ABB PM861AK01 Core Processor Unit
ABB PM861AK01
The PM861AK01 is the core processor unit of the ABB AC 800M (also known as 800xA) control system series. It undertakes critical tasks including control logic execution, data acquisition, and communication management. Featuring a modular design, it can be flexibly mounted in 19-inch racks or on DIN rails, making it ideal for medium-to-large industrial automation projects.
Key Technical Specifications
| Parameter | Details |
|---|---|
| Processor | PowerPC 604e |
| Memory | 256 MB–4 GB RAM (varies by configuration) |
| Storage | 1 GB–2 GB Flash (SSD optional) |
| Operating System | VxWorks / Windows 10 IoT Enterprise |
| Communication Interfaces | Multi-protocol support including Ethernet (2+ ports), PROFIBUS DP, CAN, RS‑232/RS‑485, Modbus TCP/RTU, OPC UA |
| Power Supply | 24 V DC, low power consumption, suitable for cabinet-internal power supply |
| Operating Temperature | -20 °C to +60 °C; Protection Class IP20 (in-cabinet) or IP65 (special protection version) |
| Dimensions/Weight | Approx. 200 mm × 120 mm × 45 mm; Weight 1.2 kg–2.3 kg; Compliant with 3U 19-inch rack standards |
Product Features
- High-performance Computing
Equipped with an industrial-grade multi-core processor, it can execute complex control algorithms within sub-millisecond cycles.
- Modularity & Scalability
It can be freely combined with other ABB I/O, communication, and drive modules, enabling flexible system layouts.
- Redundancy & Reliability
Supports Hot-Standby redundancy, delivering over 99.99% system availability.
- Rich Communication Capabilities
Multiple Ethernet ports and compatibility with various fieldbuses facilitate seamless integration with upper-level systems, MES, SCADA, and third-party devices.
- IEC 61131‑3 Compliance
Natively supports programming languages such as ladder diagram, function block diagram, and structured text. Advanced control can also be implemented via C/C++ extensions.
- Diagnostics & Maintenance
Built-in self-diagnostic functions provide real-time reporting of hardware status, temperature, and memory usage, enabling remote monitoring and preventive maintenance.
Structure & Components
- CPU Processor Board: The core computing unit, mounted in racks or on rails.
- Communication Daughter Board (Optional): Provides interfaces for Ethernet, PROFIBUS, CAN, etc.
- Power Module: 24 V DC input with internal regulated power supply.
- Heat Dissipation Device: Fan or passive heat sink to ensure reliable operation in high-temperature environments.
- Connection Terminals: RJ45, M12, DIN terminals, etc., for on-site wiring.
Typical Application Fields
- Process Industry: Process control and monitoring in oil, chemical, natural gas, and power plants.
- Water Treatment: Automated control of water supply and wastewater treatment plants.
- Mechanical Manufacturing: Motion control and safety monitoring of large production lines and robotic systems.
- Energy Management: Real-time dispatching in distribution automation, microgrids, and renewable energy power stations.
- Packaging & Logistics: Synchronized control of high-speed packaging machines and conveyor systems.
Installation & Maintenance Guidelines
- Installation Location
It is recommended to install the unit in a control cabinet compliant with IEC 60204‑1 standards. Ensure good ventilation and avoid direct sunlight or high-temperature heat sources.
- Wiring Standards
Follow the wiring diagrams provided by ABB. Use a 24 V DC rated power supply and ensure proper grounding of the shielded cables for all communication ports.
- Firmware Upgrade
Update firmware via the ABB 800xA engineering platform or USB port. It is advisable to perform updates during system downtime windows.
- Redundancy Configuration
For high availability, adopt dual-CPU redundancy mode. The active/standby units synchronize status via a dedicated redundant link.
- Regular Inspection
Inspect heat dissipation devices, terminal tightness, and internal diagnostic logs every 6 months. Replace aging components promptly.
- Spare Parts Management
Keep CPU motherboards, communication daughter boards, and power modules in stock to minimize downtime in case of failures.
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