ABB 3BSE023675R1 S800 I/O AI845 Analog Input Module

Description

Designed for highly critical process monitoring environments, the ABB 3BSE023675R1 (AI845) provides high-density analog signal processing within the S800 I/O platform. This module features 8 channels configured for analog inputs with HART pass-through capability, facilitating bidirectional communication with smart field transmitters. Operating under either single or redundant (S/R) configurations, it ensures maximum process uptime and system availability when integrated with compatible redundant terminal units.

The AI845 analog input module interfaces seamlessly with standard 4-20 mA current loops, converting analog field measurements into digital values for control system processing. Built-in transmitter power distribution and channel isolation help protect internal system electronics from field-side electrical disturbances, making it a reliable choice for harsh industrial settings.

Features

• 8 analog input channels configured for standard current signals.
• HART protocol pass-through communication for field device configuration, calibration, and diagnostics.
• Supports single or redundant (S/R) configurations to match application availability requirements.
• Galvanic isolation per channel to shield internal circuitry from electrical noise and surges.
• Hot-swappable design, enabling module replacement under live system power without process interruption.
• Direct integration with ABB Ability System 800xA and other compatible DCS architectures.

Applications

• Process control systems in oil and gas extraction and refining.
• Continuous monitoring in chemical manufacturing plants.
• Power generation facility control loops and burner management systems.
• Municipal water and wastewater treatment instrumentation networks.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mounting: Mount the unit onto a standard DIN rail using the appropriate S800 I/O Module Termination Unit (MTU) such as the TU844 or TU845.
• Grounding: Ensure the MTU grounding terminal is directly connected to the local functional ground bus to maintain signal integrity and shield performance.
• Hot-Swapping: While hot-swapping is supported, confirm there are no hazardous atmospheric conditions present before removing or inserting modules in Class I, Division 2 / Zone 2 environments.
• Cable Routing: Keep analog signal cables and HART communication lines physically separated from high-voltage AC power cabling to prevent electromagnetic interference.