... , 1M, 5M, 10M);Protection: RS422/485 with 600W sursge protection also has overload protection function. ... No.DescriptionunitCi-sf110-MMultimode fiber 2KM, one fiber port, connector ST/SC/FC (optional), Rate data ... mode fiber, transmission distance: 20KM, single fiber port, connector ST/SC/FC (optional), Rate data: ... Pcs Rs232/485/422 to Fiber Optic Converter with two optical ports support daisy chain link ...