Woodward 8280-423 from SAUL ELECTRIC | In Stock
1.8280-423 Product Overview
The Woodward 8280-423 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. 8280-423 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 8280-423 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.
3. Segmented driver
The segmented drive method has several advantages, including minimal low-speed vibration and high precision level.
In the application of stepper motors that sometimes require low-speed operation (i.e. the motor drive shaft sometimes
operates below 60rpm) or precision levels below 0.90 degrees, segmented air valve drivers are widely used. The basic
concept is to perform high-precision current manipulation on the two electromagnetic coils of the motor in sine and cosine shaped steps, thereby
dividing the spacing of a transverse angle into several subdivision steps. For example, the sixteen subdivision driver
method can achieve a precision of 3200 steps per revolution (i.e. 0.1125 °) for a stepper motor with 200 standard steps per revolution.
Overall, in the case of full step operation, for every pulse input, the angular velocity of the motor shaft is one step angle. In the case
of thunderstorm operation, for every pulse input, the angular velocity of the motor shaft is one and a half step angle. It is best not to
use stepper motors in full step situations, as there is significant vibration during full step situations.
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