Product Overview

The ABB PM861AK01, identified by part number 3BSE018157R1, is a high-availability central processing unit kit designed for the AC 800M controller platform within System 800xA and Advant OCS environments. This processor serves as the primary intelligence for distributed control systems, executing complex logic and coordinating multi-node communication. It is engineered with a powerful microprocessor, high-density RAM, and a high-precision real-time clock to ensure deterministic execution of automation tasks.

As a core component of the 800xA ecosystem, the PM861AK01 supports full CPU redundancy. This architecture allows for the synchronization of a backup processor via the RCU-link, ensuring that process control remains uninterrupted in the event of a hardware failure. The unit is optimized for the 800xA Control Builder engineering environment, facilitating advanced process control, batch management, and seamless integration with S800 I/O and CEX-Bus communication interfaces.

Communication and Hardware Connectivity

The PM861AK01 features a versatile array of communication ports to bridge field devices with supervisory networks. It includes dual built-in RJ45 Ethernet ports (CN1 and CN2) for network redundancy and control network connectivity. For serial communications, the module provides two dedicated ports: COM3 for RS232C connections with full modem control, and COM4, an isolated port primarily utilized for system configuration tools.

Maintenance and expansion are simplified through a CompactFlash interface, which supports data storage and firmware loading. The physical design utilizes an innovative "slide and lock" mechanism for rapid mounting on standard DIN rails. Each processor is assigned a unique hardware identity based on its embedded Ethernet MAC address, ensuring secure and conflict-free network identification within complex DCS infrastructures.

Technical Specifications

• Model Number: PM861AK01

• Order Number: 3BSE018157R1

• Module Type: Processor Unit Kit (Central Unit)

• Processor Family: AC 800M

• Redundancy Support: Full CPU Redundancy via RCU-link

• Memory: High-speed RAM and CompactFlash support

• Ethernet Ports: 2x RJ45 (10/100 Mbps)

• Serial Ports: 2x Ports (RS232C and Isolated Config)

• Protection Class: IP20

• Mounting Type: DIN Rail (Slide & Lock)

• Environmental Limits: Full EMC Certification for Industrial Use

• Physical Weight: 0.98 kg

• Unit Dimensions: 19 x 12 x 13.2 cm

• Origin: Sweden

Core Automation Applications

• Redundant Control Systems: Critical process applications where system uptime is mandatory, such as chemical reactors or boiler control.

• Large Scale DCS: Coordinating data flow across multiple S800 I/O clusters and PROFIBUS DP networks.

• Energy Management: High-speed logic execution for power generation and distribution monitoring.

• Complex Process Automation: Utilizing the 800xA Control Builder for sophisticated batch processing and plant-wide integration.