We don't have the FMC daughter card that allows communication between RS232/RS485 from Intel.
You may get it from other vendors/providers.
Anyway in my view
So, We can get HSMC daughter card that allows communication between RS232/RS485 and a adapter (FMC -HSMC).
i.e use adapter(FMC to HSMC) and HSMC daughter card that allows serial communication with FPGA.
We are not promoting any vendor or Distributor.
Let me know if this has helped resolve the issue you are facing or if you need any further assistance.
Anand Raj Shankar
(This message was posted on behalf of Intel Corporation)