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  1. #1
    Join Date
    May 2001
    Location
    Western Wa
    Posts
    1,837

    Ananlog out to binary out converter gadget?

    I need to come up with way to have a binary output with adjustable on/off riding on a 0-10VDC output.

    Does anybody know of a DIN rail mounted gadget that would do this?

    Thanks...
    God Bless our Veterans

    God Bless the USA

  2. #2
    Join Date
    Dec 2004
    Location
    San Francisco Bay Area
    Posts
    479
    http://www.kele.com/Transducers/Mult...s/UCS-121.aspx - I've used these with good results..

  3. #3
    Join Date
    Feb 2005
    Location
    Where it's dark & damp
    Posts
    609
    If you mean you need to control a binary device from an AO you can use any of the following.

    Honeywell makes just such a device that is DIN rail mounted.
    http://europe.hbc.honeywell.com/prod...a/pg_mce3.html

    Functional devices has a ton of relays that will pick up off of 10vdc. The comon RIB relay is one of them. They also have track mounted ones if you want to install them in a panel.
    http://www.functionaldevices.com/pdf/RIBMU1C.pdf

    They also have multiple relays off of one AO that will pull up certain relays at specific volatges.
    http://www.functionaldevices.com/pdf/RIBMN24Q2C.pdf

    If you need to be able to adjust the pick up and drop off voltage I would buy the device mentioned in the post above. You could also use a sequencer for the purpose as well.

  4. #4
    Join Date
    Mar 2003
    Location
    NY
    Posts
    2,146
    Not sure what you mean by adjustable on/off. Why not just program the output to be at the relay voltage when you want it on. For instance: If PID = 75 then AO = 12vdc else AO = 0vdc. This is assuming your analog outputs are 0 - 12 volts.
    "Controls is a lifestyle not a job" -klrogers

  5. #5
    Join Date
    Jul 2002
    Posts
    889
    Has anybody run across adjustable relays that DO NOT need operating power. I have a couple things to control on an existing 2 conductor to the roof and there is no where to get power.
    Second place is the first loser.

  6. #6
    Join Date
    May 2001
    Location
    Western Wa
    Posts
    1,837
    It's a Mickey Mouse way to cycle on a spray pump and tower dampers on what is intended to be a cooling tower bypass. The "control contractor" left it with just a common solid state relay doing the switching, and at certain combinations of load and ambient, the relay "stutters".
    God Bless our Veterans

    God Bless the USA

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