PM891K01 3BSE053241R1  Redundant central processing unit

The PM891K01 3BSE053241R1 is a high-performance redundant central processing unit (CPU) designed for ABB's System 800xA distributed control system.

Key features of this processor include:

High performance: The PM891K01 is equipped with a powerful multi-core processor and lots of RAM, allowing it to handle multiple tasks at the same time and process large amounts of data quickly.

Redundant design: The processor has built-in redundancy, meaning it also ensures high system availability and reliability in the event of hardware failure. Typically, two PM891 controllers can work together as a pair of redundant controllers, with one acting as the primary controller and the other as the standby controller.

Communication capabilities: The PM891K01 supports multiple communication protocols such as Ethernet, Profibus, and Modbus, which allows it to communicate with various I/O modules and other device interfaces. In addition, it also has a redundant Ethernet communication function, providing two redundant Ethernet ports to support a variety of Ethernet protocols, such as TCP/IP, UDP/IP, etc., to ensure the reliability and stability of communication.

Easy integration and debugging: The controller provides a friendly user interface and programming interface to facilitate users to integrate, debug and control various automation equipment.

Wide range of applications: Suitable for a variety of industrial automation and control applications requiring high reliability and high performance communication, such as power, chemical, pharmaceutical, metallurgy, etc.

The PM891K01 3BSE053241R1 is not only a monolithic unit with a power supply, CPU board and unit terminal, but also contains components such as a microprocessor and RAM memory, real-time clock, LED indicator, INIT button and secure digital interface. In addition, it includes a Communication Expansion Bus (CEX-BUS) for expanding the onboard communication port through the communication interface unit and using redundant communication interfaces on the CEX bus.