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Data Sheet – 6ES7231-4HD32-0XB0

SIMATIC S7-1200 – Analog Input Module SM 1231 4 Analog Inputs (AI), ±10 V / ±5 V / ±2.5 V or 0-20 mA / 4-20 mA, 12-bit + sign (13-bit ADC)

General Information

• Product type designation: SM 1231, AI 4×13 bit

Supply Voltage

• Rated value (DC): 24 V

Input Current

• Typical: 45 mA

• From backplane bus 5 V DC: typ. 80 mA

Power Loss

• Typical: 1.5 W

Analog Inputs

• Number of inputs: 4 (current or voltage differential inputs)

• Permissible input voltage (destruction limit): max 35 V

• Permissible input current (destruction limit): max 40 mA

• Cycle time (all channels): max 625 μs

Input Ranges

• Voltage: ±10 V, ±5 V, ±2.5 V

  • Input resistance: ≥9 MΩ

• Current: 0-20 mA, 4-20 mA

  • Input resistance: 280 Ω

Analog Value Generation

• Resolution: 12-bit + sign

• Integration time: parameterizable

• Interference voltage suppression: 40 dB, DC to 60 V at 50/60 Hz

• Smoothing of measured values: parameterizable (None / Low / Medium / High)

Errors / Accuracies

• Temperature error: ±0.1% at 25°C, ±0.2% at 55°C

• Basic error limit at 25°C:

  • Voltage: ±0.1%

  • Current: ±0.1%

• Common mode voltage: max 12 V

Diagnostics / Status

• Alarms: Yes

• Diagnostic functions: Yes (monitor supply voltage, wire-break)

• LED indication: Yes (for inputs and maintenance)

Protection Class

• IP rating: IP20

Environmental / Ecological

• Environmental product declaration: Yes

• Global warming potential (CO₂ eq):

  • Total: 43.1 kg

  • Production: 7.62 kg

  • Operation: 36 kg

  • End of life: -0.544 kg

Ambient Conditions

• Operation temperature: -20°C to 60°C (horizontal), -20°C to 50°C (vertical)

• Storage temperature: -40°C to 70°C

• Air pressure (operation): 795 – 1080 hPa

• Air pressure (storage/transport): 660 – 1080 hPa

• Relative humidity: max 95% at 25°C, no condensation

• Pollutant concentrations: SO₂ < 0.5 ppm, H₂S < 0.1 ppm, RH < 60%

Mechanics / Material

• Enclosure material: Plastic

• Dimensions: W 45 × H 100 × D 75 mm

• Weight: approx. 180 g

• Connection method: Required front connector 

Technical Details