Woodward 9907-029 505 Turbine Control | 100% Original
1.9907-029 Product Overview
The Woodward 9907-029 belongs to the 505/505E series digital turbine controllers. It is a microprocessor-based control module designed for single-valve steam turbines,
including single extraction/admission systems or split-range actuator configurations.
The controller features a front panel Operator Control Panel (OCP) with a two-line, 24-character display and multi-function keypad, allowing easy on-site configuration and monitoring.
2. 9907-029 Technical Specifications and Parameters
| Parameter | Details |
|---|---|
| Power Supply | +24 VDC, approx. 1 A |
| I/O Outputs | Discrete Outputs: 8 Analog Outputs: 6 Actuator Outputs: 2 |
| Display / HMI | Two-line, 24-character LCD, with multi-function keypad |
| Dimensions | Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm) |
| Weight | Approx. 9.11 lbs (4.13 kg) |
| Operating Temperature | –4 to +140 °F (–20 to +60 °C) |
| Storage Temperature | –40 to +185 °F (–40 to +85 °C) |
| Humidity Standard | 95% RH at 20-55 °C for 48 hours without damage |
| Protection Class | Typically meets industrial dust and water protection standards |
| Communication Protocol | Supports Modbus, RS-232 / RS-422 serial interfaces |
3. Brand History
Woodward, Inc., founded in 1870 and headquartered in Fort Collins, Colorado, USA, is a global leader in energy control systems. The company has a long history of innovation in turbine control, engine management,
and power generation systems.
Woodward products are widely recognized for their reliability and precision in demanding industrial and power generation applications.
4. Applications in Industrial Automation
The 9907-029 plays a critical role in industrial automation and power generation environments:
- Steam Turbine Control: Manages startup, speed regulation, and extraction/admission control of steam turbines.
- Power Generation Systems: Used in power plants to regulate turbine-driven generators for stable frequency and load management.
- Compressor and Pump Drive Control: Ensures precise speed control for turbine-driven compressors and pumps.
- Process Industry Applications: Applied in chemical plants, refineries, and other industries requiring precise turbine operation.
- Safety and Protection Functions: Includes overspeed protection, critical speed avoidance, actuator travel limits, and event logging for operational safety.
3. The positioning accuracy of the transmission system is unstable
Reason for malfunction: Mechanical assembly issues with the transmission system. Improper installation of screw nuts
causes assembly stress on moving parts
Exclusion method: Reinstall the screw nut.
4. The positioning accuracy of the reference point is too high
Reason for malfunction: The installation of the proximity switch or detection body of the machine tool is incorrect, and the gap between
the proximity switch and the detection body is the critical value for detection; The measuring distance of the proximity switch selected is too
large, and both the detection object and the phase metal object are within the detection range; The electrical characteristics of proximity
switches are poor (note: the repetitive characteristics of proximity switches affect the positioning accuracy of reference points).
Exclusion method: Check the installation of proximity switches; The gap between the proximity switch of the machine tool and the detection
object (the technical indicator of the proximity switch represents the maximum detection distance, and the gap should be set to 50% of the
maximum gap); Replace the proximity switch
5. Incorrect return to reference point action
Reason for malfunction: The machine tool uses a negative logic (NPN type) proximity switch (i.e. OVDC indicates proximity switch action,
24VDC indicates proximity switch no action).
Exclusion method: Replace the positive logic proximity switch (PNP type).
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