WOODWARD 8200-556

الوصف

The WOODWARD 8200-556 is a Digital Valve Positioner (DVP). This advanced electronic device is a fundamental component in industrial turbine and process control systems, providing extremely precise and dynamic control over the position of electric valves and actuators.

WOODWARD 8200-556: Digital Valve Positioner (DVP)

The WOODWARD 8200-556 DVP serves as an intelligent interface that translates command signals from a main control system (like a turbine controller) into exact physical movements of the connected valves or actuators. This ensures highly dynamic and accurate control over critical parameters such as fuel flow, steam flow, or other process variables, optimizing system performance, efficiency, and safety.

Product Overview

This particular part number represents a specific and robust configuration within Woodward’s DVP series, designed for demanding industrial environments with a focus on safety and traditional connectivity.

• Product Type: Digital Valve Positioner (DVP) / Electric Actuator Driver
• Manufacturer: Woodward
• Part Number: 8200-556
• Key Specifications:
  • Input Power: 125 VDC. This is a significant characteristic, making it suitable for industrial control systems that use a 125 VDC power supply.
  • Ingress Protection (IP) Rating: IP30. This means it’s protected against solid objects larger than 2.5 mm, but it has no protection against water. Therefore, it’s designed for installation inside a control cabinet or a well-protected enclosure.
  • Input/Output Connections: Features Terminal Block (TB) Input/Output. All electrical connections for control signals, power, and feedback are made via screw terminals.
  • Communication: This specific variant (8200-556) is listed with no Ethernet. Its primary control signal interface will typically be analog (e.g., 4–20 mA, 0–5 VDC), PWM, or CANopen, depending on the specific configuration.
  • Safety Integrity Level (SIL) Certification: This is a defining characteristic. The 8200-556 is SIL-certified, indicating it is designed and validated for use in Safety Instrumented Functions (SIF) where a specific level of risk reduction is required. This often implies redundant components, extensive self-diagnostics, and robust fault tolerance to ensure high reliability in safety-critical applications.
  • Motor Types: Compatible with Woodward’s Limited Angle Torque (LAT) and Brushless DC (BLDC) motor types, which are integral to their high-performance valves and actuators.
  • Position Feedback: Relies on resolver feedback from the valve or actuator for highly accurate and continuous position monitoring.
• Function: The 8200-556 DVP receives a demand signal from a turbine or plant control system. It then processes this signal in real-time, integrating it with high-resolution position feedback from the actuator, to precisely drive the valve to the commanded position. Its powerful internal controller utilizes advanced algorithms (such as PID and adaptive OptiTune) to ensure rapid, accurate, and stable valve control. This is essential for maintaining turbine stability, efficiency, and safety, especially in applications where precise, fast-acting, and safety-critical valve control is required.

Detailed Product Description

The Woodward 8200-556 Digital Valve Positioner (SIL-Certified) is a robust and exceptionally capable driver, engineered for demanding and safety-critical control applications.

• SIL-Certified for Safety Applications: The SIL certification is a crucial aspect of this DVP. It signifies that the device has been rigorously designed, tested, and validated to meet specific safety integrity requirements. This makes it suitable for deployment as part of a safety instrumented system (SIS) to reduce the risk of hazardous events, providing an additional layer of protection in critical operations.
• High-Speed, Accurate Control: The DVP leverages advanced control algorithms and high-speed processing to accurately and rapidly position valves and actuators. This dynamic response is critical for maintaining stability during rapid load changes and precise regulation, especially important for safety-critical functions.
• Integrated Control Architecture: Built upon Woodward’s cutting-edge control architecture, it provides reliable and efficient control for their range of electric motor-driven valves and actuators.
• Resolver Feedback for Precision: By utilizing resolver feedback from the connected valve or actuator, the DVP establishes a highly accurate closed-loop control system, ensuring precise positioning, excellent repeatability, and minimal overshoot.
• ID Module Compatibility for Simplified Setup: Many newer Woodward valves and actuators come with an integrated “ID module.” When connected to the 8200-556 DVP, it can automatically read critical, valve-specific configuration information. This “plug-and-play” capability significantly simplifies installation, setup, and commissioning, reducing manual configuration errors.
• 125 VDC Power Input: This particular model is designed to operate seamlessly with a 125 VDC power supply, a common standard in many industrial control systems and existing plant infrastructures.
• Robust and Reliable Design: Despite its sophisticated internal electronics, the DVP is built for durability in industrial environments. Its IP30 rating means it should be installed within protected enclosures to ensure long-term reliability.

Technical Specifications (for the 8200-556 DVP)

Typical Applications

The WOODWARD 8200-556 Digital Valve Positioner is a core component in:

• Gas Turbine Fuel Control Systems: Precisely positioning gas fuel metering valves in power generation and industrial applications, especially when these valves are part of a safety instrumented function and operate on a 125 VDC control power standard.
• Steam Turbine Valve Actuation: Driving steam admission, extraction, or bypass valves for speed, load, and pressure control in steam power plants, particularly when these actions are safety-critical and require SIL compliance.
• Safety-Critical Industrial Process Control: Any industrial application requiring the highly accurate, dynamic positioning of valves or motors where adherence to Safety Integrity Levels is mandated and a 125 VDC power supply is standard.