ABB PM891 3BSE053240R1 is a high-performance processor unit for ABB AC800M DCS system, supporting redundant control, dual Ethernet ports and optical modulebus for S800 I/O connection, widely used in industrial process automation.

Product Overview

The ABB PM891 3BSE053240R1 is the central processor unit of ABB AC800M controller under System 800xA platform. It executes control logic, handles data processing and communication tasks for distributed control system. This CPU module supports redundant configuration to improve system availability, and connects S800 I/O via optical modulebus, suitable for continuous process control in heavy industrial sites.

Key Features

• High-performance industrial processor for AC800M DCS platform
• Supports CPU redundancy, hot swap available for maintenance
• Dual RJ45 Ethernet ports for control network, isolated COM port for configuration
• Built-in CEX-bus for communication module expansion
• Optical Modulebus interface to connect S800 I/O clusters
• Compliant with IEC 61131-3 programming standard
• Industrial grade design with wide operating temperature range

• LED status indicators for easy diagnosis and troubleshooting

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Technical Specifications

• Brand: ABB
• Model: PM891
• Part No: 3BSE053240R1
• System: AC800M / System 800xA
• Power supply: 24VDC
• Communication: 2 × Ethernet RJ45, Isolated COM port, CEX-bus, Optical Modulebus
• I/O connection: Up to 7 clusters of S800 I/O
• Programming standard: IEC 61131-3
• Mounting: DIN rail mount

• Certification: CE, UL, RoHS

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Compatibility & Application

Compatible with ABB AC800M series controllers, S800 I/O modules, CEX-bus communication units and System 800xA software. Widely applied in power plant, oil & gas, chemical, pulp & paper, metallurgy and other continuous industrial process control systems.