The SIMATIC S7-400 6ES7431-7KF00-0AB0 is an advanced automation solution designed for high-performance industrial applications. Engineered for reliability, this rack-mounted unit operates seamlessly within a temperature range of -20C to +60C, ensuring robust performance even in challenging environments. With a compact design measuring 25 x 290 x 210 mm and a lightweight build of 650 grams, it fits efficiently into existing systems. The product features a 24V DC rated voltage, an input current of 1200 mA, and a power rating of 4.6 W, making it optimal for energy-efficient operations. Its IP20 protection level offers secure usage in controlled environments, while the isolation capacity of 1500 V DC enhances safety and durability. Supporting single-phase power at 50/60 Hz frequency, this unit is built to excel across industries requiring precise automation. With high humidity resistance up to 95%, this product ensures dependable functionality. 

Siemens 6ES7431-7KF00-0AB0

SIMATIC S7-400 Analog Input Module – SM 431 (8 AI, 16-bit, U/I/Thermocouple, Isolated)

Input Current

• From backplane bus (5 V DC): max. 1200 mA

Power Loss

• Typical: 4.6 W

Analog Inputs

• Number of analog inputs: 8

• Voltage/Current measurement: 8 channels

Destruction Limits

• Max permissible input voltage: 35 V continuous, 75 V for 1 s

• Max permissible input current: 32 mA

Supported Input Types

• Voltage: Yes

• Current: Yes

• Thermocouple: Yes

• RTD: No

• Resistance: No

Voltage Input Ranges

• 1 V to 5 V (Input resistance > 2000 Ω)

• -1 V to +1 V

• -10 V to +10 V

• -100 mV to +100 mV

• -2.5 V to +2.5 V

• -20 mV to +20 mV

• -250 mV to +250 mV

• -5 V to +5 V

• -50 mV to +50 mV

• -500 mV to +500 mV

• -80 mV to +80 mV

Current Input Ranges

• 0 to 20 mA

• -10 mA to +10 mA

• -20 mA to +20 mA

• -3.2 mA to +3.2 mA

• 4 mA to 20 mA (Input resistance 50 Ω)

• -5 mA to +5 mA

Thermocouple Types Supported

• Types: B, E, J, K, L, N, R, S, T, U

• Input resistance (Type B, N): > 2000 Ω

Temperature Compensation

• Cold junction connection: Yes (6ES7431-7KF00-6AA0)

• Parameterizable: Yes

• Internal compensation: Yes

• External compensation socket: Yes

• Dynamic reference: Yes

Cable Length

• Shielded: max. 200 m

Analog Value Processing

• Resolution: 16 bit (with overrange)

• Integration time: 2.5 / 16.7 / 20 / 100 ms

• Conversion time: 10 / 16.7 / 20 / 100 ms

• Interference suppression: 400 / 60 / 50 / 10 Hz

Encoder Connections

• Voltage measurement: Yes

• Current (4-wire): Yes

• Resistance (4-wire): Yes

Accuracy

Operational Error (full temperature range)

• Voltage: ±0.3%

• Current: ±0.5%

Basic Error (25 °C)

• Voltage: ±0.1%

• Current: ±0.17%

Diagnostics & Alarms

• Diagnostics: Yes (parameterizable)

• Diagnostic alarm: Yes

• Limit value alarm: Yes

• Hardware interrupt: Yes

• Diagnostic info readable: Yes

Isolation / Potential Separation

• Isolation tested at 1500 V DC

• Channel-to-channel separation: Yes

• Channels to backplane bus: Yes

Dimensions

• Width: 25 mm

• Height: 290 mm

• Depth: 210 mm

Weight

• Approx.: 650 g

Technical Details 

FAQs of SIMATIC S7-400 6ES7431-7KF00-0AB0: