Woodward 9904-060 | Governor | Controller | Potential Converter
1.9904-060 Product Overview
The Woodward 9904-060 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. 9904-060 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 9904-060 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.
Working principle of microcontroller
Today, the shadow of microcontrollers can be seen in a large variety of products. If your microwave oven has light-emitting diodes,
LCD screens, and operation buttons, then it is equipped with a microcontroller. Nowadays,
all cars are equipped with at least one microcontroller, some up to six to seven: the engine, anti lock braking system,
and cruise control all rely on the control of the microcontroller. Almost any device equipped with a remote control is equipped with a
microcontroller: televisions, video recorders, and high-end stereo systems all belong to this category. You should have some
understanding of precision DSLR cameras,
digital cameras, mobile phones, portable cameras, telephone answering machines, laser printers, telephones with caller ID
and number storage functions, pagers, fully functional refrigerators, dishwashers, washing machines, and dryers with display screens
and operating keyboards. In general, any product or device that requires interaction with users has a built-in microcontroller.
In this article, we will explore microcontrollers to help you understand their nature and working principles. Afterwards, we will further introduce
how to personally use the microcontroller. Let me reveal in advance that we will be making a digital clock with a microcontroller! In addition,
we will also create a digital thermometer. Throughout the process, you will learn a lot about how microcontrollers can be applied to commercial products.
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