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5461-778 - Liquid Final Driver Module is available in stock which ships the same day.
5461-778 - Liquid Final Driver Module comes in UNUSED as well as REBUILT condition.
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SPECIFICATIONS:
Part Number: 5461-778
Manufacturer: Woodward
Series: MicroNet / NetCon 5000
Product Type: Liquid Fuel Final Driver
Output Current: 0–200 mA (High-precision)
Input Signal: Digital Bus / VME Interface
Channels: Single or Dual Channel Actuator Drive
Operating Temperature: -40 °C to +70 °C
Mounting: Chassis / Rack Mounted
Weight: 1.2 kg
Availability: In Stock
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
The 5461-778 Liquid Final Driver Module is a specialized power-output interface designed for Woodward MicroNet and NetCon 5000 control systems. Its primary purpose is to provide the high-accuracy analog current necessary to drive liquid fuel valves and actuators on gas turbines and large industrial engines. The module receives digital positioning commands from the Master CPU and converts them into a regulated current signal, ensuring that the fuel delivery matches the precise requirements of the combustion control algorithm. Engineered for high-speed response, the Driver Module is critical for maintaining stable combustion and preventing turbine hunting or speed oscillations during rapid load changes.
PRECISION LIQUID FUEL ACTUATION:
This module is optimized for the unique dynamics of liquid fuel systems, which often require higher resolution and faster recovery times than gas systems. The Driver Module features sophisticated current-loop feedback circuitry that monitors the actual output to the actuator in real-time, correcting for changes in coil resistance caused by temperature fluctuations. This closed-loop internal monitoring ensures that the fuel valve position remains exactly where the controller commands it, even in the harsh, high-heat environments typical of turbine enclosures. The result is a highly linear fuel-delivery curve that enhances overall thermal efficiency and reduces emissions.
SYSTEM INTEGRATION AND SAFETY:
The Driver Module is built to the VME standard, allowing it to communicate over the high-speed system backplane for seamless integration with other MicroNet modules. Safety is a core feature, as the board includes dedicated Watchdog timers and fail-safe logic. In the event of a communication loss or a detected internal fault, the module can be configured to automatically drive the liquid fuel valve to a minimum-fuel or shut-off position. This hardware-level protection is a vital safeguard against overspeed events. Additionally, the module’s aluminum faceplate provides efficient heat dissipation, ensuring long-term reliability without requiring active cooling.
AVAILABILITY AND SUPPORT:
World of Controls offers the 5461-778 Liquid Final Driver Module in both unused and fully refurbished conditions. To ensure the highest level of field reliability, every unit undergoes rigorous dynamic load testing that simulates actual turbine startup and full-load conditions. We provide a comprehensive warranty on all units and offer 24/7 technical support for system calibration and troubleshooting. Our global logistics team is prepared to provide rapid delivery for both scheduled maintenance and emergency repair needs, keeping your liquid-fuel power systems operational.
What is the Woodward 5461-778?
The Woodward 5461-778 is a Liquid Final Driver Module used in MicroNet and NetCon systems. It is responsible for converting digital control signals into the precise analog current (typically 0-200 mA) required to operate liquid fuel actuators and valves. It serves as the final electrical link between the control logic and the physical fuel delivery system.
What is the primary use of the Woodward 5461-778?
This module is primarily used in gas turbine control applications that utilize liquid fuel as their primary or backup energy source. Its role is to ensure that the liquid fuel valve responds accurately to the controller's commands, providing smooth and stable fuel delivery during startup, synchronization, and full-load operation.
How does it handle temperature changes in the field?
The Driver Module includes temperature-compensation circuitry that monitors the resistance of the connected actuator coil. As the engine room heats up, the module automatically adjusts its output to ensure the delivered current remains consistent, preventing valve drift or inaccuracy that could lead to system instability.
Does this module support fail-safe operation?
Yes, the Driver Module is designed with integrated fail-safe logic. If the module detects a loss of signal from the main processor or an internal hardware failure, it is programmed to drive the actuator to a pre-defined safe state, usually the minimum fuel or closed position, to prevent uncontrolled turbine acceleration.
