Product Overview

The ABB AI845-EA, identified by part number 3BSE023675R2, is a high-density analog input module designed for the S800 I/O system, primarily utilized within the Advant 800xA and AC 800M controller architectures. This module provides eight independent channels for the precise acquisition of current and voltage signals. A standout feature is its integrated HART (Highway Addressable Remote Transducer) protocol support, which allows for bidirectional communication with smart field devices. This enables the transmission of secondary process variables and advanced device diagnostics directly to the Distributed Control System (DCS) without disrupting the primary 4-20mA analog signal.

Essential Hardware Parameters

• Module Type: Analog Input with HART redundancy support (S/R)

• Order Number: 3BSE023675R2

• Channel Count: 8 Differential Isolated Channels

• Signal Range: 0...20 mA, 4...20 mA, 0...5 V, 1...5 V

• A/D Resolution: 12-bit plus sign

• Protocol Integration: HART Pass-through for smart instrument management

• Isolation: Galvanic isolation between channels and system logic

• Physical Mass: 0.34 kg

• Dimensions: 16cm x 15.5cm x 8cm

• Environmental Protection: Designed for rugged industrial cabinet mounting

Industrial Deployment & Field Applications

The AI845-EA is extensively applied in process-heavy industries such as oil and gas, chemical processing, and pharmaceutical manufacturing. By utilizing its HART capabilities, plant operators can perform remote configuration and predictive maintenance on pressure transmitters, flowmeters, and temperature sensors located in inaccessible or hazardous areas. In power generation, the module ensures high-accuracy monitoring of boiler and turbine parameters, where signal integrity and rapid data refresh rates are critical for safety interlocking. Its redundant (S/R) capability makes it an ideal choice for high-availability systems where the failure of a single input must not result in process shutdown, ensuring continuous operation in mission-critical automation loops.