RS485 to optic fiber converter, easy to installation, plug and play, SC,FC, ST ... RS-422/485 serial interfaces andmulti-mode or single- mode fiber. Model277/B converters are used to extend serial transmission ... signalD+, D-, GNDRS-422 signalR+, R-, T+, T-, GND Fiber signalIN, OUT Working formatAsynchronism, point to point or multi-pointDirection ... :2012-04-24 04:34:16 RS485/422 serial optic fiber modem