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Topic Title: Any bright sparks? Topic Summary: 12 volt door lock Created On: 01 October 2009 06:38 PM Status: Post and Reply |
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 01 October 2009 06:38 PM
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Hi all,
I have been asked to connect a new 12 volt dc door lock from an 12 volt ac existing intercom wiring,can it be done? Regards, Edd |
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01 October 2009 06:45 PM
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yes use a rectifier door lock company will supply them
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01 October 2009 06:46 PM
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Check the intercom first or download the data, it might already have aux NO or NC for door locks.
The door locks come in two types fail/open and fail/locked. regards ------------------------- "Take nothing but a picture, leave nothing but footprints!" ------------------------- "Oh! The drama of it all." ------------------------- "You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!" ------------------------- |
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01 October 2009 06:57 PM
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If the lock you have is for rim locks that lock when no voltage is present, you should be fine.
However, if it is the sort that requires constant voltage to lock, you may have to obtain a relay that will supply the lock voltage and then disconnect when energised. |
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01 October 2009 07:51 PM
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I will try and speak with the manufacturer,
thanks, all |
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01 October 2009 08:43 PM
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If the lock you have is for rim locks that lock when no voltage is present, you should be fine. However, if it is the sort that requires constant voltage to lock, you may have to obtain a relay that will supply the lock voltage and then disconnect when energised. Its not the voltage in question here, but that its an AC supply & a DC lock. Without knowing what the lock is beware most intercoms have a very low power supply and anything other than a standard type rim release will need a seperate power suppy, connected via a relay or clean contacts |
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01 October 2009 08:56 PM
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If the lock you have is for rim locks that lock when no voltage is present, you should be fine. However, if it is the sort that requires constant voltage to lock, you may have to obtain a relay that will supply the lock voltage and then disconnect when energised. Its not the voltage in question here, but that its an AC supply & a DC lock. I don't believe that I have said that the voltage is the question? I did say: "If the lock you have is for rim locks that lock when no voltage is present, you should be fine." Without knowing what the lock is beware most intercoms have a very low power supply and anything other than a standard type rim release will need a seperate power suppy, connected via a relay or clean contacts |
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01 October 2009 09:01 PM
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if you have a ac supply and want a dc supply buy a IN4001 diode probably about 10pence
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Any bright sparks?
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