Woodward 9907-1106 | Governor | Controller | Potential Converter
1.9907-1106 Product Overview
The Woodward 9907-1106 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.
contacts： Mike
+86 18350224834 （WeChat/WhatsApp）
Email：Mike18350224834@gmail.com
2. 9907-1106 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 9907-1106 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.
Issues and factors affecting the controller
1、 Controller failure. From the perspective of expression, there may be the following situations:
1. Damage to power devices. 2. Damage to the internal power supply of the controller. 3. The controller operates intermittently. 4.
Control signal loss caused by worn connecting wires, poor contact of connectors, or detachment of connectors.
2、 Regarding the analysis of the causes of the above failure modes:
A. There are several possible causes of damage to power devices: motor damage, poor quality or insufficient selection level of
power devices themselves, loose device installation or vibration, motor overload, damage to power device drive circuits or unreasonable parameter design.
B. There are several possible causes of damage to the internal power supply of the controller: short circuit in the internal circuit of the controller,
short circuit in the peripheral control components, and short circuit in the external leads.
C. There are several possible reasons for the intermittent operation of the controller: parameter drift of the device itself in high or low temperature
environments, high overall power consumption in the controller design, causing local high temperatures in some devices and putting the device itself into a protective state, resulting in poor contact.
D. There are generally several possible causes of wire wear and poor contact or detachment of contact plugs: unreasonable wire selection,
incomplete protection of wires, poor selection of connectors, and weak crimping between wire harnesses and connectors.
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