... 2Km, SM 20Km Fiber interface type: ST/SC/FC (optional); ST (standard configuration) Relay Contact rating: ... 2KM, dual fiber ports, connector ST/SC/FC, Rate data: 0~12M.PcsCi-pf110-SSingle mode ... distance: 20KM, single fiber port, connector ST/SC/FC, Rate data: 0~12M.PcsCi-pf120-SSingle mode ... fiber ports, transmission distance 20KM, connector ST/SC/FC, Rate data: 0~12M.Pcs Industrial Control Fieldbus ...