... -sf110-SSingle mode fiber, transmission distance: 20KM, single fiber port, connector ST/SC/FC (optional), Rate data: 0-10M.PcsCi-sf120-SSingle mode fiber, dual fiber ports, transmission ... distance 20KM, connector ST/SC/FC, Rate data: 0-10M.Pcs Industrial Interface Converter Rs232/485/422 to Fiber Optic Repeater for fieldbus ...