ABB AI921 Analog Input Module

Product Overview

The ABB AI921 is an advanced Analog Input Module that integrates seamlessly with ABB’s S900 I/O and 800xA platforms. This module converts real-world analog signals—such as 4-20mA current, voltage, thermocouples, and RTDs—into digital data that can be processed by a PLC or DCS. By providing precise data conversion, it ensures accurate process monitoring in industrial automation.

Designed for reliability, the ABB AI921 supports essential process parameters like temperature, pressure, and flow. It is crucial for efficient data acquisition and process control in a wide range of industrial applications.

Key Features

Multi-Signal Compatibility: The AI921 handles multiple signal types, including 4-20mA, voltage, thermocouples, and RTDs, providing flexibility in measurement.
High Accuracy: With ±0.1% full-scale accuracy, the module ensures precise signal conversion and reliable monitoring.
Galvanic Isolation: It offers galvanic isolation between channels and the power supply, ensuring signal integrity and system safety.
HART Communication: HART communication support allows for device configuration and diagnostics, adding convenience during setup.
Flexible Operation: The module can operate in both single-channel and redundant configurations, enhancing system reliability.
Diagnostic Capabilities: Built-in diagnostic features detect faults in the module or channels, ensuring continuous operation and minimizing downtime.
Effortless Configuration: Using ProSoft Configuration Builder, configuration is quick and easy, streamlining the integration process.

Technical Specifications

Parameter	Details
Model	ABB AI921
Manufacturer	ABB
Product Type	Analog Input Module
Number of Channels	8 channels
Signal Types	4-20mA, Voltage, Thermocouples, RTDs
Resolution	12-bit or 16-bit (depending on model)
Accuracy	±0.1% of full scale
Input Impedance	>1 MΩ
CMRR (Common Mode Rejection Ratio)	>90 dB
Isolation	Galvanic isolation between channels and power supply
Power Supply	24 VDC
Mounting	DIN rail
Dimensions	Compact size

Applications

The ABB AI921 is ideal for industrial applications requiring high-precision data acquisition, such as:

Process Control: It efficiently monitors analog signals in process control applications, including temperature, pressure, and flow.
Seamless PLC Integration: Easily integrates with ABB’s AC800M and S900 PLCs, offering superior data management.
Industrial Automation: Essential for industries like oil & gas, chemical, and food processing, where reliable signal conversion is critical.
Temperature and Pressure Monitoring: Plays a vital role in systems that monitor temperature and pressure, ensuring consistent and accurate process conditions.