... distance: MM 2Km, SM 20Km Fiber interface type: ST/SC/FC (optional); ST (standard configuration) Relay Contact rating:DC30V@1A Max Fiber ... No.DescriptionunitCi-pf110-MMultimode fiber 2KM, one fiber port, connector ST/SC/FC, Rate data: 0~12M.PcsCi-pf120-MMultimode ... SSingle mode fiber, dual fiber ports, transmission distance 20KM, connector ST/SC/FC, Rate data: 0~12M.Pcs Interface Converter electrical ...