Flexy Profibus


I was trying to connect our Flexy to a Siemens S7-300 via the serial port through a profibus cable and while trying to follow the direction on the eWon site found that the Flexy we have doesn’t work with profibus. Is there a different card we need to do this?

Question on behalf of customer in Portland Or.



You will either need to use a Flexy 203 which has an MPI port onboard, or use a Flexy 205 in conjunction with the MPI extension card, FLC3701. Please note, this extension card only works on the 205.

Please see page 26 of this manual for more information on setting up communications utilizing MPI/Profibus:


The document you provided was a great help to me. I been searching for 2 days. So thanks!


That is an older document. Do you have any questions?


A detailed document about security while using flexy will be much appreciated. And thanks for your fast reply.


This document is applicable to the Flexy and Cosy platforms and goes into detail about how it works and why it is secure:

White_paper_Talk2M Architecture_v3.0.pdf (1.3 MB)

Please let me know if you have any questions.