The ABB PM865K01 3BSE031151R1 is a high – performance processor unit designed for industrial automation and control systems. It is part of ABB’s AC 800M series and is widely used in various industrial fields such as power, petroleum, chemical, metallurgy, and machinery4. It features high integrity and is certified for SIL 3, meeting the requirements of safety – critical applications1. The module has powerful processing capabilities, with a 96MHz microprocessor and 32MB of RAM, which can handle and manage a large amount of data effectively5. It also supports CPU redundancy, ensuring high availability and continuity of the system through redundant CPUs, CEX – bus, communication interfaces, and S800 I/O. In addition, with the addition of the SM81X module and SIL – certified software, it can achieve high – integrity functionality. The controller is equipped with two RJ45 Ethernet ports for connection to the control network, enabling high – speed data transmission and remote control, and two RJ45 serial ports, one of which is an RS – 232C port with modem control signals, and the other is an isolated port for connecting configuration tools.