The AI625 is an analog input module from ABB with a wide range of functions and applications:
Technical Specifications: The AI625 module has 16 channels and 12-bit resolution, and is capable of handling input signals from 4 to 20 milliamps (mA)
Communication interface: The module adopts RS-485 bus as the data communication line, supports the MODBUS RTU protocol, and can directly access the configuration software that supports the protocol
Application: AI625 module is widely used in industrial automation and control systems, process control in chemical, oil, gas and other industries, equipment condition monitoring of power systems, and parameter monitoring in the field of water treatment and sewage treatment
Features: High resolution, high reliability, high stability, and possibly a diagnostic function to monitor communication status in real time, providing maintenance and troubleshooting convenience
Size and weight: The size and weight of the module may vary depending on the specific model, with some sources mentioning a size of 250mm×10mm×50mm and a weight of about 1.225kg
Installation and use: The AI625 module is designed for use in industrial environments, is easy to install and use, and is usually mounted on standard DIN rails

The diagnostic function of the ABB AI625 module mainly provides the ability to monitor the status of the communication in real time, which is very helpful during maintenance and troubleshooting. Specifically, the module is able to monitor the status of its communications in real time, allowing problems to be detected and troubleshooting in a timely manner, which increases the reliability of the system and reduces potential downtime
Through this diagnostic function, users can more easily monitor the running status of the module, quickly locate the problem, and then take appropriate maintenance measures to ensure the stable operation of the industrial automation system.