Analogue Module 4AI

The Siemens 6ES7231-4HD32-0XB0 is a SIMATIC S7-1200 analogue input module (SM 1231, AI 4x13 bit), designed for industrial automation and process control applications requiring precise measurement of voltage or current signals.

• Inputs: 4 analogue inputs (current or voltage, differential)

• Input Ranges:

  • Voltage: ±10 V, ±5 V, ±2.5 V

  • Current: 0–20 mA, 4–20 mA

• Resolution: 12-bit plus sign (13-bit ADC for current)

• Input Resistance:

  • Voltage: ≥9 MΩ

  • Current: 280 Ω

• Maximum Input (Destruction Limit):

  • Voltage: 35 V

  • Current: 40 mA

• Cycle Time: Maximum 625 µs for all channels

• Power Supply: 24 V DC (typical current consumption 45 mA from 24 V DC, 80 mA from backplane bus at 5 V DC)

• Power Loss: 1.5 W

• Dimensions: 45 x 100 x 75 mm (W x H x D)

• Weight: Approx. 180 g

• Protection Class: IP20

• Operating Temperature: -20°C to +60°C

• Diagnostics: LED status indicators and diagnostic functions

• Accuracy:

  • Voltage: ±0.1% of input range at 25°C

  • Current: ±0.1% of input range at 25°C

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

• Interference Suppression: 40 dB for 50/60 Hz