Learn About Proximity Cards

Convenience is desirable and what is easier than approaching a door, opening it and walking in, just as if it were unlocked?

With proximity cards, such ease of ingress can be achieved without compromising security. A credit card-sized card can be kept in a wallet, briefcase or purse and when a person walks within three feet of a door, a reader will recognize the card and unlock the door.

How Proximity Cards Work

Embedded in every proximity card is a special circuitry where its ID number is encoded and an antennae that is used to transmit data using radio frequency.

There are two types of proximity cards: active or passive. Active proximity cards are typically larger and thicker and contain a battery that powers the embedded circuitry. Passive cards do not have its own power source. It draws its power from the reader when it comes within its proximity.

Active cards are typically used for application where the reader must read the card from a longer distance such as cars entering a car park. Passive cards are typically used for access in and out of offices and building.

Proximity readers use an antenna that transmits RF, usually low frequency RF. When an access card enters the the RF field, it transmits a signal back to the reader, which then decodes the signal and grants or denies access.

To learn more, click on the links below:

• Card Access System
• Standalone and Networked
• Proximity Technology
• Fingerprint Biometrics