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Application Scenarios
In a large-scale thermal power plant, the ABB PM864A acts as the master controller for the Boiler Control System (BCS). It executes complex PID loops for drum level, steam temperature, and combustion management. The hot standby redundancy ensures that if the primary CPU fails due to a hardware fault, the secondary CPU takes over control within milliseconds, preventing a boiler trip and potential grid instability. Its ability to handle large I/O counts (thousands of points) and communicate with diverse fieldbus systems makes it ideal for such critical infrastructure.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | PM864A |
| Common Order Code | 3BSE018162R1 |
| Manufacturer | ABB |
| Product Category | CPU Board / Process Controller (AC 800M Series) |
| Processor | 32-bit RISC (PowerPC architecture, ~96-266 MHz) |
| Memory | 32 MB total (typically 16-32 MB RAM with battery backup, 4-8 MB Flash) |
| Performance | < 1 ms (for 1000 Boolean instructions) |
| Communication Ports | 2x Ethernet (10/100 Mbit/s, CN1/CN2), Serial port (RS-232, COM3) |
| Redundancy | Supported (1:1 Hot Standby with second PM864A + TK851 sync cable) |
| I/O Capacity | Supports up to ~8,000 I/O points via S800 I/O and fieldbus |
| Safety Level | Up to SIL 2 (depending on system architecture) |
| Supply Voltage | 24 V DC (via AC 800M baseplate) |
| Power Consumption | Typical 5-15 W |
| Operating Temperature | 0°C to +60°C (standard) |
| Mounting | Plugs into AC 800M baseplate (e.g., TP830) in a 19″ rack |
| Software | Control Builder M (for System 800xA) |
| Certifications | CE, UL, cUL, IEC 61000-6-2/4 |
