resolution 14 bit, U/IResistor 8 AI, cycle time 0.416 ms

SiemensMFR # 6ES7431-1KF20-0AB0SKU # CEY-937FC77F8DB1

Reverse polarity protectionYes

from backplane bus 5 V DC, max.1 000 mA

Power loss, typ.4.9 W

Number of analog inputs8

For voltage/current measurement8

For resistance measurement4

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About This Product

SIMATIC S7-400, analog input SM 431, isolated 8 AI, resolution 14 bit, U/IResistor 8 AI, cycle time 0.416 ms

Siemens 6ES7431-1KF20-0AB0

Genuine, certified Siemens product
Fast sourcing through a worldwide supply network
Product selection and compatibility support from our technical team
Equivalent and alternative product suggestions
Quotation and lead time tailored to your request

Specifications

Load voltage L+

Rated value (DC)24 V; Only required for supplying 2-wire transmitters

Reverse polarity protectionYes

Input current

from load voltage L+ (without load), max.200 mA; for 8 connected, fully controlled 2-wire transmitters

from backplane bus 5 V DC, max.1 000 mA

Power loss

Power loss, typ.4.9 W

Analog inputs

Number of analog inputs8

For voltage/current measurement8

For resistance measurement4

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)

permissible input current for current input (destruction limit), max.40 mA; Permanent

Constant measurement current for resistance-type transmitter, typ.1.67 mA

Input ranges

VoltageYes

CurrentYes

ThermocoupleNo

Resistance thermometerNo

ResistanceYes

Input ranges (rated values), voltages

1 V to 5 VYes

— Input resistance (1 V to 5 V)10 MΩ

-1 V to +1 VYes

— Input resistance (-1 V to +1 V)10 MΩ

-10 V to +10 VYes

— Input resistance (-10 V to +10 V)100 kΩ

Input ranges (rated values), currents

-20 mA to +20 mAYes

— Input resistance (-20 mA to +20 mA)50 Ω

4 mA to 20 mAYes

— Input resistance (4 mA to 20 mA)50 kΩ

Input ranges (rated values), resistors

0 to 600 ohmsYes

Cable length

shielded, max.200 m

Integration and conversion time/resolution per channel

Resolution with overrange (bit including sign), max.14 bit; 14 / 14 / 14

Integration time, parameterizableYes

Basic conversion time (ms)52 µs

Interference voltage suppression for interference frequency f1 in Hznone / 400 / 60 / 50 Hz

Time constant of the input filter15 µs

Basic execution time of the module (all channels released)0.42 ms

Connection of signal encoders

for voltage measurementYes; possible

for current measurement as 2-wire transducerYes

for current measurement as 4-wire transducerYes

for resistance measurement with two-wire connectionYes; Line resistances are also measured

for resistance measurement with three-wire connectionYes; Line resistances are also measured

for resistance measurement with four-wire connectionYes

Errors/accuracies

Temperature error (relative to input range), (+/-)0.03 %/K

Operational error limit in overall temperature range

Voltage, relative to input range, (+/-)0.7 %; ±0.7 % at ±1 V; ±0.9 % at ±10 V, 1 to 5 V

Current, relative to input range, (+/-)0.8 %; at ±20 mA, 4 to 20 mA

Resistance, relative to input range, (+/-)1 %

Basic error limit (operational limit at 25 °C)

Voltage, relative to input range, (+/-)0.6 %; 0.6 % at ±1 V; 0.75 % at ±10 V, 1 to 5 V

Current, relative to input range, (+/-)0.7 %; at ±20 mA, 4 to 20 mA

Resistance, relative to input range, (+/-)0.7 %; 0 to 600 ohms

Interrupts/diagnostics/status information

Diagnostics functionNo

Potential separation analog inputs

Potential separation analog inputsYes; internal/external

between the channelsNo

between the channels and backplane busYes

Between the channels and load voltage L+Yes

Isolation

Isolation tested with2 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

Dimensions

Width25 mm

Height290 mm

Depth210 mm

Weights

Weight, approx.500 g

Accessories 1

Genuine accessories that can be used with the Siemens 6ES7431-1KF20-0AB0 motor and are supplied separately are listed below. Click a code to open the accessory page and see the other compatible motors.