ABB AI845 Analog Input Module

Technical Specifications

• Input Channels: 8 channels
• Input Types:
  • Analog voltage: -10 V to +10 V
  • Analog current: 0 mA to 20 mA
• Accuracy: ±0.1%
• Resolution: 16-bit
• Sampling Rate: 100 Hz
• Operating Temperature: -20°C to +60°C
• Storage Temperature: -40°C to +85°C
• Relative Humidity: 5% to 95% (non-condensing)
• Protection Class: IP65
• Input Resistance:
  • Voltage input: >10 MΩ
  • Current input: 250 Ω
• Overvoltage/Undervoltage Protection: Withstands at least 11 V DC

Functional Features

• High Precision: 16-bit resolution ensures accurate signal conversion, minimizing measurement errors.
• Electrical Isolation: Each channel is isolated from the others and from the ground, preventing interference and improving signal stability.
• HART Compatibility: Supports external HART-compatible transmitters, simplifying power distribution to 2-wire or 3-wire transmitters.
• Channel Configuration Flexibility: Each channel can be independently configured for voltage or current input, adapting to diverse sensor types.
• Built-in Diagnostics: Monitors input status for open circuits, short circuits, and overvoltage/undervoltage conditions, enhancing system reliability.
• Compact Design: Space-saving form factor facilitates easy installation in control racks.

Application Scenarios
The ABB AI845 is widely used in industries requiring precise monitoring of process parameters, including:

• Chemical Industry: Monitoring temperature, pressure, and flow in chemical processes.
• Power Generation: Measuring steam pressure, water level, and other critical parameters in power plants.
• Water Treatment: Controlling water quality and flow in wastewater treatment facilities.
• Oil and Gas: Monitoring pipeline pressure and temperature in upstream and downstream operations.
• Pharmaceuticals: Ensuring precise environmental control in manufacturing processes.

Advantages

• Reliable Signal Acquisition: High-precision conversion and isolation design ensure stable and accurate data collection.
• Flexible Configuration: Independent channel settings accommodate various sensor types and measurement ranges.
• Robust Construction: Withstands harsh industrial conditions, including temperature extremes and humidity.
• Easy Integration: Compatible with ABB S800 I/O series and other industrial controllers via standard fieldbus protocols.