Product details
Product Overview
ABB AI845 3BSE023675R1 is a high-performance Analog Input Module for S800 I/O systems. It supports single or redundant applications with 8 channels. Each channel accepts 0-20mA, 4-20mA, 0-5V, or 1-5V signals. HART pass-through communication enables smart device integration. Built-in current limited transmitter supply per channel simplifies wiring. Advanced on-board diagnostics monitor channel and module health.
Model Structure: AI845
- AI
- Type: Analog Input Module
- 8
- Channel Count: 8 channels
- 45
- Variant: HART capable, redundant capable, group isolated
Key Specifications
- Brand: ABB
- Model: AI845 (3BSE023675R1)
- Product Type: Analog Input Module for S800
- Channels: 8, single ended unipolar
- Signal Range: 0-20mA, 4-20mA, 0-5V, 1-5V DC
- Resolution: 12 bit
- Input Impedance: 10 MΩ (voltage), 250 Ω (current)
- HART Communication: Yes, pass-through
- Redundancy: Yes, single or redundant operation
- Isolation: Groupwise 8 channels isolated from ground
- Error Max: 0.1%
- Temperature Drift: 50 ppm/°C max
- Update Cycle: 10 ms
- Input Filter: 290 ms rise time (0-90%)
- NMRR: >40 dB at 50/60 Hz
- Max Cable Length: 600 meters
Power & Protection
- Transmitter Supply: Current limited per channel
- Overvoltage Protection: Withstands ±11V DC
- Power Dissipation: 3.5 W
- Current Consumption:
- +5V Modulebus: 100 mA
- +24V Modulebus: 50 mA
- +24V External: 265 mA max
Diagnostics & LEDs
- Front LEDs: F (Fault), R (Run), W (Warning)
- Module Supervision: Analog readback, reference voltage, internal supply, checksum, watchdog, memory
- Channel Supervision: Low pass filter, multiplexer, test channel
- External Supervision: External power low, transmitter power, shunt error
- Status Indication: Module Error, Module Warning, Channel Error
Environmental & Certifications
- Operating Temperature: 0 to +55°C (+32 to +131°F)
- Storage Temperature: -40 to +70°C (-40 to +158°F)
- Relative Humidity: 5 to 95% non-condensing
- Protection Class: IP20
- Corrosion Protection: ISA-S71.04 G3
- CE Mark: Yes
- Safety: EN 61010-1, UL 61010-1
- Hazardous Location: C1 Div 2, C1 Zone 2, ATEX Zone 2
- Marine: BV, DNV, LR approved
- EMC: EN 61000-6-4, EN 61000-6-2
- RoHS/WEEE: Compliant
Physical Dimensions
- Width: 45 mm (1.77″)
- Depth: 102 mm (4.01″), 111 mm with connector
- Height: 119 mm (4.7″)
- Weight: 0.23 kg (0.51 lbs)
Compatible MTUs
Installation Guide
- Mounting: Install in S800 I/O rack with compatible MTU.
- Wiring: Use TU844 or TU845 for per-channel voltage/current selection.
- Redundancy: Install two modules for redundant operation.
- Grounding: Follow S800 grounding guidelines.
Package Contents
- Includes: ABB AI845 module, product documentation.
- Warranty: 12 months against manufacturing defects.
- Note: MTU ordered separately.
Shipping Options
- Couriers: FedEx, UPS, DHL express worldwide.
- Packaging: Anti-static protective box.
Typical Applications
- Process Automation: Connect 2-wire and 3-wire transmitters.
- HART Networks: Pass-through communication for smart devices.
- Redundant Systems: Critical loop monitoring with backup.
- Remote I/O: Long distance signal transmission up to 600m.
Expert FAQs
- Q: Can I mix voltage and current inputs on same module?A: Yes, if using TU844 or TU845 MTU. Each channel configures individually. Other MTUs force all channels same type.
- Q: How does redundancy work with AI845?A: Install two modules on redundant MTU. One acts as primary, other as backup. Switchover automatic on fault.
- Q: What is HART pass-through used for?A: It lets you communicate with smart transmitters through the module. Use for configuration and diagnostics.
- Q: How do I select correct MTU for AI845?A: For mixed voltage/current, choose TU844 or TU845. For all voltage or all current, any listed MTU works.
- Q: What does the green LED indicate?A: Green R (Run) LED on means module working. F (Fault) red indicates error. W (Warning) yellow for caution.
- Q: Can I use this in hazardous areas?A: Yes, ATEX Zone 2 and Class 1 Div 2 certified. Install in appropriate enclosure.
- Q: What is maximum transmitter current per channel?A: Built-in current limiting protects supply. Total external current 265 mA max for module.
- Q: How fast is module update?A: Cycle time 10 ms. Input filter adds 290 ms rise time for noise rejection.
- Q: Does 12-month warranty cover diagnostics?A: Yes, warranty covers defects. On-board diagnostics help identify issues quickly.
Selection Guide
- Choose AI845 if: You need 8 analog inputs with HART. Redundancy required. Mixed signal types needed with proper MTU.
- Alternative: For non-HART, consider AI845 without HART. For isolated channels, use AI810 or AI820 series.
- MTU Tip: Order TU844 or TU845 for maximum flexibility. Allows per-channel voltage/current selection.
- Redundancy Planning: Use redundant MTU and two AI845 modules. Test failover during commissioning.
- Cable Length: 600m maximum. Use shielded twisted pair for best noise immunity.
For inquiries: sales@powergearx.com | +86 18030005825 (WhatsApp)
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Original Source: https://www.powergearx.com/
Daniel Brooks –
The ABB AI845 analog input module was purchased for a chemical processing application using S800 I/O. The module arrived in brand-new condition with original packaging. After installation, all 8 channels performed accurately, including HART communication with field instruments. Signal stability and data accuracy met ABB specs perfectly. PowerGearX provided professional pre-sale support to confirm compatibility, which gave us confidence before ordering. Shipping was fast and well-packed. This module is now running in a continuous process environment without any issues. Very satisfied with both the product quality and the service level.