Connect MCU to RS-485

Discussion in 'The Projects Forum' started by jean28, Sep 5, 2014.

  1. jean28

    Thread Starter Member

    Sep 5, 2012
    76
    0
    Good day, guys

    I want to connect my MCU to an old temperature controller whose communication interface is an RS-485 and uses Modbus as its protocol. I want to be able to control that controller remotely using the MCU. Can anyone help me or give me any tips?

    Thanks,
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,566
    2,379
    There are quite a few suppliers of RS485 IC's, TI for one.
    There is quite a bit of information on the Modbus sites for the protocol, including free master or slave simulator programs.
    Max.
     
  3. jean28

    Thread Starter Member

    Sep 5, 2012
    76
    0
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,566
    2,379
    Yes, I have also used a cheap ebay RS232 to RS485 convertor where a RS232 was already in place.
    Max.
     
  5. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    SN75176 is a early model of the basic RS-485 transceiver. There are many newer models now available from various manufacturers.
     
Loading...