3BSE008544R1 ABB AI820 Analog Input Module | 4-Channel

ABB AI820 Analog Input Module: Precision 4-Channel Differential Input

The ABB AI820 Analog Input Module delivers high-precision signal acquisition for demanding industrial applications. This advanced module features four differential bipolar inputs with exceptional 14-bit resolution and wide signal range capability.

Key Features and Technical Specifications

• The AI820 provides four differential bipolar input channels for superior noise rejection
• It supports an extensive range of signals from -20 to +20 mA and -10 to +10 V
• High 14-bit resolution plus sign ensures exceptional measurement accuracy
• Voltage input impedance measures 200 kΩ in common mode and 800 kΩ in normal mode
• Current input features 250 Ω resistance with robust 5W power-rated sense resistors
• The module withstands accidental normal mode connections up to 30V DC
• It fully supports HART communication across all four input channels
• Fast 40 ms input filter rise time provides excellent signal stability
• Supports field cable lengths up to 600 meters (656 yards)

Advanced Signal Capabilities

• Handles bipolar signals including -20...+20 mA, -10...+10 V, and -5...+5 V
• Also supports unipolar ranges: 0-20 mA, 4-20 mA, 0-10 V, 2-10 V, and 1-5 V
• Differential input design provides superior common-mode noise rejection
• Under/over range monitoring capability of ±15% for signal validation
• Maximum error margin of 0.1% ensures measurement reliability
• Low temperature drift: 70 ppm/°C max for voltage, 50 ppm/°C max for current
• Module distributes external transmitter supply to each channel individually

Robust Design and Environmental Ratings

• All four channels feature group-wise isolation from ModuleBus for safety
• Operating temperature range spans from 0 to +55°C for reliable performance
• Storage temperature range extends from -40 to +70°C for harsh conditions
• Handles 5-95% relative humidity in non-condensing environments
• IP20 protection rating according to IEC 60529 standards
• ISA-S71.04 G3 corrosion protection ensures long-term reliability
• Compact S800 mechanics design with 45mm width for space efficiency
• Lightweight construction at only 0.2 kg for easy installation

Installation and Compatibility

• Compatible with multiple MTU types including TU810, TU812, TU814, TU830, and TU833
• Uses keying code BB for proper module identification and prevention of misinsertion
• Compact dimensions: 45mm width × 102mm depth × 119mm height
• Standard industrial protection class IP20 according to IEC 60529
• Designed for pollution degree 2 environments per IEC 60664-1
• Dielectric test voltage rating of 500V AC ensures insulation integrity
• Rated insulation voltage of 50V for safe industrial operation

Power Requirements and Diagnostics

• Power dissipation of 1.7 W for efficient system operation
• Draws 80 mA from the +5V Modulebus supply for internal processing
• Uses 70 mA from external +24V power source for transmitter supply
• Three front LED indicators display Fault, Run, and Warning status clearly
• Comprehensive diagnostics include Module Error and Channel error monitoring
• Internal power supply supervision ensures consistent operational reliability
• Transmitter power current limiting provided through matched MTU units

Frequently Asked Questions (FAQ)

• What makes the AI820 different from other analog input modules?
  The AI820 features true differential bipolar inputs with 14-bit plus sign resolution for high-precision measurements.
• How many input channels does the module provide?
  The AI820 offers four differential analog input channels with individual signal conditioning.
• What signal ranges are supported?
  It handles both bipolar and unipolar signals including -20...+20 mA, -10...+10 V, and standard 4-20 mA/0-10 V ranges.
• Is the module protected against wiring errors?
  Yes, it withstands accidental 30V DC connections and features high-power 5W current sense resistors for protection.
• Which MTU units are compatible with this module?
  It works with TU810, TU812, TU814, TU830, and TU833 MTU units using keying code BB.

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