The ABB AI531 is an analog input module used in ABB control systems.

It is part of the Advant 800xA and Advant OCS series of distributed control systems (DCS). The module provides 8 analog input channels for the controller, which can be used to connect to a variety of sensors and transmitters.

Key Features:

• 8 analog input channels
• Supports a variety of input types, including voltage, current, RTDs, thermocouples, and potentiometers
• High resolution and accuracy
• Galvanic isolation between channels
• Fault detection and diagnostics

Applications:

• Industrial automation
• Process control
• Building automation
• Power generation and distribution

Technical Specifications:

• Input range: -20 mA to +20 mA, 0 mA to 20 mA, 4 mA to 20 mA, -10 V to +10 V, 0 V to +10 V
• Resolution: 15 bits
• Accuracy: ±0.1% of full scale
• Input impedance: Voltage: >100 kΩ, Current: ca. 330 Ω
• Time constant: 1 ms, 100 ms (50 Hz / 60 Hz)
• Power supply: 24 VDC
• Operating temperature: -40 to 70°C
• Humidity: 5 to 95% RH, non-condensing

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