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2 year warranty

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The Reliance Electric 0-56921-403 model is part of the GV3000 series of drives. This model is a regulator board that can replace outdated regulator boards. Typically the 0-56921-403 model is used with drives that operate on 1-5 HP.



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  • Part Number: 0-56921-403
  • SKU: 056921403RE
  • Manufacturer: Reliance Electric
  • Series: GV3000 Drives

0-56921-403 Technical Specifications

Part Number 0-56921-403
Series GV3000 Drives
Manufacturer Reliance Electric
Instruction Manual D2-3333
Product Type Regulator Board
Used With 1-5 HP Drives
Weight Less than 1 pound

Product Description

The 0-56921-403 device is classified as a part of the Reliance Electric Limited GV3000 line of AC Motor Control Drives and parts; this model is a replacement regulator board for the GV3000 drives. The board is used in drives designed with vector-based functionalities and can regulate the motor’s speed, torque, and directional control utilizing a pulse-width modulated signal.

The Regulator Board component is a required add-on module. The 0-56921-403 regulator board is outfitted with a microprocessor and can regulate the drive’s system because of it. The 0-56921-403 is designed to accept feedback signals from the power circuit, an external speed reference signal, and encoder data (when set up for Flux Vector Control regulation).

The 0-56921-403 can provide such functionalities as sending the PWM gate signals to the IGBT modules corresponding to the speed or frequency reference. It can display the data in a four-character display screen and regulate the 14 indicator LEDs. The 0-56921-403 is outfitted with an analog output and provides a snubber resistor brake signal.

The 0-56921-403 model is considered a replacement model for regulator boards that have gone out in the GV3000 drives; an extensive and lengthy procedure on how to remove and install the board without suffering personal injury can be found in section one of the D2-3333 manual. Please make sure that at all times, the installation or removal instructions are followed to ensure that it keeps the user from getting injured or potentially damaging the enclosure of the chosen GV3000 drive.

Frequently Asked Questions about 0-56921-403

What is the 0-56921-403 model?

The 0-56921-403 model is a replacement regulator board for GV3000 drives that operate at 1-5 HP. 

Are there differences between the 0-56921-403 and other 0-56921-5xx boards, such as the 0-56921-511 model?

Yes! One difference between all of the regulator boards available from Reliance Electric is the software type used. If the GV3000 drive has software that is 5.0 or greater, then the regulator board required must be a 0-56921-5xx board. If you use a replacement regulator board that is lesser or greater than the software on the GV3000 drive unit can cause faults and issues. The 0-56921-403 model is used with models that have 4.0 software.

I replaced the regulator board in my GV3000 module, and the settings reset; how do I fix it?

When you install the 0-56921-403 in the GV3000 drive, the parameter settings you previously set will have to restore the configuration of these parameters through the keypad or Configuration Executive 3000 (CE3000) software. The CE3000 software will have saved the configuration to the personal computer, and the software will need to be loaded up to reconfigure all of the parameters.

Reviews For 0-56921-403

Internal Review

The 0-56921-403 regulator board is an excellent purchase when needing to replace the internal regulator board of GV3000 drives that operate in the range of 1-5 HP. Make sure that when purchasing this regulator board to replace the one in the GV3000 drive that it is the correct model. - AX Control Tech

Repair Services For 0-56921-403

Type Lead Time Price Action
Repair Service 1-2 weeks $1190

Our highly skilled technicians can repair your 0-56921-403. 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