Hotel Access

Discussion in 'The Projects Forum' started by drchris, Apr 19, 2010.

  1. drchris

    Thread Starter New Member

    Apr 4, 2010
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    i try to fix a module to deactivate the hotel's room airconditioner after 30sec of the opening of the door. I got a magnetic contact in the door and i need to give a N/O contact to the air conditioner technician not through a relay but through an optocoupler. Any ideas please??? Thank you
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    this is not simple as you think.
    you need to show us your AC connection terminals and a brief description of what you want to do.
    Modifying or adding circuits to an already operating equipment are not for beginners.
     
  3. drchris

    Thread Starter New Member

    Apr 4, 2010
    2
    0
    I placed the alarm security system. The A/C technician needs only a N/O contact without wiring connection(but through the optocoupler) from the magnetic contact of the door. Our project is till there, the connection of this is not our business.
    I just need to open the contact after a few seconds of opening the door.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    for that you will need the circuit diagram
    But for me the circuit board is all I need to do it.
     
  5. retched

    AAC Fanatic!

    Dec 5, 2009
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    You can use a delay-on-break relay.
    You can send a small signal through your door contact. When the signal is broken (if its NC and the door is opened) it will break the connection to rhe delay-on-break relay.

    The relay will count the amount of time you set then kill the AC.

    http://www.airotronics.com/site/timing_delaybreak.php

    the relay can operate an optocoupler, but I am confused why you need the opto. The relay I linked to has 100% load isolation.
     
  6. eblc1388

    Senior Member

    Nov 28, 2008
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    Personally I think the timing should be implemented by the A/C guy on his side.

    You just give him the current opened/closed status of the door and he decides when to turn on/off the A/C.

    Come to think of it, problems or fault in the security system or wiring could result in rapid closed/opened status and rely on this signal to turn On/Off the A/C will damage the A/C. The onus is on the A/C circuitry to prevent such condition from damaging his equipment.
     
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