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Product Overview
The WOODWARD 9907-1200 is a digital turbine control associated with Woodward’s 505E control platform for steam-turbine applications. It is designed to manage turbine speed, load, and steam-valve positioning in mechanical-drive and generator applications. The controller receives turbine speed and process signals, executes configurable control logic, and drives the connected actuator or valve system to maintain the required operating condition. The 505E platform is commonly used where precise turbine governing, overspeed protection, extraction/admission control, and plant-level interfaces must be integrated into one control architecture. For maintenance teams, this model is particularly relevant as a legacy turbine-control spare where matching the installed hardware revision and configuration is essential.
Technical Specifications — 9907-1200
| Parameter | Value |
|---|---|
| Product Model | 9907-1200 |
| Manufacturer | Woodward |
| Product Type | Digital Turbine Control |
| Product Family | 505E |
| Primary Application | Steam Turbine Control |
| Control Function | Speed, load, valve and extraction/admission control |
| Turbine Type | Steam turbine |
| Speed Inputs | Magnetic pickup / speed-sensing inputs, configuration dependent |
| Actuator Interface | Analog/current actuator output, configuration dependent |
| Operator Interface | 505E front-panel interface |
| Control Logic | Microprocessor-based programmable control |
| Communication | Configuration-dependent plant/control-system interfaces |
| Mounting | Industrial control cabinet |
| Power Supply | Verify exact hardware revision and nameplate |
| Operating Temperature | Verify installed hardware revision |
| Dimensions | Configuration-dependent |
| Weight | Configuration-dependent |
| Typical Application | Turbine generator and mechanical-drive systems |
WOODWARD 9907-1200
Key Features and Benefits — 9907-1200
- Designed for steam-turbine governing applications.
- Provides electronic control of turbine speed and operating load.
- Supports integration of turbine speed sensing, valve control, and process signals.
- Front-panel operator functions simplify turbine startup, operation, and adjustment.
- Suitable for legacy turbine-control systems where replacement of the complete control architecture is impractical.
- Woodward 505-series architecture is widely associated with industrial steam-turbine applications.
Personally, I would verify the exact 9907-1200 hardware revision and application configuration before procurement. Woodward 505 controllers can differ in I/O, software, actuator interface, and turbine-control configuration even when the basic family designation looks similar.
Related Models
505E — Woodward turbine-control platform intended for steam turbines with extraction or admission control requirements.
9907-1100 — Related Woodward 505-series digital turbine-control model used in legacy turbine applications.
9905 Series — Earlier Woodward digital turbine-control family used for speed and load governing in industrial turbine installations.
505XT — Newer Woodward turbine-control platform offering expanded communication, configuration, and control capabilities for modern installations.
Installation and Maintenance — 9907-1200
Before replacement, record the existing controller configuration, software revision, turbine speed settings, actuator calibration, trip settings, and I/O assignments. Verify the speed pickups, actuator type, emergency shutdown circuit, and plant interface wiring before energizing the replacement.
During preventive maintenance, inspect terminal connections, cooling paths, power supplies, speed-sensing circuits, actuator wiring, and front-panel controls. After installation, perform controlled startup and valve-position checks, verify speed indication and governing response, and confirm all independent overspeed and shutdown functions before returning the turbine to service.
Product Warranty — 9907-1200
Warranty coverage depends on supplier condition and sales terms. Confirm whether the unit is new old stock, refurbished, repaired, or previously installed, and request serial-number traceability, functional-test records, software/configuration information, and the applicable warranty period.
The WOODWARD 9907-1200 should be treated as a configuration-specific turbine-control spare. Exact hardware, firmware, and application compatibility should be confirmed before replacing an installed controller.
