Quick question,

I know about CanBus protocol. I'm interesting about ISOBUS and CanOpen. I know that those are exentsion of the CanBus protocol. So my question is:

  1. Do ISOBUS and CanOpen need different hardware?
  2. Do ISOBUS and CanOpen can operate on an existing CanBus network?
  3. Do the changes for those protocol is on the software layer or is it on the chip/hardware layer?


  • 1
    \$\begingroup\$ What sites have you googled for this information? \$\endgroup\$
    – Andy aka
    Commented Jan 26, 2020 at 15:34
  • \$\begingroup\$ many, itis not clear if there is need for extra hardware components or not \$\endgroup\$
    – oak
    Commented Jan 26, 2020 at 16:05
  • \$\begingroup\$ "CanBus" is a hardware and data link layer standard, it is not a protocol. \$\endgroup\$
    – Lundin
    Commented Jan 28, 2020 at 9:50

1 Answer 1

  1. No, both are ISO 11898.

  2. No. ISOBUS is a derivative of J1939. But I do not own the documents of ISOBUS.
    CANopen is unique above the data link layer, it basically eliminates the option to have multiple protocols on one bus. Most of them don't allow this actually. But ISOBUS and J1939 are compatible because they are designed to be.

  3. Since both use CAN bus physical and data link layer, you only need software and maybe a different connector type.

If you are going to work with ISOBUS you should buy the standard!


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