ABB AI810 Analog Input Module – 8-Channel Voltage/Current with HART Compatibility

Product Overview

When a process control system demands precise analog signal acquisition from multiple sensors while ensuring robust protection against overvoltage and short circuits, the ABB AI810 analog input module delivers a reliable solution. This 8-channel module accepts unipolar single-ended inputs in standard ranges: 0...20 mA, 4...20 mA, 0...10 V, or 2...10 V DC. Each channel can be configured for voltage or current, and the current input can withstand a short circuit to the transmitter supply of at least 30 V DC without damage, thanks to PTC resistor current limiting. The voltage input similarly tolerates over or undervoltage of at least 30 V DC. With 12-bit resolution and groupwise isolation from ground, the AI810 ensures accurate data conversion and noise immunity in demanding industrial environments.

Technical Specifications Breakdown

The AI810 provides 8 channels in one isolated group, with an input impedance of 290 kΩ for voltage inputs and 230–275 kΩ for current inputs (including the PTC). Its 12-bit resolution delivers fine granularity for process signals. The module features an update cycle time of 8 ms and an input filter rise time (0-90%) of 140 ms, balancing speed and noise rejection. Under/over range capability of -5% / +15% allows measurement slightly beyond nominal spans. Maximum error is only 0.1%, with temperature drift typically 70 ppm/°C (voltage) and 50 ppm/°C (current). The AI810 withstands HART communication, enabling smart field device integration. Power dissipation is 1.5 W, with current consumption of 70 mA on +5 V Modulebus and 40 mA on +24 V Modulebus.

Industry Applications

In chemical processing plants, the AI810 reliably reads 4-20 mA loop-powered transmitters for pressure, temperature, and flow, while its 30 V DC short-circuit protection prevents damage from accidental wiring faults. For water treatment facilities, the module handles 0-10 V signals from level sensors and pH probes, with HART compatibility allowing remote diagnostics. The 600-meter maximum field cable length supports distributed field wiring across large facilities, and the group isolation minimizes ground loop interference.

Installation & Setup Guidance

Mount the AI810 in an S800 I/O system using compatible MTUs such as TU810, TU812, TU814, TU818, TU830, TU833, TU835, TU838, or TU850. The module uses keying code AE for proper insertion. Connect transmitter supply to L1+, L1- and/or L2+, L2- as needed. Ensure field wiring does not exceed 600 meters (656 yards). For vertical mounting in a compact MTU, the maximum ambient temperature is 40 °C (104 °F); otherwise, the module operates from 0 to +55 °C (+32 to +131 °F). The protection class is IP20 according to IEC 60529.

Maintenance & Reliability

Routine inspection of the AI810 includes verifying that front LEDs (Fault, Run, Warning) indicate normal operation. The module supervises internal power supply and provides status indications for Module Error, Module Warning, and Channel Error. Operating in environments with pollution degree 2 (IEC 60664-1) and corrosion protection class G3 (ISA-S71.04) ensures long-term reliability. Storage temperature range is -40 to +70 °C (-40 to +158 °F). Regular checks of field wiring and transmitter supply connections help maintain signal integrity.

Compatibility & Integration

The AI810 is part of the ABB S800 I/O family and works seamlessly with the TU810V1 MTU. It is compatible with a wide range of MTUs: TU810, TU812, TU814, TU818, TU830, TU833, TU835, TU838, and TU850. The module supports HART communication for smart transmitter integration. Certifications include CE, electrical safety per EN 61010-1 and UL 61010-1, hazardous location approvals (C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2), and marine certifications from ABS, BV, DNV, and LR. EMC compliance meets EN 61000-6-4 and EN 61000-6-2.

Selection Guide & Purchasing Advice

Before ordering, verify that your system uses an S800 I/O base and that the MTU matches the AI810 (keying code AE). Confirm signal type and range requirements (0-20 mA, 4-20 mA, 0-10 V, or 2-10 V). The AI810 is not intrinsically safe and does not support redundancy or high integrity configurations. For current availability and lifecycle status, please contact BluePLC Industrial. As a trusted supplier of industrial automation parts, BluePLC Industrial can help you source the ABB AI810 (3BSE008516R1) and provide guidance on compatible MTUs and accessories.