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  1. 09-29-2010, 07:01 AM #1
    mathias
    mathias is offline Professional Member
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    Cool Allen Bradley VFD

    Hello guys,
    I have a process chiller that someone has installed vfd's Allen Bradley powerflex 4 on the condenser fan, does the vfd have a powersource or do I need to insall one and what transmitter do I need the one on there only has 2 wires which is telling me that it is not a high pressure transmitter which is always three wires! thanks guys.
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  2. 09-30-2010, 12:09 AM #2
    Randy S.'s Avatar
    Randy S.
    Randy S. is offline Professional Member*
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    May 2001
    Location
    Western Wa
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    It might be just a two wire analog signal. I'd say track the wires down, and have in hand a manual for that drive. I'm not familiar with that particular VFD, but many these days have their own power source for sensors, and some can even run the whole PID process.
    You may have a two wire transmitter.

    Chances are you can find the manual on line with a Google search.
    God Bless the USA
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