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Thread: phasecut

  1. #1
    Join Date
    Jun 2007
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    31

    phasecut

    can anyone explain 0 - 20 phasecut to me. I don't know what phasecut means. I recently ran into some old staeffa actuators thar used this and would like to understand more about it.

  2. #2
    Join Date
    Aug 2005
    Posts
    145
    This is an uncommon control input signal.

    Phasecut: An actuator drives depending on the power result of a
    remaining wave. This signal type cuts the amplitude of the wave
    and the actuator recognizes this signal as a proportional movement.


    This control signal was used on the older Staefa proportional controllers. Some Belimo actuators can use this signal. OK

  3. #3
    Join Date
    Jun 2005
    Location
    Ohio
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    1,720
    Amplitude, meaning it chops off (goes horizontal) the peak of the sine wave.
    If you run into any older Staefa Smart cards, they'll have it.
    BTW, Atkinson Electronics sells a low cost 0-20V Phasecut to true 0-5 or 10 DCV board:http://www.atkinsonelectronics.com/p..._pdfs/ASM2.pdf
    jogas

  4. #4
    Join Date
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    Fort Worth\Dallas, Texas
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    Is that you James?
    Go Rangers!

  5. #5
    Join Date
    Jun 2005
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    Ohio
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    Quote Originally Posted by lwarren View Post
    Is that you James?
    Who are you asking? I'm not James.
    jogas

  6. #6
    Join Date
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    Quote Originally Posted by jogas View Post
    Who are you asking? I'm not James.
    jogas
    Yeah I was talking about jchapline, I think I might know him.

    Lane
    Go Rangers!

  7. #7
    Join Date
    Jan 2003
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    USA
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    1,666
    This should give you a good idea of phasecut
    Attached Images Attached Images  

  8. #8
    Join Date
    Jun 2007
    Posts
    31
    Yep, it's me. I ran into this on a job a felt like an idiot because I have never seen it. It seems like a well kept secret, from me at least, and then I started trying to run it down and could not find anyone else that even knew what I was talking about until I came to good ole HVAC-Talk.

    Thanks guys, I always know someone here will know the answer to anything.

    James

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