Woodward 9907-164 is a 505-series digital governor controller designed for precise speed and load control of steam turbines, turbogenerators, and turboexpanders. It integrates advanced microprocessor technology with a user-friendly interface to ensure reliable operation in industrial environments. Below is a detailed technical overview:
- Brand: Woodward
- Model: 9907-164
- Product Type: Digital governor control unit
- Series Affiliation: 505/505E microprocessor-based governor series
- Core Purpose: Optimize turbine performance by managing speed, load, and critical operational parameters.
- Input Voltage: 24V DC (nominal), with an operating range of 18–32V DC.
- Power Consumption: 1A at 24V DC (no load).
- Primary Interfaces: RS-232/RS-422 with Modbus RTU protocol for integration with DCS/SCADA systems.
- Data Transfer Rate: Configurable up to 115.2 kbps.
- Digital Inputs: 16 isolated dry-contact inputs (4 dedicated, 12 programmable) for status monitoring (e.g., valve position, system alarms).
- Analog Inputs: 6 programmable 4–20 mA inputs (12-bit resolution) for measuring variables like pressure, temperature, or flow.
- Digital Outputs: 4 relay outputs (Form C, 24V DC/5A) for controlling actuators, alarms, or contactors.
- Analog Outputs: 2 isolated 4–20 mA outputs (12-bit resolution) for sending control signals to electro-hydraulic converters.
- Memory: 128 MB DDR RAM for program execution and 64 MB flash memory for configuration storage.
- Processing: Real-time control algorithms with a 10 ms update rate.
- Dimensions: 14” (W) × 11” (H) × 4” (D) [35.6 cm × 27.9 cm × 10.2 cm].
- Mounting: Panel-mount design with front-accessible controls.
- Operating Temperature: -40°C to +70°C (-40°F to +158°F).
- Humidity: 5–95% RH (non-condensing).
- Protection Class: IP56 (front panel) for dust and water resistance.
- EMC Compliance: Meets IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions).
Multi-Mode Control:
- Speed Control: Maintains turbine speed within ±0.1% of setpoint.
- Load Control: Regulates power output via analog or digital inputs.
- Cascade Control: Integrates with upstream/downstream systems for coordinated operation.
Safety & Reliability:
- Critical Speed Avoidance: Three programmable speed bands to prevent resonant vibrations.
- Valve Limiters: Protects turbines from over-torque or excessive steam flow.
- Auto Start Sequence: Automates warm-up, acceleration, and synchronization processes.
- First-Out Indication: Logs the primary cause of shutdowns for quick diagnostics.
User Interface:
- 24-Character LCD Display: Shows real-time parameters (speed, load, alarms) and configuration menus.
- 30-Key Keypad: Enables on-site programming, parameter adjustment, and diagnostics.
Diagnostics:
- Status LEDs for power, communication, and I/O faults.
- Built-in watchdog timer to reset the controller in case of software errors.
Redundancy: Optional dual power supply inputs for mission-critical applications.
- Power Generation: Controls steam turbines in thermal power plants and combined-cycle systems.
- Oil & Gas: Manages turbogenerators and compressors in refineries and offshore platforms.
- Industrial Processes: Optimizes steam turbines in pulp/paper, chemical, and water treatment facilities.
- Marine Systems: Regulates propulsion turbines on ships and offshore vessels.
- Technical Manual: Woodward 505 Digital Governor Installation and Operation Manual (Document No. 9907-164) includes wiring diagrams, programming guides, and troubleshooting steps.
- Software: Configurable via 505View or OpView™ software for PC-based parameter editing and remote monitoring.
- Firmware Updates: Available through Woodward’s official technical support or local distributors.
- Part Number: 9907-164
- Availability: Typically in stock with a 2–4 week lead time for global delivery.
- Accessories: DIN rail mounting kits, RS-485 cables, and surge protection modules.
