Description
Woodward 9907-861
Technical Specifications
- Processing Architecture: High-speed digital signal processor (DSP) for real-time control loop execution.
- I/O Configuration: Extensive discrete and analog inputs/outputs for comprehensive turbine monitoring.
- Power Supply: Regulated 24 VDC or 125 VDC with internal isolation and protection.
- Communication: High-speed serial backplane communication for integration with operator panels and remote I/O.
Functional Features
- Advanced PID Control: Multi-loop PID algorithms with auto-tuning for precise speed and pressure regulation.
- Programmable Logic: Built-in logic solver for custom start-up sequences, interlocks, and auxiliary equipment control.
- Data Logging: Non-volatile memory for recording operational trends, alarms, and trip events.
- Self-Diagnostics: Continuous internal hardware and software monitoring with immediate fault indication.
Application Scenarios
Deployed in complex steam turbine, gas turbine, and turbo-expander applications across power generation, petrochemical, and oil and gas industries.
Performance Parameters
- Control Accuracy: Steady-state speed regulation better than ±0.1% of rated speed.
- Scan Rate: Millisecond-level control loop execution for rapid transient response.
- Reliability: Engineered for continuous 24/7 operation with high MTBF.
Material Composition
Industrial-grade printed circuit boards with multi-layer conformal coating, housed in a robust, EMI-shielded metal enclosure.
Structural Characteristics
- Form Factor: Compact, plug-in modular design for standard control racks.
- Indicators: Front-panel LED status indicators for power, run, communication, and fault conditions.
- Connectors: High-density, keyed backplane connectors for secure and error-free installation.
Working Principle
The module continuously samples analog and discrete inputs from the turbine. The microprocessor executes the configured control program, comparing actual values to setpoints and calculating the necessary corrective output signals. These outputs are sent to final control elements (like CPCs or actuators) to adjust steam or fuel flow, maintaining the desired operating parameters.
Installation Requirements
- Insert firmly into the designated backplane slot, ensuring proper alignment.
- Verify the module configuration and slot assignment via the system software before powering up.
- Ensure the control panel environment meets temperature and humidity specifications.
Usage Precautions
- Always maintain an up-to-date backup of the system configuration and parameters.
- Never remove or insert the module while the system is powered on unless explicitly designed for hot-swapping.
- Perform regular functional testing of all I/O channels during scheduled maintenance.
