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The 9900-432 is a forward-acting, 110V load sharing and speed control in the 2301A series from Woodward.



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  • Part Number: 9900-432
  • SKU: 9900432WO
  • Manufacturer: Woodward
  • Series: 2301A Electronic Load Sharing and Speed Controls

9900-432 Technical Specifications

Manufacturer Woodward
Series 2301A
Part Number 9900-432
Droop External Switch, Open Terminals 14-16
Idle Speed Select External Switch, Open Terminals 19-16
Load Sharing 0-6 VDC
Operating Temperature -40 to 85°C (-40 to 185°F)
Power Consumption </= to 15 W nominal
Standards CSA Certified
Vibration Endurance 4 Gs, 5 to 500 Hz

Product Description


The 9900-432 is a high-voltage, forward acting 2301A load sharing and speed control from Woodward. This control is designed to control load sharing and speed of generators which are driven by gasoline engines, diesel engines, steam turbines, or gas turbines. This model can be used in either isochronous or droop mode. 


As a forward-acting model, the 9900-432 will drive the actuator to the minimum fuel level if voltage is lost. The default speed setting for this model is 2,000-6,000Hz, but this can be changed via a switch to 500-1,500Hz, 1,000-3,000Hz, or 4,000-12,000Hz. In order to have a full 2301A system for a single engine with this part, all of the following are required: the 9900-432, a 90-150VDC or 88-132VAC (50/60Hz) power source, a speed-sensing device, a proportional actuator, and current and potential transformers.

System Specifications

The 9900-432 consists of a single printed circuit board inside a sheet-metal housing. The potentiometers of this model are all accessible from the front of this housing. The 9900-432 should be located somewhere with proper ventilation, space, and protection from elements such as water, high voltage, and excess vibration. This control is not designed to be mounted on the engine itself. This unit is rated for use in an environment with a temperature between -45°C and 85°C.

Frequently Asked Questions about 9900-432

What conditions should the 9900-432 be stored in?
The 9900-432 is rated for storage temperatures between -55 and 105°C. Humidity levels for both storage and operation should be below 95% at 38°C.
How much does the 9900-432 weigh?
The 9900-432 weighs approximately 1.9kg, or 4.2lbs.

Reviews For 9900-432

Internal Review

The 9900-432 is suited to a wide range of configurations thanks to its isochronous and droop modes. For example, it can work with a single engine, a single engine on an infinite bus, two or more engines in parallel, two or more engines which are controlled by other Woodward load sharing and control systems. This makes the 9900-432 able to be incorporated in many existing setups. -AX Control Lead Technician

Repair Services For 9900-432

Type Lead Time Price Action
Repair Service 1-2 weeks $1212

Our highly skilled technicians can repair your 9900-432. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
Learn More