ABB AI950N 3KDE175523L9500 Temperature Input Module for S900 I/O

Product Overview

When precise temperature measurement and reliable signal conditioning are critical in industrial processes, the ABB AI950N 3KDE175523L9500 Temperature Input Module delivers robust performance. This module is part of the ABB S900 I/O system, designed for installation in safe (non-hazardous) areas. It supports a wide range of temperature sensors and offers channel-to-channel isolation for enhanced signal integrity.

Technical Specifications Breakdown

The AI950N provides four analog input channels for temperature measurement. It accepts Pt100, Pt1000, and Ni100 resistance temperature detectors (RTDs) in 2-, 3-, or 4-wire configurations, as well as thermocouple types B, E, J, K, L, N, R, S, T, U, and mV signals. Each input is electrically isolated from the others, from the bus, and from the power supply, minimizing noise and ground loop issues. The module includes internal or external cold junction compensation for thermocouple measurements and features short-circuit and break detection.

Industry Applications

In process industries such as chemical, petrochemical, and power generation, the AI950N monitors critical temperature points in reactors, heat exchangers, and pipelines. Its ability to handle multiple sensor types makes it versatile for retrofitting older installations. The module's hot swap functionality allows replacement without interrupting primary voltage, reducing downtime during maintenance.

Installation & Setup Guidance

The AI950N mounts directly onto the S900 I/O backplane in a safe area. Ensure the module is correctly keyed for the slot. Connect RTD or thermocouple wires to the appropriate terminals, observing polarity and wire type. For 3-wire RTDs, use the common compensation lead. Configure the sensor type and cold junction compensation via the FDT/DTM software. Verify proper grounding and isolation to prevent measurement errors.

Maintenance & Reliability

The AI950N features auto-diagnostics and extended diagnostic capabilities that simplify troubleshooting. The G3 coating protects against corrosive atmospheres per ISA-S71.04 G3. Regular inspection of connections and environmental conditions helps maintain accuracy. The module's robust design supports long service life in demanding industrial environments.

Compatibility & Integration

The AI950N communicates with control systems via PROFIBUS DP, a standard fieldbus protocol. The module supports HART protocol for additional process variable data. Use FDT/DTM for configuration and diagnostics. The S900 I/O system also offers power and communication redundancy options.

Selection Guide & Purchasing Advice

When ordering the ABB AI950N, verify the article number 3KDE175523L9500 to ensure compatibility with your S900 I/O system. Confirm that your system variant is for safe area installation. The module weighs 0.13 kg and measures 20 mm wide, 104 mm deep, and 104 mm high. For current availability and lifecycle status, contact AutoDCSTech. Our team can help you select the right components for your application.