7SR21 & 7SR22 - Installation Guide
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6.6 Additional (Optional) Ethernet Connection for IEC 61850
Rear Ethernet Comms port Ch 1 and Ch 2 comprises Duplex LC 100BaseF in acc. With IEEE802.3 Fibre–
Optic or RJ45 100BaseF in acc. With IEEE802.3 electrical connectors.
When installing fibre, ensure that the fibres’ bend radii comply with the recommended minimum for the fibre used-
typically 50 mm is acceptable, 62.5/125 mm glass fibre with Duplex-LC connector recommended for all
distances.
Figure 6.6-1 Ethernet connection for IEC 61850 (star connection)
Figure 6.6-2 Ethernet connection for IEC 61850 (ring connection)
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