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  1. #1
    Join Date
    Oct 2012
    Posts
    24

    Bypass NPN prox switches from PLC

    Hi good day,


    someone has an idea on how to bypass a NPN N.O Prox Switch? Well I have a Mitsubishi FX1s-30MR PLC.. Im planning to bypass the Prox Switch..

  2. #2
    Join Date
    Dec 2003
    Posts
    24221
    What do you mean by 'By pass?'
    Jumper it out or replace with a different style, 2 wire prox or L.S. etc?
    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
    Join Date
    Oct 2012
    Posts
    24
    Al,


    either jumper it out or cancel it from my Mitsubishi PLC.. or much better to jumper it just for a while..cause my prox is broken..

  4. #4
    Join Date
    Dec 2003
    Posts
    24221
    I just realized this a PLC not CNC, I have programmed the The FX-s and they come configured with optional pull up or pull down.
    I am not sure if you can access the Mits site where you are, but the manuals are all on the MEAU site if you need them.
    But if this is a NPN, the the input is source, so you should be able to jumper from the Prox Input terminal to 24 -ve or common.
    This will simulate an ON condition.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

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

  5. #5
    Join Date
    Oct 2012
    Posts
    24
    there are 3 wires on it, brwn (+), black, blue(-). just to be sure and clarification ,you want me to connect/jumper black and brown (+) or black and Blue(-) .then that connect to PLC? 'cause i already remove the Prox

  6. #6
    Join Date
    Dec 2003
    Posts
    24221
    Remove the prox completely and just use a single jumper from the prox input to the 24v common terminal, this is usually supplied from the PLC for inputs.
    This would have been the BLK & Blue on the original.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

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

  7. #7
    Join Date
    Oct 2012
    Posts
    24
    Al,

    thanks a lot, you save the day. thanks for your help..

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