3BSE023675R2 | AI845 | ABB S800 I/O HART Analog Input

ABB AI845 3BSE023675R2 Analog Input 8 Ch. Redundant Module

Product Description

The AI845 (Part Number: 3BSE023675R2), specifically the AI845-eA variant, is a high-availability analog input module engineered for the ABB S800 I/O system. This module is designed for mission-critical applications where signal continuity is paramount, offering 8 channels of high-precision data acquisition. It supports both standard and redundant configurations, allowing two modules to be paired to ensure that a single hardware failure does not interrupt process monitoring.

Engineered with advanced HART communication capabilities, the AI845 3BSE023675R2 allows for the transmission of secondary process variables and remote device diagnostics over the standard 4–20 mA loop. The module provides internal galvanic isolation and is built to withstand the rigorous electromagnetic conditions of power generation and petrochemical facilities. With its 16-bit resolution and support for both current and voltage signals, the AI845 ensures deterministic performance within ABB 800xA and Freelance distributed control systems.

Detailed Technical Specifications

The AI845 delivers high-density signal processing with integrated safety and redundancy features.

• Manufacturer: ABB

• Model Number: AI845 / AI845-eA

• Part Number: 3BSE023675R2 (Supersedes 3BSE023675R1)

• Product Type: Analog Input Module

• Number of Channels: 8 Differential Channels

• Input Signal Range: 4–20 mA, 0–20 mA, or 0–10 V DC

• A/D Resolution: 16 bits

• Communication: HART pass-through support (Version 5, 6, and 7)

• Redundancy: Supports 1:1 hardware redundancy

• Accuracy: ±0.1% of full scale

• Input Impedance: 250 Ω (Current mode) / >1 MΩ (Voltage mode)

• Isolation: 50 V continuous (Galvanic isolation between channels and System)

• Power Supply: 24 VDC (Loop-powered via MTU)

• Operating Temperature: -20°C to +60°C (-4°F to +140°F)

• Dimensions: 119 mm x 45 mm x 102 mm

• Weight: 0.35 kg

• Certifications: CE, UL, RoHS, G3 Conformal Coating compliant

• MTU Compatibility: TU810, TU812, TU814, TU830, TU833, TU842 (Redundant), TU843 (Redundant)