SEL's 24-Port Ethernet Switch for Harsh Environments, SEL-2739M
SEL-2730M supports high-speed control, real-time automation and SCADA traffic. It withstands vibration, electrical surges, fast transients, electrostatic discharge and extreme temperatures (-40 °C to +85 °C). It meets or exceeds IEEE 1613 (Class 2) and IEC 61850-3 communications standards. The base-model has 20 copper Ethernet ports—16 are 10/100 Mbps and 4 are Gigabit Ethernet. You can upgrade the 10/100 Mbps drop ports to fiberoptic interfaces and add up to 4 additional Gigabit Ethernet ports.