AC800M 3BSE053240R1 PM891   Central processing unit

The AC800M 3BSE053240R1 PM891 is a high-performance, high-availability central processing unit (CPU) from ABB that belongs to the PM891 family and is one of the core components of the System 800xA distributed control system.

Designed to meet the complex control needs of industrial automation, this processor offers high performance, high availability, communication capabilities, scalability and flexibility. It is equipped with a powerful processor and sufficient memory, which can quickly process a large number of data and control tasks, ensuring the real-time and response speed of the system. At the same time, it supports the CPU redundancy design, when the primary controller fails, it can be seamlessly switched to the standby controller, ensuring the continuous operation and stability of the system.

The AC800M 3BSE053240R1 PM891 contains components such as a microprocessor, RAM memory, real-time clock, LED indicator, INIT button and secure digital interface, and provides two RJ45 Ethernet ports and one RJ45 serial port, of which the COM4 port is mainly used for configuration tool 1. In addition, it has a Communication extension Bus (CEX-BUS), which can connect multiple extension modules to improve the availability of the CEX bus.

In terms of control functions, the AC800M 3BSE053240R1 PM891 can realize advanced control such as cascade, feedforward, decoupling, adaptive and predictive control, integrating continuous control, sequence control and batch control. At the same time, it supports the open DCS (distributed control system) design, so that the computer in the system can easily communicate and transmit information through the local area network.

AC800M 3BSE053240R1 PM891 has a wide range of applications in oil and gas extraction and processing, power generation and energy management, chemical and pharmaceutical industries, water and wastewater treatment, manufacturing automation and other industries.