Definition

The AI880A 3BSE039293R1 is a High Integrity Analog Input Module within ABB's S800 I/O family, purpose-built for integration with the System 800xA distributed control platform. It provides 8 current input channels supporting both 0…20 mA and 4…20 mA single-ended unipolar inputs, with a fixed input resistance of 250 Ω and 12-bit resolution.

For deployment in both single and redundant configurations, the AI880A enables fault-tolerant analog signal acquisition without requiring external voter hardware. In redundant mode, two modules process identical field signals in parallel, delivering the high availability required for safety loops.

The AI880A incorporates advanced on-board diagnostics, including configurable over-range and under-range alarm limits compliant with NAMUR NE43, loop supervision, and a configurable alarm limit for field power outputs. It also supports HART pass-through communication, allowing asset management applications to access HART device parameters without additional hardware. Compatible termination units include TU834, TU844, TU845, and TU854.

Model Features

Module type: High Integrity Analog Input Module for S800 I/O
Channels: 8 current inputs, single-ended unipolar, one isolated group
Signal range: 0…20 mA / 4…20 mA, 250 Ω input resistance, 12-bit resolution
Physical form: Standard S800 I/O module, DIN-rail mount, yellow front panel with F/R/W/PRI status LEDs
Power: 24 V ModuleBus-powered; built-in supervised, current-limited transmitter supply per channel
Configuration: Single or redundant module operation
Communication: HART pass-through supported
Diagnostics: On-board diagnostics with NAMUR NE43 configurable over/under range limits
Safety rating: SIL 3 (IEC 61508), Category 4 (EN 954-1)
Termination units: TU834, TU844, TU845, TU854

Parameters Specifications

The difference between AI880A 3BSE039293R1 and AI890 3BSC690071R1

Frequently Asked Questions

Does the AI880A support HART communication?
Yes. The AI880A supports HART pass-through communication, allowing asset management tools to access HART device data over the 4…20 mA loop.

What is the difference between single and redundant configuration for the AI880A?
In single configuration, one AI880A module handles all 8 channels. In redundant configuration, two AI880A modules operate in parallel with the same input signals, providing fault tolerance through hardware redundancy without external voter modules.

Can the AI880A power 2-wire field transmitters directly?
Yes. The module distributes transmitter supply to each channel. The supply is supervised and current-limited, enabling direct connection to 2-wire and 3-wire transmitters without additional external power supplies.

What does NAMUR NE43 compliance mean for the AI880A?
NAMUR NE43 defines standard signal levels for fault detection. The AI880A supports configurable over-range and under-range alarm limits, allowing the control system to distinguish between normal process values, out-of-range conditions, and wire-break/short-circuit faults.

Which termination units are required for the AI880A?
The AI880A is compatible with TU834, TU844, TU845, and TU854 module termination units. Selection depends on whether single or redundant configuration, shielding, and wiring practices are required.

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