ABB Relion 670 series - Page 895

LinkForwarded is used to configure the LDCM to merge the inter-trip and block signals
from another LDCM-receiver. This is used when the analog signals for the LDCM-
transmitter is connected to the receiver of another LDCM.
1MRK 506 369-UUS - Section 22
Remote communication
Line distance protection REL670 2.2 ANSI 889
Application manual