ABB Relion 670 series - Page 33

The connection between the IED and PCM600 is established via an Ethernet link
on the front or rear port on the IED.
The IP addresses of the different ports on the IED are not allowed
to belong to the same subnet.
1MRK 511 398-UEN C Section 2
Engineering tool set
670 series 2.2 IEC 27
Engineering manual