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High Voltage, Low-Speed Model 8280-481 from Woodward Series 723PLUS of Digital Controllers with a power supply rated for 90-150 Vdc. This is a programmable unit for applications requiring two magnetic pickups or proximity switches. It can be used in load-sharing systems as it contains supported circuitry and connections.



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  • Part Number: 8280-481
  • SKU: 8280481WO
  • Manufacturer: Woodward
  • Series: 723 and 723PLUS Digital Control

8280-481 Technical Specifications

Weight 6.5lbs.
Power Supply Rating 90–150 Vdc (125 Vdc nominal)
Part Number 8280-481 | 723PLUS Low Speed with high-voltage power supply
Dimensions (inches) 16.25W x 11.5L x 2.375H
Manufacturer Woodward
Manual 02879
Impedance 2.3 kOhms
Features Metal Chassis for Hazardous Locations

Product Description

8280-481 is a high voltage (90 to 150 Vdc) controller and is one of the Woodward 723PLUS Analog Load Sharing Digital Speed Control units designed for low-speed engines. Low-speed engines are those rated at 130 rpm or less. A low-voltage version of this low-speed controller is also available, as are high and low-voltage options for high-speed engines.


Control options of the 8280-481 include:

  • Magnetic pickups (minimum 400 Hz magnetic pickup frequency)
  • Proximity switch input (speed signal frequencies below 1000 Hz)
  • 4-20 or 0-200 mA actuator outputs
  • 0-1 or 4-20 mA analog outputs
  • Tandem actuator outputs


Two serial ports and a LON channel offer several communication options, including external Modbus compatible devices, Woodward LinkNet I/O nodes, ServLink devices (for clients such as Watch Window and Control View), and a Woodward’s Hand Held Programmer (part 9907-205).


723PLUS Digital Speed Control for Reciprocating Engines— Analog Load Sharing Installation and Operation Manual 02879 has more information on accessories that are compatible with this controller. This includes the communication options listed above as well as devices dedicated to loading control and other generator control functions.


The 8280-481 is in a sheet-metal chassis for hazardous locations, but precautions still need to be taken when selecting a location for the 723PLUS Speed Control. The hardware is susceptible to electromagnetic interference and should be protected from high-voltage and high-current devices. It should also be protected from vibration, and direct exposure to water (including condensation-prone environments) and should be mounted in a location where adequate ventilation and a –40 to +70 °C temperature range are maintained during operations. Manual 02879 has additional safety precautions and should be consulted before selecting a mounting location for this control.

Reviews For 8280-481

Internal Review

Unit 8280-481 (High Voltage, Low Speed) is a durable Woodward controller that adheres to industry standards with CE Marked and UL listing and supports UL hazardous locations Class I div 2 Groups A/B/C/D. - AX Control Inc.

Repair Services For 8280-481

Type Lead Time Price Action
Repair Service 1-2 weeks $1782

Our highly skilled technicians can repair your 8280-481. 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
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