Woodward 9904-061 |CPU Module, Origin: United States
1.9904-061 Product Overview
The Woodward 9904-061 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.
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2. 9904-061 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 9904-061 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.
Step 9: Investigate compilers and tools
The selection of the development kit basically confirms the selection of the microcontroller. The final consideration is to check the
available compilers and tools. Most microcontrollers offer a variety of compiler, sample code, and debugging tool options.
It is essential to have all necessary tools prepared for this component. Without the right tools, the development process may
become tedious and costly.
Step 10: Start the experiment
Even if a microcontroller is selected, it does not mean it remains unchanged. Usually, it takes a long time to obtain the first prototype
hardware after receiving the development kit. At this point, a test circuit can be constructed and interface with the microcontroller.
Select high-risk components and have them work on the development kit.
You may find that previously thought excellent components have some unforeseen issues and have to choose other microcontrollers.
In any case, early experimentation will ensure that you make the right choices, and any necessary changes will have minimal impact!
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