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The SEL-2725 is an unmanaged, Ethernet edge switch and media converter, with four wired ports and one fibre-optic port. Apply the SEL-2725 to build reliable, safe Ethernet networks in electrical substations, generating plants, industrial plants, and other mission-critical sites. Connect the Ethernet ports of up to four devices in the same cabinet or panel to an SEL-2725, using Category 5 shielded, twisted-pair (STP) cable. Use the fibre-optic port with fibre-optic cable to safely link the SEL-2725 to a station Ethernet network.