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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MFPROT_LP датащи(PDF) 23 Page - rfsolutions.ltd |
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MFPROT_LP датащи(HTML) 23 Page - rfsolutions.ltd |
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23 / 35 page  ib technology 23 In this manner the user can select to use the UID (serial number) or user programmed information within a memory block as the base data for the Wiegand output. The complete data frame is output whenever the tag is within the RWD’s antenna field and the tag has been validated. This output is independent of the normal TTL serial interface which responds to received commands and replies with the data as requested. The physical Wiegand protocol is asynchronously transmitted as low going 50 µS pulses on the appropriate DATA low or DATA high pins. These pulses are separated by 2mS periods. The Wiegand sequence is output a single time whenever a valid tag enters the RF field for the first time. (NO Wiegand output if AUX OUTPUT parameter is ZERO/OFF). Wiegand Protocol Timing Diagram TTL level 5v 0v 5v 0v DATA High DATA Low 50 µS pulse 2mS pulse intervals DATA 1 0 1 0 |
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