WOODWARD 8400-706

WOODWARD 8400-706

WOODWARD 8400-706: ProAct™ Driver (for ProAct Actuators)

 

The Woodward 8400-706 is a ProAct™ Driver module. Its primary role is to provide the necessary power and control signals to a compatible Woodward ProAct actuator, enabling the actuator to precisely control the fuel or air flow to an engine or turbine. It works in conjunction with a separate electronic speed controller or position controller.

 

Product Overview

 

  • Product Type: Actuator Driver Module
  • Manufacturer: Woodward
  • Series: ProAct™ Drivers
  • Function: Supplies power and converts the control signal (e.g., from a ProAct speed control) into the appropriate drive signal for a ProAct actuator. This allows the actuator to accurately position itself.
  • Key Feature: Often listed as a replacement or direct counterpart to other ProAct drivers (like the 8400-011), indicating its role in powering and controlling ProAct actuators. It’s designed for use in robust industrial environments.
  • Integration: It forms a crucial link between a ProAct electronic controller (such as a ProAct Speed Control or Fuel Limiter) and a ProAct actuator (e.g., from the 8256-series).
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The Woodward 8400-706 is a specific part number for a ProAct™ Driver module. It’s a critical component in Woodward’s ProAct Digital Control Systems, acting as an interface and power supply for ProAct actuators.

 

WOODWARD 8400-706: ProAct™ Driver (for ProAct Actuators)

 

The Woodward 8400-706 is a ProAct™ Driver module. Its primary role is to provide the necessary power and control signals to a compatible Woodward ProAct actuator, enabling the actuator to precisely control the fuel or air flow to an engine or turbine. It works in conjunction with a separate electronic speed controller or position controller.

 

Product Overview

 

  • Product Type: Actuator Driver Module
  • Manufacturer: Woodward
  • Series: ProAct™ Drivers
  • Function: Supplies power and converts the control signal (e.g., from a ProAct speed control) into the appropriate drive signal for a ProAct actuator. This allows the actuator to accurately position itself.
  • Key Feature: Often listed as a replacement or direct counterpart to other ProAct drivers (like the 8400-011), indicating its role in powering and controlling ProAct actuators. It’s designed for use in robust industrial environments.
  • Integration: It forms a crucial link between a ProAct electronic controller (such as a ProAct Speed Control or Fuel Limiter) and a ProAct actuator (e.g., from the 8256-series).

 

Detailed Description

 

Woodward’s ProAct Digital Control Systems rely on precise coordination between their control modules, drivers, and actuators. The 8400-706 driver is engineered to reliably facilitate this interaction.

Key characteristics of the 8400-706 include:

  • Actuator Power Supply: Its core function is to provide the electrical power required to operate the ProAct actuator. Actuators, being electro-mechanical devices, need a dedicated power source that can deliver the necessary current for rapid and powerful movements.
  • Signal Conditioning: It receives a low-level command signal from a ProAct electronic controller and converts it into a higher-power, precise drive signal that the actuator can interpret and respond to. This ensures accurate positioning of the actuator’s output shaft.
  • Interface: It acts as the bridge between the “brain” (the speed/position controller) and the “muscle” (the actuator) of the control system.
  • Robust Design: Like other Woodward industrial components, the 8400-706 is built to withstand harsh operating conditions, including vibrations, temperature fluctuations, and electromagnetic interference often found in engine environments.
  • Compatibility: It is designed to be compatible with a range of ProAct actuators (e.g., ProAct 75 Actuators like 8256-259 or 8256-260) and ProAct electronic controllers (e.g., 9907-series speed controls or 8400-series fuel limiters).
  • Common Pairing: Documentation often shows the 8400-706 as a preferred replacement or compatible driver for the “ProAct 75 Driver + Actuator” combinations, replacing or working alongside older driver models like the 8400-011.

 

Applications

 

The Woodward 8400-706 is an essential component in control systems for:

  • Diesel Engines: Powering actuators that control fuel racks for speed and load regulation.
  • Gaseous Engines: Driving actuators that manage gas valves, mixers, or throttle bodies for precise speed and air/fuel ratio control.
  • Gas Turbines: Providing control for fuel valves or inlet guide vanes.
  • Power Generation: Integral to engine-generator set control systems, ensuring stable electrical frequency by precisely controlling the prime mover.
  • Industrial Pumps & Compressors: Used in systems where engines drive these machines, requiring accurate speed or flow regulation.

 

Related Products/Series

 

The 8400-series broadly covers ProAct controllers and drivers, while the 8256-series is typically for ProAct actuators. Other related part numbers in the ProAct ecosystem include:

  • 8400-011: A common ProAct Driver that the 8400-706 often replaces or is interchangeable with.
  • 8400-020: Another variant of a ProAct Driver.
  • 8400-703 / 8400-704: Other specific ProAct Driver models, each potentially having minor variations or different output capabilities.
  • 8256-259 / 8256-260: Common ProAct Actuators that would be driven by the 8400-706.
  • 9907-1290 / 9907-1289: ProAct Model II and Model I Speed Controls, respectively, which would send their commands to the driver.
  • 9907-1291: A ProAct Plus Digital Fuel Limiter, which also sends control signals to the driver/actuator path.

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