Woodward 9907-838 | Governor | Controller | Potential Converter
1.9907-838 Product Overview
The Woodward 9907-838 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. 9907-838 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 9907-838 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.
Classification of Fire Linkage Controllers – Functions and Performance of Fire Linkage Controllers
The fire linkage controller is the core component of the fire linkage control equipment. It receives fire alarm information from
the fire alarm controller and implements linkage control and status monitoring of automatic fire-fighting equipment according to
preset logic. The fire linkage controller can directly send control signals and control the controlled
equipment on site through the driving device. For situations where the control logic is complex and it is inconvenient to achieve
direct control on the fire linkage controller, the controlled equipment can be indirectly controlled through fire electrical control devices
(such as fire shutter controllers, gas fire extinguishing controllers, etc.).
1、 Classification
Fire linkage controllers can be classified according to their structural form, usage environment, and explosion-proof performance.
According to the structural form, it can be divided into cabinet fire linkage controllers, desktop fire linkage controllers,
and wall mounted fire linkage controllers (see Figure 2-2)
According to the usage environment, it can be divided into land-based fire linkage controllers and marine fire linkage controllers.
According to explosion-proof performance, it can be divided into explosion-proof fire linkage controllers and non explosion-proof fire linkage controllers
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