ABB AI830A Analog Input Module for RTD Temperature Measurement

Product Introduction

When precise temperature measurement is critical in industrial processes, the ABB AI830A Analog Input Module delivers reliable performance. Part of the ABB S800 I/O family, this module provides 8 channels for resistive temperature detectors (RTDs) such as Pt100, Cu10, Ni100, and Ni120. It supports 3-wire connections, ensuring accurate readings by compensating for lead resistance.

Technical Specifications Breakdown

The AI830A offers 14-bit resolution for high-accuracy temperature conversion. Its update cycle time is 150 + 95 * (number of active channels) ms, allowing fast data acquisition. The module provides groupwise isolation from ground, enhancing noise immunity. With a common-mode rejection ratio (CMRR) greater than 120 dB at 50/60 Hz and a normal-mode rejection ratio (NMRR) greater than 60 dB, it filters out electrical interference effectively. Power dissipation is only 1.6 W, and current consumption is 70 mA on the +5 V Modulebus and 50 mA on the +24 V Modulebus.

Industry Applications

In chemical processing plants, the AI830A monitors reactor temperatures using Pt100 sensors, ensuring safe operation. In HVAC systems, it tracks air handling unit temperatures with Ni100 sensors.

Installation & Setup Guidance

Mount the AI830A on a DIN rail within an S800 I/O system. Use compatible termination units such as TU810, TU812, TU814, TU830, or TU833. Connect RTDs using 3-wire configuration, ensuring all sensors are isolated from ground. Configure each channel individually via the control system, setting the MainsFreq parameter to 50 Hz or 60 Hz for optimal filtering.

Maintenance & Reliability

Regularly inspect the module for environmental factors. The AI830A operates from 0 to +55 °C and stores from -40 to +70 °C. It has an IP20 protection class and complies with ISA-S71.04 G3 corrosion protection standards. Front LEDs indicate fault, run, and warning statuses, simplifying diagnostics. Supervision features detect open-circuit, short-circuit, and grounded sensor conditions.

Compatibility & Integration

It supports various RTD types and resistive sensors. The module is CE marked and meets electrical safety standards EN 61010-1 and UL 61010-1. It also carries hazardous location certifications for Class I Division 2 and Zone 2.

Selection Guide & Purchasing Advice

Before ordering, verify that your system supports the AI830A and that you have the correct termination unit. AutoDCSTech offers this module with fast shipping and expert support. Contact us to confirm availability and compatibility for your application.