... SpecificationElectrical interfaceRS232/422/485 interface:RS232 speed: 0-115200bps;RS232 support for RXD, TXD, GND 3-line approach to work;RS422 ... No.DescriptionunitCi-sf110-MMultimode fiber 2KM, one fiber port, connector ST/SC/FC (optional), Rate data: 0-10M.PcsCi-sf120- ... mode fiber, transmission distance: 20KM, single fiber port, connector ST/SC/FC (optional), Rate data: 0-10M.PcsCi-sf120-SSingle ...