Light Curtain Sensor wiring

Discussion in 'General Electronics Chat' started by anhnha, Mar 7, 2015.

  1. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    It took me a lot of time reading about wring light curtain sensor but actually until now I still can't make it work.
    I connected light curtain as in the picture. Basically, two OSSDs work fine.
    The problem is that the LED indicators doesn't change their color when there is an object protruding the light curtain area.
    How should I wiring so that LED indicators change their color as object passing the light curtain area?


    [​IMG]
     
    Last edited: Mar 8, 2015
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Do you have part numbers?
    Max.
     
  3. anhnha

    Thread Starter Active Member

    Apr 19, 2012
    774
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    I think it is GL-S08FH, not actually sure though...
    Tomorrow I will recheck again.
     
  4. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    By the way, what does it mean to say "NPN output cable"?
    I heard about NPN and PNP input/output type but never heard about NPN/PNP output cable.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    NPN/PNP output usually refers to push pull output.
    Page 6 of the manual gives the different I/O configurations for NPN/PNP.
    Max.
     
    Last edited: Mar 8, 2015
  6. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    I just reattached the manual in post #1. I thought I uploaded it before. In this manual, I/O configurations are in page 21.
    Do you have any idea about LED indicators?
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Page 6 here gives a better desc. what model do you have sink or source outputs?
    Max.
     
  8. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    I am not at work right now but it may be GL-S08FH. It does not have seven segment led.
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    What LED indicators are you referring to?
    Do you get an output when the curtain is blocked?
    Max.
     
  10. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    I mean center indicator as in your manual. The output OK when curtain is blocked.
     
  11. MaxHeadRoom

    Expert

    Jul 18, 2013
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    So what you are saying is the when the light curtain is broken you get an output but the built in indicator LED does not indicate it?
    Max.
     
  12. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    Yes, when there is an object blocking the light curtain, it can detect, two output OSSDs change states but these LED indicator doesn't change their color.
     
  13. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    The model is GL-S08FH. I can't find any description about center indicator wiring. Hope anyone has some idea why these indicators doesn't change color.
     
  14. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    I just figured it out. By changing to channel B, the LED indicator is green in normal operation and red blinking as light is blocked.
     
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