Proximity Sensor Wiring Issue? Help needed. - Page 4


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Thread: Proximity Sensor Wiring Issue? Help needed.

  1. #37
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    Default Re: Proximity Sensor Wiring Issue? Help needed.

    I would test with a meter to verify as that seems to be your original concern. I think on your bob both 12v neg and 5v neg are tied together. On boards that I use I keep them isolated



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    Default Re: Proximity Sensor Wiring Issue? Help needed.

    What should the meter measure across the wires?



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    Default Re: Proximity Sensor Wiring Issue? Help needed.

    if you must connect multiple normally closed NPN sensors to one BOB input this is one possible solution

    Proximity Sensor Wiring Issue? Help needed.-npn-sensor-one-bob-input-jpg

    John



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    Default Re: Proximity Sensor Wiring Issue? Help needed.

    you should see 12.xx on the meter with red meter probe connected to brown and black meter probe connected to blue wires of the sensor . when the axis is off the home position and led lit you should measure less than 1 volt across(Blue) GND and (Black) PIN 12 terminal on the BOB this should measure the same for all sensors and there associated input pin



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    Default Re: Proximity Sensor Wiring Issue? Help needed.

    Quote Originally Posted by john-100 View Post
    if you must connect multiple normally closed NPN sensors to one BOB input this is one possible solution



    John
    Hmm that seems a little complicated but I guess I understand the wiring and the components.

    I was thinking something like this, but since none suggested it, I guess it cannot work like this?


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    Quote Originally Posted by sparkness View Post
    you should see 12.xx on the meter with red meter probe connected to brown and black meter probe connected to blue wires of the sensor . when the axis is off the home position and led lit you should measure less than 1 volt across GND and PIN 12 terminal on the BOB this should measure the same for all sensors and there associated input pin
    Great. I will test it next time.

    Attached Thumbnails Attached Thumbnails Proximity Sensor Wiring Issue? Help needed.-npn-sensor-one-bob-input-jpg  


  6. #42
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    Default Re: Proximity Sensor Wiring Issue? Help needed.

    another NPN sensor adaptor

    Proximity Sensor Wiring Issue? Help needed.-74hc05-adaptor-jpg


    you can not connect NPN sensors in series

    but you can connect normally closed PNP sensors

    Proximity Sensor Wiring Issue? Help needed.-pnp-sensor-one-bob-input-jpg

    John



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    Default Re: Proximity Sensor Wiring Issue? Help needed.

    Cool.
    I could also just use simple NC switches as limits and be done with it.



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Proximity Sensor Wiring Issue? Help needed.

Proximity Sensor Wiring Issue? Help needed.