Siemens 7SR18 Solkor - Protection Signalling Communication Connection; Additional (Optional) Ethernet Connection for IEC 61850

7SR18 Installation Guide
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6.2 Protection Signalling Communication Connection
The connections between Local and Remote relays must be connected in a cross-over manner e.g. Tx
on Local relay to RX on Remote relay, or top connection on Local relay to bottom connection on
Remote relay.
6.3 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 µm glass fibre with Duplex-LC connector recommended for all
distances.
To
Control
System
Switch
Ch n
Ch 2
Ch 1
62.5/125 µm fibre optic
with Duplex LC
connectors or RJ45
electrical connectors
Ch 2
Ch 1
Ch 1
Ch 3
Ch 2
Ch 1
Input
Ch 2
Figure 6.3-1 Ethernet connection for IEC 61850 (star connection)
Figure 6.3-2 Ethernet connection for IEC 61850 (ring connection)