Integrated power supply, CPU board, and unit terminal. Internally equipped with microprocessor, RAM memory, real-time clock, LED indicator lights, Initiat button, and secure digital interface, without internal battery. Equipped with two RJ45 Ethernet ports (CN1, CN2) for connecting to the control network; There is also an isolated RJ45 serial port (COM4) that can be used to connect configuration tools.
Equipped with a Communication Expansion Bus (CEX Bus), the onboard communication port can be expanded through the communication interface unit, and redundant communication interfaces can be used on the CEX bus. Its optical Modulus can connect seven S800 I/O unit clusters, with each cluster containing up to 12 units. Each PM891 has a unique Ethernet address used as a hardware identifier for the device.
Description
ABB PM891K01 3BSE053241R1 high-performance redundant central processing unit is an important component of ABB’s System 800xA distributed control system.
Hardware composition: It is a single-chip unit equipped with a power supply, CPU board, and unit terminals. Contains microprocessor and RAM memory, real-time clock, LED indicator lights, Initiat button, and secure digital interface, without internal battery.
Port settings: It has two RJ45 Ethernet ports (CN1, CN2) for connecting to the control network and one RJ45 serial port (COM4). The COM4 port is isolated and used for configuring tools.
Performance parameters: The clock frequency is 450MHz, it takes 0.043 milliseconds to process 1000 Boolean operations, the memory is 256MB, and the RAM available for application programs is 208.985MB.
Functional features:
High performance processing: Equipped with powerful multi-core processors and a large amount of RAM, it can simultaneously process multiple tasks, quickly process large amounts of data, and meet the needs of complex control and automation applications in industries such as oil and gas, power generation, and chemical processing.
Redundancy design: With built-in redundancy function, two PM891 controllers can work as a pair of redundant controllers, one as the main controller and the other as the backup controller, ensuring high availability and reliability of the system.
Strong communication capability: Supports multiple communication protocols such as Ethernet, Profibus, and Modbus, and can communicate with various I/O modules and other device interfaces, enhancing integration capabilities with other systems and devices.
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