Figure 72: Lc Connectors; Figure 73: Communication Module With Single Ethernet Connector - ABB UniGear Series Engineering Manual

Fiber Optics Connector
Relion ® protection relays are equipped with Small Form Factor connectors, type LC. The inno-
vative LC design offers a form factor one-half the size of current industry standards.

Figure 72: LC connectors

Ethernet rear connections of protection relays
The Ethernet communication module is provided with either galvanic RJ-45 connection or op-
tical multimode LC type connection, depending on the product variant and the selected com-
munication interface option.

Figure 73: Communication module with single Ethernet connector

Communication modules with multiple Ethernet connectors enable the forwarding of Ether-
net traffic. These variants include an internal Ethernet switch that handles the Ethernet
traffic. All Ethernet ports share this one common MAC table Ethernet ports marked with LAN
A and LAN B are used with redundant Ethernet protocols HSR and PRP. The third port without
the LAN A or LAN B label is an interlink port which is used as a redundancy box connector
with redundant Ethernet protocols.
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