Woodward 8572-776 |CPU Module, Origin: United States
1.8572-776 Product Overview
The Woodward 8572-776 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. 8572-776 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 8572-776 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.
Precautions for servo drive selection
When choosing a servo drive, multiple factors need to be considered to ensure that it can meet the specific application requirements. Here are some important selection considerations:
Motor matching: The driver must match the rated voltage, current, and power of the servo motor. Mismatch may result in motor damage or driver overload.
Control mode: Choose the appropriate control mode according to application requirements, such as open-loop, closed-loop, or hybrid control.
Response speed: For applications that require quick response, choose drivers with shorter response times.
Accuracy requirements: Select the appropriate driver according to the accuracy requirements of the application to ensure that the motor can achieve the required position and speed accuracy.
Environmental conditions: Consider the environment in which the drive will operate, such as temperature, humidity, vibration, etc., and choose a drive that is suitable for these conditions.
Interface compatibility: Ensure compatibility between the driver and the control system interface, such as analog signals, digital signals, or communication protocols.
Scalability and flexibility: Consider possible future expansion needs and choose drives that can be easily integrated or upgraded.
Cost effectiveness: Choose cost-effective drivers while meeting performance requirements.
Brand and after-sales service: Choosing a well-known brand of driver usually provides better technical support and after-sales service.
Safety standards: Ensure that the drive complies with relevant safety and electromagnetic compatibility standards.
By considering the above factors comprehensively, suitable servo drives can be selected for specific applications to achieve efficient, stable, and precise control.
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