Woodward 9907-167 is a 505E-series digital governor controller designed for precise speed and load control of steam turbines, turbogenerators, and turboexpanders. Built on Woodward’s proven 505 platform, it integrates advanced microprocessor technology, rugged hardware, and configurable control algorithms to ensure reliable operation in harsh industrial environments. Below is a detailed technical overview based on official documentation and verified specifications:
- Brand: Woodward
- Model: 9907-167
- Product Type: Digital governor control unit
- Series Affiliation: 505E microprocessor-based governor series
- Core Purpose: Optimize turbine performance by managing speed, load, and critical operational parameters (e.g., extraction/admission pressure control).
- Certifications: CE, UL, and CUL compliant. Class I, Div. 2 (Groups A/B/C/D, T3C) and Class I, Zone 2 (Group IIC, T3C) hazardous location ratings for use in explosive environments.
- Input Voltage: 18–32 VDC (nominal 24 VDC), with reverse polarity protection.
- Power Consumption: 1 A at 24 VDC (no load).
- Primary Interfaces:
- Modbus RTU (via RS-485/RS-422) for integration with DCS/SCADA systems.
- RS-232 for local configuration and debugging using Woodward’s 505View or OpView™ software.
- Data Transfer Rate: Configurable up to 57,600 bps.
- Optional Ethernet: Some sources indicate support for Ethernet TCP/IP (e.g., NewGenPLC), but this requires confirmation with Woodward’s official documentation.
- 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: 8 relay outputs (Form C, 24 VDC/5 A) 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.
- Expansion Slots: Supports optional I/O modules (e.g., additional analog inputs) for complex applications.
- 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 for speed/load control and 20 ms for extraction/admission control.
- Dimensions: 14” (W) × 11” (H) × 4” (D) [35.6 cm × 27.9 cm × 10.2 cm], panel-mount design with front-accessible controls.
- Mounting: DIN rail or panel-mount options available.
- Operating Temperature:
- Without NEMA 4X Enclosure: -25°C to +65°C (-13°F to +149°F).
- With NEMA 4X Enclosure: -13°C to +55°C (9°F to +131°F).
- Humidity: 5–95% RH (non-condensing).
- 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.
- Extraction/Admission Control: Manages steam flow for processes requiring precise pressure regulation.
- 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.
- Watchdog Timer: Resets the controller in case of software errors.
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 self-test routines for quick troubleshooting.
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 505E Digital Governor Installation and Operation Manual (Document No. 85018v2) includes wiring diagrams, programming guides, and troubleshooting steps.
- Software: Configurable via 505View (PC-based) or OpView™ software for remote monitoring, parameter editing, and trend analysis.
- Firmware Updates: Available through Woodward’s official technical support or local distributors.
- Part Number: 9907-167
- Availability: Typically in stock with a 2–4 week lead time for global delivery.
- Accessories: DIN rail mounting kits, RS-485 cables, surge protection modules, and NEMA 4X enclosures.
