Nedap uPASS Access Installation Manual
Also see for uPASS Access: Installation guideInstallation guide
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uPASS Access© Nedap AVI Page 10 of 193.2.3 WIEGAND / MAGSTRIPEThe wiegand interface connections also support magstripe.NEDAP UHF Wiegand tags will generate a wiegand message on the interface.NEDAP UHF Magstripe tags will generate a magstripe message on the interface.Other UHF tags will not generate a message on this interface, unless the 'Extra output' settings are used!The wiegand/magstripe output format is determined by the programmed format of the tag.Make sure to order the correct tag formatting if you want to use the wiegand or magstripe interface. See also theUHF tags order guide for more information.Connections:Wiegand connections Magstripe connectionsGRAY Data-0 ClockPINK Data-1 DataBLACK Ground GroundSHIELD Shield connected to DC-ground.Note: Extending these connections beyond the 5 meter pig tail length shall ONLY be allowed using shielded cable (4 x0.25 mm 2 ) as long as the total length is shorter then 150 meters (500 feet).The shield shall be connected to the metal case of the external device.3.2.3.1 WIEGAND TIMINGIn the figure below the Wiegand protocol timing is specified.Tpw5V0VDATA-15V0VDATA-0Tpi TpiTpwTiming constants:Tpi Pulse interval time 1msecTpw Pulse width time 50μsecFigure 3: Wiegand protocol timing3.2.3.2 MAGSTRIPE TIMINGThe magstripe message length is determined by the tag. The first character will be a start-sentinel (0xB). Themessage is terminated with an end-sentinel character (0xF) and an LRC character.The figure below shows the timing for one magstripe character. Each bit consists out of one period low(220μsec) and two periods high (440μsec). The Data-signal is valid and stable on the falling edge of the Clock-signal. Before and after the data 16 clock pulses are generated (postamble and preamble).3300μsec0 1 1 0 1220μsec660μsec5V0VCLK5V0VDATTiming constants:Clock period 660μsecClock high 440μsecClock low 220μsecData pre-amble 16 clock periodsData post-amble 16 clock periodsFigure 4: Magstripe protocol timing one character |
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