SR-100-SC20-XT – Fast Ethernet Industrial Media Converter: 100Base-TX (RJ-45) [100 m/328 ft] to 100Base-LX 1310nm single mode (SC) [20 km/12.4 miles], -40F to +167F (-40C to +75C) extended operating temperature support. DIN Rail case, terminal block (Combicon) power connector for external power source