ABB | Analog Input Module | AI845

ABB AI845 S800 High-Availability Analog Input Module: 8-Channel with Redundancy

Detailed Technical Specifications

• Brand: ABB
• Model: AI845 (Article 3BSE023675R1)
• Type: High-Availability Analog Input Module for S800
• Number of Channels: 8 (configurable per channel with TU844/TU845)
• Signal Ranges: 0-20mA, 4-20mA, 0-5V, 1-5V DC
• Resolution: 12 Bit
• Voltage Input Impedance: >10 MΩ
• Current Input Impedance: 250 Ω
• Maximum Non-Destructive Input Voltage: 11 V DC
• Measurement Error: Maximum 0.1% of range
• Temperature Drift: Maximum 50 ppm/°C
• Update Cycle Time: 10 ms
• Input Filter Rise Time (0-90%): 290 ms
• Normal Mode Rejection Ratio (NMRR): >40 dB at 50/60 Hz
• Under/Over Range: 0/+15% (0-20mA, 0-5V); -12.5%/+15% (4-20mA, 1-5V)
• Maximum Field Cable Length: 600 meters
• Power Dissipation: 3.5 Watts
• Current Consumption (External 24V): Max. 265 mA
• Rated Insulation Voltage: 50 V
• Dielectric Test Voltage: 500 V AC

Environmental Ratings and Compliance

• Operating Temperature: 0 to +55 °C (approved range +5 to +55 °C)
• Storage Temperature: -40 to +70 °C
• Relative Humidity: 5 to 95%, non-condensing
• Pollution Degree: 2
• Protection Class: IP20
• Corrosion Protection: ISA-S71.04 G3
• Safety Standards: EN/UL 61010-1, EN/UL 61010-2-201
• Hazardous Location Approvals: Class I Div 2, ATEX Zone 2
• Marine Certifications: BV, DNV, LR
• EMC Standards: EN 61000-6-2, EN 61000-6-4
• RoHS Compliance: Yes (Directive 2011/65/EU) 

Frequently Asked Questions (FAQ)

• Q: What makes the AI845 suitable for critical applications?
  A: The ABB AI845 supports redundant operation and has comprehensive diagnostics for high-availability systems.
• Q: Can I configure each channel separately for voltage or current?
  A: Yes, with MTU TU844 or TU845, each of the 8 channels on the AI845 can be configured individually.
• Q: Does this module support HART communication?
  A: Yes, the AI845 features true HART pass-through communication capability on all channels.
• Q: What diagnostic capabilities does the module offer?
  A: It provides three levels: Module Error, Internal Channel Error, and External Channel Error monitoring.
• Q: Does the module provide power to field transmitters?
  A: Yes, it distributes supervised and current-limited transmitter power to each channel.
• Q: What is the maximum input voltage protection?
  A: The AI845 inputs can withstand overvoltage/undervoltage up to 11V DC without damage.
• Q: What MTU units are compatible with this module?
  A: It works with multiple ABB MTUs including TU844, TU845, TU810, TU830, TU854 and others with keying code CC.
• Q: What resolution does this analog input module provide?
  A: The module offers 12-bit resolution for precise analog-to-digital conversion.
• Q: What is your shipping policy for this high-availability module?
  A: We ship worldwide within 5 days via major carriers and offer a 30-day return policy.