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convert 5v to 24v dc using optocoupler

Discussion in 'General Electronics Discussion' started by ahujapalak, Jul 11, 2011.

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  1. ahujapalak

    ahujapalak

    2
    0
    Jul 11, 2011
    How can i convert 5v dc to 24v dc using an optocoupler max current requirement is 7.5mA max frequency 200KHz... Please give me the circuit for this.

    Thank you..

    Palak
     
  2. poor mystic

    poor mystic

    1,067
    31
    Apr 8, 2011
    Hi :)
    5VDC and 24VDC are ideas I understand, and 7.5mA is also good information, but 200kHz? This part of the prescription brings the whole process to a halt.
    Where does 200kHz come into it, please?

    And how do you envisage using the optocoupler, please?
     
  3. ahujapalak

    ahujapalak

    2
    0
    Jul 11, 2011
    Sorry m not that good at electronics ...

    But Details are as follows
    I am having 5v pulse output from servo drive
    I want to use this output in a plc using high speed counter
    Input to plc is 24v dc
    So i want to convert 5v pulses to 24v pulses using optocoupler
    Max current allowed at 24v is 7.2mA
    Counting speed of the counter is Max 200KHz..


    Thanking You

    palak
     
  4. poor mystic

    poor mystic

    1,067
    31
    Apr 8, 2011
    Thanks palak I'm nearly there
    bur what is the opto-coupler for?
    what PLC are you using?
     
  5. davenn

    davenn Moderator

    13,671
    1,892
    Sep 5, 2009
    well the opto coupler would provide isolation between the 2 sections :)

    D

    Edit ---- trying to find an opto that will happily handle 24V ---- the 4N35 abs max VC-E is 30V

    just not sure if you can do something like this......

    [​IMG]

    A current limiting resistor may also be needed in the collector or emitter line ??

    Dave
     

    Attached Files:

    Last edited: Jul 12, 2011
  6. poor mystic

    poor mystic

    1,067
    31
    Apr 8, 2011
    Sometimes you're better off using a pulse transformer. But I can't see quite enough of the cct to be sure whether that applies here.
     
  7. davenn

    davenn Moderator

    13,671
    1,892
    Sep 5, 2009
    I was still in the middle of editing my post when you posted ;)


    D
     
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