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  1. #1
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    Feb 2007
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    188

    I need help about C9 2.1DC Mini Relay Board

    Hello everyone
    Some years ago I bought a C9 Mini Relay from CNC4PC
    I never use it and remain in a drawer.
    Now I would like to use it, but I dont have any information about it.
    They dont sell it anymore.
    I write to CNC4PC without response
    If some one knows the device, please send me the info.about especifications
    Sorry my bad english.
    Thanks in advance
    Rene

  2. #2
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    Nov 2012
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    Re: I need help about C9 2.1DC Mini Relay Board

    It's an opto-isolated transistor switch that can handle a small DC load such as a contactor or a fan motor. The transistor specs are 100V 6A max. Judging by the resistor value, the control voltage is about 12V max.

    What are you planning to do with it?

  3. #3
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    Quote Originally Posted by CitizenOfDreams View Post
    It's an opto-isolated transistor switch that can handle a small DC load such as a contactor or a fan motor. The transistor specs are 100V 6A max. Judging by the resistor value, the control voltage is about 12V max.

    What are you planning to do with it?
    Thanks for your fast replay
    Iam trying to use it for hook NPN NO proximity switches as limits swich
    I have a hobby cnc board.

    My idea is connect the black wire from sensors to pulse connector in relay
    Input voltaje is around 30vdc ( its possiblento reduce it)
    Then in the other side, join the GND and Input Pin
    While the sensor is not activate will give Signal to relay and limits will stay
    High, when the sensors get activate in the black wire is 0 volts and limits will go active low.

    Not sure if you will understand my fatal english

    Here is a diagram, I think it will helps


    Thanks in advance
    Attached Thumbnails Attached Thumbnails 9A5B2ED5-D5ED-4271-A801-CDA3DB5D3B12.jpg  

  4. #4
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    Feb 2007
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    I will connect sensors to 35v power supply.
    I have a LM317 for reduce input voltaje to sensors
    It will be very useful know how many volts can handle tje c9 in pulse conmector.



    Thanks in advance

  5. #5
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    Nov 2012
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    Re: I need help about C9 2.1DC Mini Relay Board

    I don't think you need the C9 board for this. An NPN proximity switch already has the same exact circuit inside (an open-collector transistor). You can connect the proximity switch directly to the Hobby CNC board.

    And your English is perfectly fine, don't worry about it. :wave:

  6. #6
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    Quote Originally Posted by CitizenOfDreams View Post
    I don't think you need the C9 board for this. An NPN proximity switch already has the same exact circuit inside (an open-collector transistor). You can connect the proximity switch directly to the Hobby CNC board.

    And your English is perfectly fine, don't worry about it. :wave:
    Thanks!!!
    Today I found the Relay info. Search for Relay in all HD and finally I found it!!
    Think that I bought it around 10-11 years ago.

    Thanks for the info,
    Then the relay will remain in the drawer for next ocassion
    I will build a circuit with LM317 and 2R for get around 5v o little less
    and connect it to Input pin. I will be careful to dont fry the controller...

    Many thanks again.

  7. #7
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    960

    Re: I need help about C9 2.1DC Mini Relay Board

    I think you are overcomplicating things. The proximity switch has an open collector output, you can directly connect it to the board input without frying anything. You don't need any 5V regulators or resistor dividers, you can power the switch with whatever voltage you have available. Are the switches rated "5..36VDC"? Then the 24VDC fan output should work nicely.

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