ABB AI820 Advanced Analog Input Module for Automation

Description

The ABB AI820 Analog Input Module is a high-accuracy analog acquisition unit designed for AC 800M controllers and the S800 I/O system. It provides4 differential, bipolar channels, each configurable forcurrent or voltage inputs, making it suitable for a wide range of industrial measurement applications. The supported ranges-±20 mA, 0(4)…20 mA, ±10 V, ±5 V, and 0(1)…5 V-allow interfacing with standard transmitters and specialty sensors. The module includesgalvanic isolationbetween channels and the ModuleBus, ensuring noise-free and safe operation. For protection, each current input path includes250 Ω / 5 W resistors, offering temporary overvoltage tolerance (e.g., accidental 24 V connection). As a result, the AI820 is widely adopted across process industries, power generation, and factory automation where stable, accurate analog measurement is crucial.