The PM820-1 3BSE010731R1 is a high-performance processor module and the core “motherboard” unit for the ABB Advant Controller 800M (AC800M) system. This module functions as the central processing unit (CPU) for the controller, executing complex control logic, managing I/O communication, and handling system-wide synchronization. Designed for scalability and reliability, the PM820-1 is widely used in distributed control systems (DCS) to manage everything from simple machine automation to large-scale industrial process loops.
Product Specifications (Datasheet)
Model Identification Model Name: PM820-1 Product ID: 3BSE010731R1 Manufacturer: ABB Series: AC 800M / Advant OCS
Technical Performance CPU Type: Motorola 68360 (or equivalent high-speed 32-bit RISC processor) Clock Frequency: 25 MHz RAM Memory: 8 MB (Standard configuration) Flash Memory: 4 MB (For firmware and application storage) Execution Speed: 0.1 ms per 1000 boolean instructions
Communication & Interfaces CEX-Bus: Support for communication expansion modules Internal Bus: ModuleBus for local I/O connection Ethernet: Integrated ports for Control Network (MMS) and Tool communication Serial Ports: 2x RS-232 (for programming or Modbus RTU)
Physical Attributes Dimensions: 186 mm x 119 mm x 45 mm Weight: 0.65 kg Mounting: DIN Rail or Baseplate mounting (TP830) Protection: IP20
Logistics Country of Origin: Sweden HS Code: 85371091 Environmental: Operating temperature +5°C to +55°C
Application Fields
The PM820-1 serves as the central intelligence in various industrial sectors:
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Process Automation: Controlling chemical reactors, distillation columns, and pharmaceutical production lines.
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Power Plants: Managing auxiliary systems, burner controls, and water treatment logic.
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Oil & Gas: Integrated into wellhead control systems and pipeline monitoring stations.
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Manufacturing: Serving as a high-speed logic controller for assembly lines and packaging machinery.
Product Instructions
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Hardware Assembly: The PM820-1 must be mounted onto a compatible baseplate (e.g., TP830). Ensure the baseplate is securely fastened to the DIN rail and that the grounding strap is connected to the cabinet frame.
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Power Supply: Connect a stabilized 24V DC power source. In redundant configurations, two PM820-1 units can be linked; ensure the redundancy cables are correctly seated in the dedicated ports.
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Battery Backup: The RAM is buffered by a lithium battery (SB821/SB822). Install a fresh battery before commissioning to ensure the application program is retained during power interruptions.
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Software Configuration: Use ABB Control Builder M (part of the 800xA system) to download the controller firmware and your specific application logic. The module IP address is typically set via the serial “service” port or ARP tool.
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Diagnostic Monitoring: Monitor the front-panel LEDs. A steady green “Run” LED indicates normal operation. A flashing red “Error” LED indicates a hardware fault or a missing configuration.
Q&A – Frequently Asked Questions
Q: Is the PM820-1 compatible with older AC 800M baseplates? A: Yes, it is compatible with the TP830 baseplate series. However, always verify that your firmware version supports the specific hardware revision of your baseplate.
Q: How do I perform a “Cold Start” on the module? A: Press and hold the “Init” button on the front panel while cycling the 24V DC power. This will clear the RAM and force the controller into a clean initialization state.
Q: Can I upgrade the RAM on the PM820-1? A: The PM820-1 has a fixed 8MB RAM. If your application exceeds this memory limit, you should consider upgrading to a PM860 or PM864 module.
Q: What is the purpose of the CEX-Bus? A: The CEX-Bus (Communication Expansion) allows you to add specialized modules for Profibus DP, Foundation Fieldbus, or additional Ethernet ports directly to the PM820-1.
Recommended Similar Models
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ABB PM860 (Advanced Processor Module)
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ABB PM851 (Compact Processor Module)
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ABB TP830 (Controller Baseplate)
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ABB CI854A (Profibus Communication Interface)
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ABB PM864A (High-Redundancy Processor)
