ABB AI893 Analog Input Module

Description

ABB AI893 Analog Input Module is a component of the S800 I/O system, designed for industrial analog signal acquisition and processing. As an analog input module, it supports collection of continuous variable physical parameters including temperature, pressure, liquid level, current, and voltage, which are converted to standard 4-20mA current signals or 0-10V DC voltage signals by field sensors and transmitters for processing. The module features built-in signal conditioning technology, compatible with both low-level inputs from RTD (Resistance Temperature Detector) and TC (Thermocouple) devices, and high-level inputs from standard transmitters. It uses RS-485 bus with MODBUS RTU protocol for reliable data transmission to upper control systems, enabling unified integration with industrial field data acquisition systems. Key protective features include EMC protection, current limiting via PTC resistors, and short-circuit protection for inputs up to 30V DC, ensuring stable operation in harsh industrial environments. The module also supports optical isolation with ModuleBus to prevent signal interference, and offers input status LED indicators for quick operational status checks. It is suitable for applications in building automation, process control, and industrial monitoring systems where precise analog data collection is required.