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IndustryArena Forum > CNC Electronics > General CNC Machine Related Electronics > Want to add proxy switches for travel limit
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  1. #1
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    Want to add proxy switches for travel limit

    Looking at the option of adding Omron TL-Q5MC1 proximity switches for travel limit rather than simple snap contact switch, but am unsure if a PNP switch will work with the board. I am using a NOVUSUN NVCM6V2.1 Bought on Amazon. Will a PNP sensor work with this board?

  2. #2
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    Re: Want to add proxy switches for travel limit

    Like many of these Chinese units, the documentation is lousy!
    I could not find out if they were sink or source inputs, it just says 'Programmable'??
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  3. #3
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    Re: Want to add proxy switches for travel limit

    Have a look at your current snap contact switches. If they connect the input to negative or zero, then I would use NPN. If they connect the input to a positive voltage I would use PNP.
    NPN makes a connection to the Negative wire of the sensor.. PNP makes a connection to the positive wire of the sensor.

  4. #4
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    Quote Originally Posted by Toinvd View Post
    Have a look at your current snap contact switches. If they connect the input to negative or zero, then I would use NPN. If they connect the input to a positive voltage I would use PNP.
    NPN makes a connection to the Negative wire of the sensor.. PNP makes a connection to the positive wire of the sensor.
    Thanks, as it turns out, the board does use the negative side. Your response cleared it up for me.

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