ABB PM866 3BSE076359R1
ABB PM866 3BSE076359R1
ABB PM866 3BSE076359R1
ABB PM866 3BSE076359R1
ABB PM866 3BSE076359R1

ABB PM866 3BSE076359R1 | Industrial DCS Main Processor with Redundant Operation

  • Brand: ABB
  • Model: PM866
  • Product Type: Main Processor Module
  • Series: AC800M Series (ABB Advant Controller 800M)
  • Core Function: Executes control logic, manages I/O communication, and coordinates distributed control in ABB 800xA DCS; supports redundant operation for high availability.
  • Key Specs: PowerPC 750 processor, 256MB RAM, supports Profibus/Modbus/Ethernet protocols, -40°C to +70°C operating temperature.
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Part number: ABB PM866 3BSE076359R1
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Description

PM866 3BSE076359R1: Product Overview
The PM866 3BSE076359R1 is a main processor module within ABB’s AC800M series, designed for deployment in the 800xA distributed control system (DCS) as the central processing unit for industrial automation. Its role is to serve as the brain of the control system, executing user-defined control logic, processing data from distributed I/O modules, and coordinating communication between subsystems. For continuous process industries—such as oil refining, chemical manufacturing, and power generation—it ensures deterministic control and high availability, critical for maintaining process stability and safety.
Functionally, the module runs control strategies (e.g., PID loops, sequential logic) developed in ABB’s Control Builder M engineering tool, handling up to 32,000 I/O points in redundant configurations. It processes analog (4-20mA, RTD) and digital (dry contact, 24V DC) signals from field devices, converting raw data into actionable control commands (e.g., valve positioning, motor speed adjustment). As part of the AC800M family, it inherits modular scalability, hot-swappable components, and seamless integration with 800xA’s asset management and HMI tools. This platform advantage simplifies system expansion and reduces lifecycle costs by enabling reuse of engineering assets across projects.

ABB PM866 3BSE076359R1

ABB PM866 3BSE076359R1

PM866 3BSE076359R1: Technical Specifications
  • Model Number: PM866 3BSE076359R1
  • Manufacturer: ABB
  • Product Type: Main Processor Module
  • Processor: PowerPC 750, 400 MHz
  • Memory: 256MB RAM, 1GB Flash (user program storage)
  • Redundancy: Supports dual-processor active/standby configuration (automatic failover ≤50ms)
  • Communication Protocols: Ethernet (TCP/IP, 800xA), Profibus DP/PA, Modbus RTU/TCP, IEC 61850 (optional)
  • I/O Capacity: Up to 32,000 points (distributed via S800 I/O modules)
  • Operating Temperature: -40°C to +70°C
  • Power Supply: 24V DC (nominal, 18-32V DC range), redundant inputs supported
  • Power Consumption: 10W (typical, single processor)
  • Dimensions: 245mm x 135mm x 115mm (width x height x depth, fits AC800M rack)
  • Weight: 1.0kg
  • Certifications: CE, UL, cULus, SIL 3 (IEC 61508, when integrated with safety logic)
Core Features & Customer Value​
Redundant Architecture Ensures Continuous Operation: The PM866 3BSE076359R1 supports dual-processor active/standby operation with automatic failover in ≤50ms. For engineers managing critical systems like refinery catalytic crackers, this eliminates single-point control failures, preventing unplanned shutdowns that could cost millions in lost production. Maintenance teams can replace a faulty processor without halting the process, as the standby unit maintains control.
High-Performance Processing for Standard Logic: The PowerPC 750 processor (400 MHz) and 256MB RAM enable execution of standard control strategies—including PID loops, interlocks, and data logging—sufficient for mid-scale applications. In a chemical plant’s blending unit, this allows real-time adjustment of ingredient ratios while logging batch data for quality compliance.
Seamless Integration with 800xA Ecosystem: As a native 800xA component, the module integrates with ABB’s asset management, HMI, and historian tools. Engineers configure logic via Control Builder M, monitor performance through 800xA Operator Workplace, and analyze trends in Historian—all within a unified interface. This reduces engineering time by 25% compared to integrating third-party processors.
Wide Environmental Tolerance for Harsh Installations: With an operating temperature range of -40°C to +70°C and 5-95% RH non-condensing tolerance, the module withstands outdoor enclosures (e.g., power plant substations) and indoor harsh environments (e.g., steel mill control rooms). Its rugged design minimizes failures due to temperature swings or humidity.
Scalability for System Expansion: The AC800M platform allows adding I/O modules (S800 series) or additional processors as process demands grow. For a water treatment plant upgrading its filtration capacity, engineers can expand from 5,000 to 30,000 I/O points by adding racks—no full system redesign required.

ABB PM866 3BSE076359R1

ABB PM866 3BSE076359R1

Typical Applications​
The PM866 3BSE076359R1 is deployed in mid-scale DCS environments requiring reliable control. In a petroleum refinery’s naphtha reformer, it acts as the main controller, managing 8,000 I/O points (temperature, pressure, flow) and executing ratio control logic for hydrogen recycle streams. Its redundant configuration ensures uptime during routine maintenance.
At a chemical plant’s batch reactor, the module coordinates sequential steps (e.g., charge, react, discharge) and communicates with a Siemens S7-1200 PLC via Profibus DP. The 800xA integration allows operators to correlate reactor performance with raw material quality in real time.
In a natural gas processing plant’s dehydration unit, the PM866 3BSE076359R1 manages glycol circulation pumps and absorber tower controls. Its -40°C cold-start capability supports winter startups in remote locations, while SIL 3 certification validates use in safety interlocks for pressure relief systems.

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