ABB PM891K01 3BSE053241R1 Processor Unit AC 800M.The PM891 processor is a monolithic unit equipped with power supply, CPU-boards and unit termination. The unit contains microprocessor and RAM memory, a real-time clock, LED indicators, INIT push button and a Secure Digital interface. The PM891 does not contain any internal battery The PM891 has two RJ45 Ethernet ports (CN1, CN2) for connection to the Control Network, and one RJ45 serial port (COM4). The COM4 port is isolated and used for a configuration tool. The PM891 supports CPU redundancy for higher availability (CPU, CEX-Bus, communication interfaces and S800 I/O).
The PM891K01 (3BSE053241R1) is a controller for the AC 800M series designed for industrial automation and control applications. It has a single processor unit including power supply, CPU board and unit terminals. Key specifications and features include:
Processor type: MPC8270
Clock frequency: 450 MHz
Memory: 256 MB, of which 208.985 MB are available for application use
Flash memory: Yes, for storage purposes
Redundancy: Not provided by the controller itself, but the system can be configured with redundant communication interfaces for higher availability
Ethernet interface: 10/100 Mbit/s with 2 Ethernet channels
Control network protocols: MMS (Manufacturing Message Service) and IAC (Inter-Application Communication) supported
Power supply: 24 V DC (19.2-30 V DC), power consumption 660/750 mA at +24 V
Environment and approvals: Designed for industrial environments with specific temperature, contamination levels and vibration tolerance. It also complies with protection class IP 20 according to EN 60529, IEC 529 and has CE marking approval.
Communication Expansion Bus (CEX-Bus): The CEX-Bus is used to expand the on-board communication ports via communication interface units and supports the use of redundant communication interfaces on the CEX-Bus.
Modulebus: The optical Modulebus can be used to connect seven clusters of S800 I/O units, each containing up to 12 units.
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