Proximity Access Control System

proximity access control system are widely used in office, factory, bank. Supporting Master and Slave solution they provide more confidential access control system, 50 kinds of time zone settings and 5 open door groups ensure an absolute safety environment.

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Detailed Description for Proximity Access Control System

The proximity access control system is widely used in office, factory, bank, etc. Supporting Master and Slave solution it provides more confidential access control system, 50 kinds of time zone settings and 5 open door groups ensure an absolute safety environment.



1.Multi User / Amin Facility

2.Tamper Proof

 3.Supports 50 Time Zones, 5 Groups & 10 Unlock Combinations


Method of operation:

The card and the reader unit communicate with each other through 125 kHz radio frequency fields, (13.56 MHz for the contactless smartcard cards) by a process called resonant energy transfer. Passive cards have three components, sealed inside the plastic: an antenna consisting of a coil of wire, a capacitor, and an integrated circuit (IC), which contains the user's ID number in specific formats and no other data. The reader has its own antenna, which continuously transmits a short range radio frequency field.


When the card is placed within range of the reader, the antenna coil and capacitor, which form a tuned circuit, absorb and store energy from the field, resonating like an electrical version of a tuning fork. This energy is rectified to direct current which powers the integrated circuit. The chip sends its ID number or other data to the antenna coil, which transmits it by radio frequency signals back to the reader unit. The reader checks whether the ID number from the card is correct, and then performs whatever function it has been programmed to do. Since all the energy to power the card comes from the reader unit, passive cards must be close to the reader to function, and so have only a limited range.


An active card contains a flat lithium cell in addition to the above components, to power it. The integrated circuit contains a receiver which uses the battery's power to amplify the signal from the reader unit so it is stronger, so it can detect the reader at a greater distance. The battery also powers a transmitter circuit in the chip which transmits a stronger return signal to cover the greater distance.


A proximity card or prox card is a "contactless" smart card which can be read without inserting it into a reader device, as required by earlier magnetic stripe cards such as credit cards and "contact" type smart cards. The proximity cards are part of the contactless card technologies. Held near an electronic reader for a moment they enable the identification of an encoded number. The reader usually produces a beep or other sound to indicate the card has been read. Proximity cards typically have a read range up to 50 cm (< 15 inches)which is the main difference with contactless smartcard with 2 to 10 cm (1 to 3 inches) . The card can often be left in a wallet or purse[citation needed], and read by simply holding the wallet or purse near the reader. The term "proximity card" refers to the older 125 kHz devices as distinct to the newer 13.56 MHz contactless smartcards.

 Proximity cards can't hold more data than a magnetic stripe card. Only contactless smartcards can hold other type of data like electronic funds balance for contactless payment systems, history data for Time & Attendance or biometric templates. When used without encoding data, only with the Card Serial number, contactless smartcard have similar functionalities to Proximity cards.

Passive 125 kHz cards, the more widely used type which were described above, are powered by radio frequency signals from the reader device and so have a limited range and must be held close to the reader unit. They are used as keycards for access control doors in office buildings. Contactless smartcards are used for all other applications; library cards, contactless payment systems, and public transit fare cards.

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