WOODWARD 8200-177 EM & LQ Digital Driver

Product Brief Description

Woodward 8200-177 is an EM and LQ digital actuator driver, designed to receive position setpoint commands from MicroNet turbine control systems and precisely drive Woodward EM / LQ series electromechanical actuators. It implements advanced closed-loop position control algorithms to compensate for actuator friction and inertia, delivering fast, repeatable valve positioning. It communicates with the main controller over RS485 interface and provides high-current output for actuator coils. This rugged driver unit is widely stocked as spare part for steam and gas turbine control skids in power and oil & gas industries.

Product Features & Functions

• Digital closed-loop position driver for Woodward EM and LQ electromechanical actuators
• Advanced control algorithm compensates for actuator inertia, friction and hysteresis
• Receives position command from MicroNet host controller via RS485 communication link
• High-current 24VDC actuator drive output, supports rapid valve stroke response
• Real-time feedback of actual actuator position back to the main turbine controller
• Built-in comprehensive self-diagnostics, detects actuator wire break, short circuit and driver faults
• Wide operating temperature range, suitable for hot and noisy turbine cabinet environments
• Status LED indicators for power, communication link, drive active and fault alarms
• Parameter configuration via Woodward DIP software for tuning control loop gains

Application Scenarios

• Gas turbine and steam turbine fuel valve / governor valve actuation control
• Centrifugal compressor anti-surge and throttle valve control skids
• Cogeneration CHP plants and captive power generation turbine systems
• Oil & gas refinery, pipeline turbomachinery control cabinets
• MicroNet system maintenance, actuator driver spare replacement and retrofits

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