Description
Woodward 8237-1600
Technical Specifications
- Part Number: 8237-1600
- Processor: Triple redundant microprocessors
- Voting: 2oo3 architecture
- Safety Rating: SIL 3
Functional Features
- Fault Tolerance: Continues safe operation with one failed processor.
- Continuous Comparison: Compares all three processor outputs every scan cycle.
- Self-Diagnostics: Detects and isolates faulty channels automatically.
Application Scenarios
The brain of any ProTech-SX installation, processing all safety inputs and generating validated trip outputs.
Performance Parameters
- Scan Time: <5 ms for full voting cycle.
- Diagnostic Coverage: >99%.
Material Composition
Triple-redundant processor boards with high-reliability memory and voting logic ASICs.
Structural Characteristics
- Backplane Interface: High-speed parallel bus for inter-processor communication.
- Status Indicators: Individual processor health and overall system status.
Working Principle
Three identical processors independently execute the same safety logic. A dedicated voter compares outputs and generates trip commands only when at least two processors agree, rejecting spurious signals from a single failed channel.
Installation Requirements
- Backplane: Must be installed in designated ProTech-SX rack slot.
- Firmware: Ensure all processors run identical firmware versions.
Usage Precautions
- Never Mix: Do not mix different firmware versions in the same voting group.
- Replacement: Follow hot-swap procedures to maintain system availability.
