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  1. #1
    Join Date
    Dec 2019
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    Confused 24 VAC to 0-10VDC device

    Hi Everyone,

    New to the forum thought this would be a great website to post this question.

    I have a 24 VAC thermostat I need to control 0-10 VDC actuators with. Does anyone know a reliable device that will accomplish this? I don't need to modulate the actuators just open and close them.

    Thanks in advance.

    FYI any Inncom related questions I'm your man.

  2. #2
    Join Date
    Nov 2018
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    You might check with the manufacturer and see if a 24 vac signal will open the actuator. I know that Belimo has some that would.

  3. #3
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    May 2018
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    honeywell makes a stat that has 0-10 an 4-20 outputs. The ones i had at a site did the hot and chilled water valves.
    its a starting point to look at

    For your application.
    Can you take a standard 24 v output and make it modulate, no. is there some conversion board, you can look. But youre better off getting a 24v power open spring closed, or a floating actuator using a relay to make it open closed only.

  4. #4
    Join Date
    Dec 2006
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    As stated by mitch if you apply 24vac to the 0-10VDC terminal/wire on a Belimo it will drive full stroke, remove the 24vac and it will return to the original position. Or you can install a 10vdc power supply (or either 12vdc or 9vdc battery) and switch that (if thermostats contacts are relays and not triacs) to drive the actuator to 100% (90% if using 9vdc battery).

    kontrol out
    Last edited by kontrolphreak; 12-28-2019 at 07:38 PM.
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  5. #5
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    Honeywell TB7980B1005

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  6. #6
    Join Date
    Dec 2014
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    GA
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    there are fan coil unit thermostats that will do the trick.
    http://www.viconics.com/DATA/TEXTEDO...00-PIR-E03.pdf

  7. #7
    Join Date
    Dec 2019
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    Are they spring return actuators? If so just configure it to open with 0 volt dc signal. Then switch 24 on it will open full, remove 24 will spring closed.

  8. #8
    Join Date
    Jun 2016
    Location
    Saavannah GA
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    If it doesn't need to modulate then its easy. I would use a 24v relay (you may need a 24vac transformer to supply the t-stat) and 10vdc power supply just to isolate the two systems. When the t-Stat calls for (whatever) 24vac power is applied to the relay coil, then the NO relay relay contact closes supplying 10vdc to the actuator.

  9. #9
    Join Date
    Jul 2002
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    I've actually used a bridge rectifier and voltage halfer before.

  10. #10
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  11. #11
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    If God didn't want us to eat animals... He wouldn't have made them out of MEAT.

  12. #12
    Join Date
    Dec 2008
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    Quote Originally Posted by Tyrell View Post
    Hi Everyone,

    New to the forum thought this would be a great website to post this question.

    I have a 24 VAC thermostat I need to control 0-10 VDC actuators with. Does anyone know a reliable device that will accomplish this? I don't need to modulate the actuators just open and close them.

    Thanks in advance.

    FYI any Inncom related questions I'm your man.
    If it's a Belimo actuator, there is a way to wire it so it will act like a two-position actuator, with no added devices required. Check with your belimo rep, they should be able to help you out.

  13. #13
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    Quote Originally Posted by JohnLoves2ski View Post
    If it's a Belimo actuator, there is a way to wire it so it will act like a two-position actuator, with no added devices required. Check with your belimo rep, they should be able to help you out.
    https://www.belimo.us/support/Produc...on-control.htm
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