Analogue Module 8AI

The Siemens 6ES7231-4HF32-0XB0 is an analogue input module (SM 1231) for the SIMATIC S7-1200 series, providing high-performance analogue signal acquisition for industrial automation systems.

• Number of Inputs: 8 analogue inputs

• Input Types: Voltage (±10 V, ±5 V, ±2.5 V) or current (0–20 mA, 4–20 mA), selectable per channel group

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

• Input Resistance:

  • Voltage inputs: ≥9 MΩ

  • Current inputs: 280 Ω

• Power Supply: 24 V DC (typical current consumption: 45 mA from 24 V DC, 90 mA from backplane bus at 5 V DC)

• Power Loss: 1.5 W

• Cycle Time: Maximum 625 µs for all channels

• Protection Class: IP20

• Operating Temperature: -20°C to +60°C (horizontal), -20°C to +50°C (vertical)

• Humidity: Up to 95% (non-condensing)

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

• Weight: Approx. 180 g

• Diagnostics: LED status indicators for input status and maintenance, wire-break detection, and diagnostic alarms

• Approvals: CE, CSA, FM, RCM (formerly C-TICK), Marine