Activity Forums Questions & Troubleshooting Controllino with Meanwell 0-10V LED power supply

  • Controllino with Meanwell 0-10V LED power supply

  • Alex_S

    March 15, 2023 at 4:34 pm


    I want to connect a Mean Well PWM-120-24–120–24

    power supply to a 0-10V PWM output of a Controllino MEGA
    (e.g. output D15 used as analog-out)

    But it doesn’t work. If I check the output with a measuring device, I can measure different values. But if I connect it to DIM+ the power supply, it’s always “on”.

    (DIM- is connected to – of Controllino)

    Is it necessary to add a resistor between Dim+ and Dim- ?

    I tried 100K but it wasn’t the desired success.

    Any ideas?

    Thanks, Alex.

    • This discussion was modified 1 year, 3 months ago by  Alex_S.
  • Jarda

    March 17, 2023 at 1:09 pm

    Dear Alex,

    CONTORLLINO MAXI Automation shall be able to delivery 0-10V on the output (resistor 500 Ohms is internally inside the CONTORLLINO to GND as default. So you shall get the voltage on the output.

    Yes, DIM+ shall be connected to AO0 or AO1 and DIM- to GND. Please try to measure the voltage on this pin via Multimeter.



    • Jarda

      March 17, 2023 at 1:21 pm

      Hello Alex again,

      now I’m reading that you are using D15, so you dont have CONTROLLINO Automation and you HAVE MEGA, so you are using PWM control. Sorry for my mistake 😉

      Yes, load resistor helps in your case, maybe you can go little bit lower to for example 10K, because current at meanwell power supply is in uA so maybe because of internal capacitance there is still some voltage.

      I hope you have version of the power supply for PWM, not for DALI ;-).

      Also please note, that PWM input of the meanwell power supply shall be around 10V, so dont use your controllino at 24V 😉

      Next point is, that Meanwell power supply needs around 1.5kHz the PWM, it is on the border of possibilities of CONTROLLINO output. So probably output is not able to achive this frequency and on the ouput is “only” the voltage, not PWM. Please check it via oscillocope.

      Best Regards


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