C•CURE 800/8000 Hardware Configuration Guide - Tyco Security ...

Wiegand CardsWiegand cards contain encoded information in an internal format thatresembles a bar code. A sensing coil inside a Wiegand reader creates amagnetic field so that when the wires inside the card interact with the reader’smagnetic field, they create low voltage impulses in the sensing coil.Depending on the arrangement of wires in the card, the voltage is eitherpositive or negative. The read head and small circuit board inside the cardreader (called a personality board) translate the card’s voltages and transmit theinformation to the apC.Some Wiegand cards have an external or emboss number that maps to aninternal number. The security manifest you receive with your cards matches acard’s emboss number with its internal number and also providesinformation about card format. The encoded information on a Wiegand cardcan include:• Parity information• Facility or company code• Card numberNOTEWiegand cards can use a variety of different formats. If you are uncertainabout what data is encoded in your cards, contact your dealerrepresentative.Twenty-six, 36-bit, and 37-bit Wiegand cards are common.A–6 C•CURE 800/8000 Hardware Configuration Guide