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    How-to: Using Two Readers With One D9210B or 9210C

    Issue

    What needs to be done when using 2 readers in parallel and 1 D9210B or D9210C, but the readers are not working?

    Solution

    The D9210B/C module can support two readers in parallel, both readers will show access granted but it is not possible to tell the direction of travel. Two D9210B/C modules would be better because you can see a direction of travel. If using two K3003 or D8303 readers connected in parallel on a D9210B/C that are not working, there is a work around for this issue. (Same goes for any of the 3000 series KEY PAC Readers. ) Diodes can be used, 4 required, one diode for each Data 0 and Data 1 wire. Place the diode with the negative band towards the reader, use either a Standard Purpose Diode # 1N4003 (standard recovery rate), or a Glass Switching Diode # 1N914A (Fast Recovery Rate) for this application

    Version history
    Revision #:
    2 of 2
    Last update:
    ‎05-29-2018 04:22 PM
    Updated by:
     
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