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Description
The ABB PM802F 3BDH000002R1 is a high-performance base unit (CPU module) serving as the core of the AC800F series within ABB’s Freelance Distributed Control System (DCS). Designed for medium-scale process automation in industries like chemical, power, and water treatment, this module features a 32-bit RISC processor with support for full system-level redundancy. It delivers deterministic control, supports a wide range of fieldbus protocols (PROFIBUS, Modbus, FF HSE), and can manage up to 1000 I/O points, making it a versatile and reliable “brain” for complex control strategies.
Application Scenarios
A municipal water treatment plant was struggling with an obsolete PLC system that lacked redundancy and remote diagnostics, leading to frequent unplanned shutdowns during peak demand. The plant migrated to an ABB Freelance DCS centered on the PM802F base unit. The module’s dual-redundant configuration ensured that a pump station continued operating seamlessly during a primary CPU fault, preventing a service interruption for 50,000 residents. The integrated Ethernet and fieldbus connectivity allowed engineers to monitor chemical dosing and filter backwash cycles remotely, reducing on-site troubleshooting time by 40%.
Parameter
| Main Parameter | Value / Description |
|---|---|
| Product Model | ABB PM802F (3BDH000002R1) |
| Manufacturer | ABB |
| Product Category | DCS Controller Base Unit (AC800F Series) |
| CPU Architecture | 32-bit Super Scalar RISC Processor (e.g., PowerPC 604e) |
| Processing Speed | Up to 150 MIPS |
| Memory | 4 MB RAM (battery-backed), 4 MB Flash EPROM |
| I/O Capacity | Supports up to 1000 I/O points (with expansion) |
| Communication Ports | RS-232/RS-485, Ethernet (via onboard or expansion) |
| Supported Protocols | PROFIBUS-DP, Modbus RTU/TCP, Foundation Fieldbus HSE, IEC 60870-5-101/104 |
| Redundancy Support | Yes (Hot Standby) – Full controller and power supply redundancy |
| Safety Integrity | SIL 3 Capable (depending on system configuration) |
| Supply Voltage | 24 V DC (typical logic supply) / System-dependent (e.g., 220V AC) |
| Power Consumption | Approx. 4 W (module only) |
| Operating Temperature | -20 °C to +60 °C (industrial grade) |
| Mounting | Rack-mounted (AC800F base plate or system rack) |
| Dimensions (LxHxW) | ~203 mm x 178 mm x 254 mm (varies by source) |
| Weight | ~0.8 – 2.0 kg |
