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The compact analog input module AI208/SI offers 8 individual galvanically isolated current inputs. The measuring range is +/- 24.6 mA and covers standards 4 to 20 mA, 0 to 20 mA and -20 to +20 mA. Via adjustable measuring range limits errors, such as short circuit, sensor defect or wire break can be easily detected. Threshold values that can be configured within the measuring range permit monitoring of the process factor without having to sample it. The shunt is protected against short circuit of the 24 V supply, which can easily occur with the sensor wiring. Robustness and above-average diagnostic capabilities are the outstanding characteristics of this input module.



  • 8 analog inputs
  • Input current 0 to 20 mA, 4 to 20 mA, -20 to +20 mA
  • Input impedance approx. 200 Ω
  • Resolution: 13 to 16 bit
  • Adjustable input filter 2.5 kHz to 2.5 Hz

Approvals / Certificates

System overview