IRC5 and PLC Siemens


I would like to communicate a PLC S7-1200 or 1500 with a IRB120.
The IRC5 has a Ethernet/IP board, so it's supposed that It's not possible.
People said to me that that board is suitable to communicate with AB PLCs, but not Siemens, and I need a Profinet board.
Is that totally true?
Do I need the profinet board to do it?
Is there any other option?

Thanks in advance