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What Is An Automatic Door Controller?

What Is An Automatic Door Controller? | Sales: custsvc@autodoorandhardware.com

An automatic door controller is a computer that controls all of the functions of the automatic door. The automatic door control is a printed circuit board often housed on an aluminum enclosure, to protect it from grounding. In this article we explain in depth what the automatic door controller is and how it works.


Within each automatic door control is the most important component, the microprocessor chip. The microprocessor chip is programmable and executes all of the functions needed for an automatic door. For example, on an automatic door when a handicap push to open switch is activated, the signal is received by the microprocessor. The programmed instructions on the microprocessor tell it to provide voltage to the DC motor, allowing the door to open.

Power Supply and Voltage Regulator

On all automatic door controls is a power supply section which provides power to the control board. The power supply is typically made up of a step down transformer designed to receive 110VAC and step it down to a lower voltage like 24VAC. A voltage regulator made up of Mosfet transistors help regulate the voltage.


When the voltage of the automatic door control is stepped down it must be converted to DC instead of AC. To do this a built in rectifier is used.

Low Voltage Accessories

Automatic door openers depend on sensors and activation switches which allow pedestrians to signal that they need the door to open. On automatic door controls a low voltage accessory terminal block is present allowing it to power automatic door sensors and receivers.

Dry Signal Inputs

Also on the accessory terminal board are Normally Open dry input contacts, so the automatic door sensor or handicap button can communicate with the automatic door controller.

Automatic Door Controllers For Sale

If you are in need of a replacement automatic door controller or automatic door parts, then shop at www.autodoorandhardware.com. We carry all brands and models of automatic door controls. Order today and receive FREE shipping. For more information please contact custsvc@autodoorandhardware.com

Disclaimer: The material in this article has no regard to the specific installation, building code requirements, law requirements, authority having jurisdiction, local or state requirements, or any particular needs of any viewer. This article is presented solely for informational and entertainment purposes and is not to be construed as a recommendation or solicitation. Nor should any of its content be taken as advice. Automatic Door and Hardware is not an installation advisor. The views expressed in this article are completely speculative opinions and do not guarantee any specific result. Commercial doors, hardware, and automatic door parts should only be worked on by trained, qualified, and licensed professionals; failure to do so can result in danger. Any opinions expressed in this article are subject to change without notice. Automatic Door and Hardware is not under any obligation to update or keep current the information contained herein. Automatic Door and Hardware may have an interest in the securities and commodities of any entities referred to in this material. Automatic Door and Hardware accepts no liability whatsoever for any loss or damage of any kind arising out of the use of all or any part of this material. Automatic Door and Hardware recommends that you consult with a licensed and qualified professional before making any modifications or repairs to commercial doors, automatic doors, or hardware components of those doors. The content covered in this article is NOT to be considered as advice. I’m NOT an adviser. These are only my own personal and speculative opinions, ideas, theories, hypotheses, charts, technical analysis, insights, and curated news publications. The technical analysis in this article is completely speculative and does NOT guarantee any specific result. The technical analysis in this article has NO proven rate of accuracy. Do NOT repair or modify your doors and/or hardware based upon the analysis presented in this article. Always do your own research and only use trained and licensed professionals for any repairs or modifications. I will NOT be held liable for any of your personal repairs or modifications or any losses/damages that you may incur if you do repair or modify your doors and/or hardware. Information provided through this article is provided to you as is without any express representations or warranties of any kind, and we make no representation or warranty that this article (or any information provided in response to your inquiry), will be accurate, complete, or error-free. You agree that you must evaluate all information and responses, and that you bear all risks associated with, the use of this article, including any reliance on the accuracy, completeness, or usefulness of any information or materials made available through this article. This article is purely for entertainment purposes only!

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