Woodward A9904-060 from SAUL ELECTRIC | In Stock
1.A9904-060 Product Overview
The Woodward A9904-060 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.
contacts： Mike
+86 18350224834 （WeChat/WhatsApp）
Email：Mike18350224834@gmail.com
2. A9904-060 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 A9904-060 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.
There are three types of buses inside a microcontroller: data bus, address bus, and control bus. Communication on
each bus is carried out in coordination with another bus.
The data bus is a signal line used for exchanging data between the CPU, memory, and I/O, and processing data stored
in designated locations. The exchanged data includes numerical values used for calculation, calculation results, input
signals from external devices, and signals output to external devices.
The address bus is a signal line used to specify the location of memory and I/O. When exchanging data on the CPU, it is
necessary to specify the destination of data transmission or storage. Therefore, the address bus is used to specify this location.
The control bus is a signal line used to specify the location of the read or write address bus. When the control bus issues a
write instruction, the designated memory and I/O on the address bus receive the data sent on the data bus. When the control
bus issues a “read” command, data is output to the data bus.
Nowadays, the application of microcontrollers is almost ubiquitous. After decades of development, it not only has powerful
functions, but also has a very diverse range of types. Have you gained a deeper understanding of microcontrollers through today”s
introduction? In the upcoming Zhishi class, we will also share more knowledge related to microcontrollers with everyone. Stay tuned.
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