Activity Forums Questions & Troubleshooting Hardware 3-Wire RS232 MAXI Automation

  • 3-Wire RS232 MAXI Automation

     Lukas updated 1 year, 5 months ago 2 Members · 2 Posts
  • Anonymous

    Deleted User
    August 10, 2020 at 2:06 pm

    Does Controllino have an RS232 interface?

    I am trying to connect to a 3-wire RS232 interface with pinout: GND, RxD, and TxD.

    The RS232 voltage levels are -15v : +15v. What is the proper way to shift the voltage levels to 0-24v of controllino TX and RX pins?

  • Lukas

    August 10, 2020 at 2:57 pm


    MAXI Automation has no RS485 or RS232 interface.

    It has only 5V UART interface on the pin header. So you need an external UART to RS232 converter.

    Standard MAXI and MEGA CONTROLLINOs have RS485 interface at the screw terminal. There you will need RS485 to RS232 converter.

    Best regards,


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