Table of Contents

How Does RFID Access Control Work?

rfid access control

RFID access control systems are electronic systems that have access to a stable network that is designed to control through the network. Access control systems give complete protection ensuring security with the system as they recognize, authenticate, and authorize entry of a person into the premise. The access control system, using a smart contactless card, can be accessed by taping near the reader on the door. Access control systems have guaranteed high security to the premise, anyone, and everything in it.


RFID access control


RFID access control system uses RFID technology to verify a resident’s credentials either as a key fob system or type of key card. RFID (Radio Frequency Identification) enables wireless communication between a reader and an RFID tag that are tiny and inexpensive.


How does RFID work?


The RFID access control uses a system of readers, tags, and computer servers to allow door access to preregistered residents. To allow access they have to present the correct credentials either a card or key fob up to the reader. To establish a connection between the tags and the reader, the system uses one of several radio frequencies.

From across greater distances, high-frequency RFID systems can establish a connection between a reader and a tag but they are more expensive. These are suited for gate access control to power long-range readers. However, low-frequency systems are cheaper and a popular choice for RFID access control. They are better for indoor use and only activate up close.


Types of RFID access control systems


These include passive and active RFID access control systems. Though the process of using both systems remains the same, their main difference is the methods by which they establish a connection between an RFID tag and a reader.

Active RFID tags use batteries, therefore, they power themselves when they interact with a reader. Active readers are a popular choice for RFID touchless entry system providers as they are powerful enough to activate without having to be physically in contact with a reader.

Passive RFID tags don’t use batteries, therefore, they must harvest power from the reader’s electromagnetic field. They aren’t as powerful as active tags, they have a shorter range, but they don’t need to be replaced as often.


What happens when a resident uses an RFID key fob or card?


Upon arrival at the door, the resident will hold their RFID access card up to the reader and allow a wireless communication connection between the reader and the RFID tag. A connection to the RFID tag is established by the reader’s antenna and the RFID tag will use this connection to send data to the reader. The reader forwards the data to the control panel. The next step is verification of the resident’s credentials through the control panel. The control panel checks the received number encoded into the signals sent by the RFID tag against a database that is stored either on the cloud or locally. The control panel sends signals to the RFID door open and the door’s electric strike unlocks after it verifies the credentials. The door will then open and grant access to the resident.




The RFID access control system is effective for elevators because they allow the security to easily regulate who can access certain building floors. RFID key cards or fobs are easy for tenants to use and are easy to replace in case of loss or misplacement.


Learn more about RFID cards here.

Learn more about the special eco-friendly material we lately developed for RFID cards here.

Go to Top