Woodward 8200-188 Digital Valve Positioner Actuator Controller

Product Overview

The 8200-188 from Woodward is a high-performance digital valve positioner and electric actuator drive engineered for precise motion control of motor-driven valve systems.
Designed for demanding industrial duty, this unit combines closed-loop position control, high-resolution feedback processing, and advanced diagnostics to ensure stable and repeatable valve operation across a wide operating range.

The controller supports both Limited Angle Torque and Brushless DC actuators, making it suitable for turbine, process control, and energy applications where accuracy and response time are critical.

Key Technical Characteristics

• Control type: Digital valve positioner / electric actuator driver
• Rated input supply: 125 VDC
• Maximum output power: 5 kW continuous
• Protection class: IP30 (panel-mounted environments)
• Dimensions: 261 mm × 173 mm × 57 mm
• Weight: 2.6 kg
• Environmental rating: industrial ambient temperature range
• Compliance listing: Non-SIL, North America

Control Interfaces and Communication

• Configurable command inputs including 4–20 mA, 0–5 VDC, PWM, and CANopen
• Ethernet interface supporting EGD-based communication and configuration
• Terminal block I/O for discrete and analog field wiring
• Resolver-based position feedback for closed-loop control accuracy

Actuator and Motor Compatibility

The 8200-188 is designed for direct integration with Woodward motor technologies, including:

• Limited Angle Torque (LAT) actuators
• Brushless DC (BLDC) electric motors

This compatibility allows precise torque and position control without the need for external drive electronics.

Control Performance and Diagnostics

• Adaptive PID control with automatic tuning for stable positioning under varying loads
• High-speed internal data capture for performance evaluation and troubleshooting
• Continuous monitoring of actuator health, position deviation, and drive status
• Deterministic response for fast valve positioning and repeatability

Installation and Operation

The controller is intended for cabinet or panel installation in protected environments. Configuration and commissioning are performed through Ethernet or local interfaces, reducing setup time and simplifying maintenance activities. The internal architecture emphasizes long-term reliability and serviceability.

Typical Application Areas

• Steam and gas turbine valve positioning in power generation systems
• Flow and pressure control in oil and gas production and compression facilities
• Process valve actuation in chemical and petrochemical plants
• Motor-driven valve control in water treatment and distribution systems

FAQ

What type of feedback does the controller require
The unit operates with resolver-based position feedback supplied directly from the actuator or valve assembly.

Is the 8200-188 suitable for safety-instrumented systems
No. This model is rated as Non-SIL and is intended for standard control applications.

Can the control signal be changed after installation
Yes. Input signal types are software configurable, allowing adaptation to different control architectures.