ABB PM891K01 Processor Unit 3BSE053241R1

ABB PM891K01 (3BSE053241R1) is a high-performance CPU controller for ABB AC 800M and System 800xA DCS platforms. As the core processing unit, 

it executes control logic, performs real-time computation and manages system communication. This module is widely deployed for high-reliability process control in power, 

oil & gas, chemical and other heavy industrial facilities, and serves as a key replacement spare part for system maintenance.

3. Technical Specifications

• Part Number: PM891K01 / 3BSE053241R1
• Compatible System: ABB AC 800M, System 800xA
• Processor: 450 MHz multi-core
• Memory: 256 MB RAM, 1 GB Flash
• Communication Ports: 2 redundant Ethernet ports, 1 configuration serial port
• Expansion Bus: CEX-Bus
• I/O Interface: Optical Modulebus, supports up to 7 groups of S800 I/O
• Power Supply: 24 VDC (19.2–30 VDC)
• Operating Temperature: -20°C ~ +60°C
• Dimensions: 174 × 186 × 94 mm
• Net Weight: Approx. 1.2 kg
• Certification: CE, UL, RoHS

4. Key Features

1. Powerful computing capability to run complex control algorithms and manage large-scale I/O points efficiently.
2. Supports CPU and network redundancy with bumpless switchover to ensure uninterrupted operation.
3. Large memory capacity for storing extensive control programs and historical data.
4. Multiple communication interfaces compatible with mainstream industrial protocols.
5. Compact and robust industrial design with IP20 protection for long-term stable operation in harsh sites.