ABB PM864AK01 3BSE01816R1 High-Availability Controller Unit
Overview
The ABB PM864AK01 (3BSE01816R1) is a high-availability processor module from the AC 800M controller family, designed for mission-critical industrial automation systems. It functions as the central processing unit (CPU) in distributed control systems (DCS), delivering real-time control, data processing, and system coordination.
Engineered with redundancy and fault tolerance, this controller is ideal for industries where continuous operation and system uptime are essential.
Key Features
Redundant Architecture: Dual CPU design with automatic failover ensures uninterrupted operation
High-Speed Processing: Capable of executing complex control logic with fast cycle times (~5 ms)
Hot-Swappable Components: Maintenance can be performed without system shutdown
Multi-Protocol Communication: Supports PROFIBUS, Modbus TCP/IP, OPC UA, and Ethernet
Scalable System Integration: Easily expands with I/O modules and communication interfaces
Industrial Reliability: Designed for harsh environments with wide temperature tolerance
Technical Specifications
| Parameter |
Description |
| Model |
PM864AK01 |
| Order Number |
3BSE01816R1 |
| Product Type |
High-Availability Controller (CPU Module) |
| Series |
ABB AC 800M |
| Processor |
Dual-core PowerPC (~1.5 GHz, redundant) |
| Memory |
1 GB RAM, 2 GB Flash |
| Communication Ports |
Ethernet, RS-485, USB |
| Protocols |
PROFIBUS DP, Modbus TCP/IP, OPC UA |
| Input Voltage |
24 VDC ±20% |
| Power Consumption |
~20 W |
| Scan Cycle Time |
Minimum 5 ms |
| Operating Temperature |
-25°C to +70°C |
| Mounting |
Control rack / DIN rail |
Structure & Internal Design
The PM864AK01 is built with a modular and redundant architecture to ensure high availability:
Dual Processor Units: Operate in parallel for redundancy and seamless failover
Memory Subsystem: Stores control programs, runtime data, and system logs
Communication Interfaces: Enable integration with field devices and supervisory systems
Redundancy Interface (CEX Bus): Synchronizes dual controllers in redundant setups
Diagnostic Indicators: Provide real-time status monitoring and fault detection
This design supports continuous operation even in the event of hardware failure.
Functional Description
The PM864AK01 acts as the brain of the control system. It continuously processes input data from field devices, executes control algorithms, and sends output commands to actuators.
With deterministic execution and fast processing, it ensures accurate control of industrial processes such as temperature, pressure, flow, and machine operations.
Application Areas
This controller is widely used in industries requiring high reliability and precision:
Power generation and energy systems
Oil & gas production and refining
Chemical and petrochemical plants
Water and wastewater treatment
Manufacturing and process automation
Its redundancy and high performance make it especially suitable for safety-critical and continuous-process environments.
Installation & Commissioning
For optimal performance:
Install within ABB AC 800M-compatible racks or cabinets
Ensure proper grounding and shielding of communication lines
Configure redundancy settings if dual-controller operation is required
Verify firmware compatibility before startup
Use ABB engineering tools (e.g., 800xA / Control Builder) for configuration
Maintenance & Lifecycle
Recommended maintenance practices include:
Monitor system diagnostics and controller status indicators
Perform periodic firmware updates
Inspect communication connections and power supply stability
Keep modules clean and protected from dust and moisture
Replace only with certified ABB components
ABB typically provides long lifecycle support, including firmware updates and spare parts availability.
Additional Advantages
The PM864AK01 stands out due to its combination of redundancy, processing power, and communication flexibility. Its ability to maintain continuous operation during failures makes it a cornerstone component in modern distributed control systems.
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