



Introduction
The ABB PM866-2 3BSE050201R1 Redundant Processor Units are developed for advanced industrial control systems where continuous availability and predictable control behavior are essential. As a high-capacity processor within the AC 800M controller family, this unit supports redundant operation to maintain uninterrupted process control during hardware faults or maintenance activities.
In practical engineering terms, the PM866-2 is often selected for complex control applications that demand higher performance while still adhering to strict availability requirements. Its design reflects a balance between computational capability, synchronization accuracy, and long-term operational stability.
Technical Specifications
| Item | Specification |
|---|---|
| Product Type | Redundant Processor Units |
| Model | PM866-2 |
| Ordering Number | 3BSE050201R1 |
| Control Platform | ABB AC 800M |
| Redundancy Principle | Active / Standby |
| Failover Behavior | Automatic, bumpless switchover |
| Data Synchronization | Continuous real-time mirroring |
| Installation | Controller housing, control cabinet |
| Dimensions | 135 × 186 × 119 mm (H x W x D) |
| Weight | 1.2 kg |
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