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  1. #1
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    Need a relay or chip 24vac DPST

    I need a relay or IC that when 2 pins are shorted (the input signal is either OPEN or a Short) 2 other sets of pins also short. Like a normally open DPST switch but instead of a manual push it would detect a short on the input pins and close the other 2 pairs. I need the 2 sets of outputs to open and close at the same time but be isolated from each other. I have 24vac powersupply to power this. What can I use?

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  2. #2
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    Re: Need a relay or chip 24vac DPST

    I don't know of any device that operates when you short the inputs. It sounds like your "input signal" is actually a contact closure, true? If so, why not just use the contact closure to apply voltage to a relay input?



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  3. #3
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    Re: Need a relay or chip 24vac DPST

    Hello slumlord,
    Please refer to the two pictures below:

    Click image for larger version. 

Name:	Short01.jpg 
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    The above is short detection, using an LED as an indicator.

    Click image for larger version. 

Name:	Open01.jpg 
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ID:	141505

    The above circuit is open detection, also using an LED as an indicator.
    SW1 acts as your short or open circuit.

    You could substitute the LED's for relays to do any switching you require, plus it would
    isolate one relay from the other.
    If the above pictures are not want you really want, then you need to explain a little
    further on what you require exactly.
    Regards,
    Relayer

    P.S. C1 should be changed to a 35 volt type...



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  4. #4
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    Re: Need a relay or chip 24vac DPST

    Wow, talk about overkill. Why use 13 components to drive a relay when you could use, um, zero components? Connect the 24 volts through the contact to the relay coil. Done.



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