The SIMATIC S7 400 6ES7431 1KF20 0AB0 is a rack mount industrial automation system characterized by its high-quality performance. With a standard size and sleek black color, this system operates at a frequency of 50/60 Hertz (HZ). It comes with a 1-year warranty, ensuring reliability and durability for your industrial automation needs. Whether you are an exporter, manufacturer, supplier, or trader, this system is designed to meet your automation requirements efficiently.

Data Sheet 6ES7431-1KF20-0AB0

SIMATIC S7-400 | Analog Input Module SM 431

Isolated 8 AI, 14-bit resolution, Voltage/Current/Resistance, Cycle time 0.416 ms

Supply Voltage

Load Voltage L+

• Rated value (DC): 24 V (required only for 2-wire transmitters)

• Reverse polarity protection: Yes

Input Current

• From load voltage L+ (without load), max.: 200 mA (for 8 2-wire transmitters)

• From backplane bus 5 V DC, max.: 1000 mA

Power Loss

• Typical power loss: 4.9 W

Analog Inputs

• Number of analog inputs: 8

  • For voltage/current: 8

  • For resistance: 4

Permissible Limits

• Max input voltage (voltage input): 18 V continuous, 75 V for 1 ms

• Max input current (current input): 40 mA

• Measurement current for resistance: 1.67 mA (typ.)

Input Ranges

Voltage

Current

Resistance

• Range: 0 to 600

Cable Length

• Shielded: max. 200 m

Analog Value Generation

• Resolution (with overrange): 14-bit

• Integration time: Parameterizable

• Basic conversion time: 52 s

• Input filter time constant: 15 s

• Module execution time (all channels enabled): 0.42 ms

• Interference suppression frequencies: None / 400 / 60 / 50 Hz

Encoder Connection

• Voltage measurement: Supported

• Current measurement:

  • 2-wire: Yes

  • 4-wire: Yes

• Resistance measurement:

  • 2-wire / 3-wire / 4-wire: Yes

Accuracy / Errors

Operational Error Limits

• Voltage: 0.7%

• Current: 0.8%

• Resistance: 1%

Basic Error at 25C

• Voltage: 0.6%

• Current: 0.7%

• Resistance: 0.7%

• Temperature coefficient: 0.03% / K

Diagnostics

• Diagnostics: No

Isolation & Potential Separation

• Analog inputs: Potentially separated internal/external

• Between channels: No

• Between channels & backplane bus: Yes

• Between channels & L+: Yes

Isolation Test Voltages

• 2120 V DC between bus & analog section

• 500 V DC between bus & local ground

• 2120 V DC between analog section & local ground

• 2120 V DC between L+/M & local ground

Mechanical Data

• Width: 25 mm

• Height: 290 mm

• Depth: 210 mm

• Weight: approx. 500 g 

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