RS232/485/422 to optic fiber modem, 9-36VDC The Model277 Series ... 485 serial interfaces andmulti-mode or single- mode fiber. Model277converters are used to extend serial transmission ... mode 20KM, 40KM, 60KM7) Standard Accord RS-48, RS-422 standard 8) RS-485 signal D+, D-, GND 9 ... ) RS-422 signal R+, R-, T+, T-, GND 10) Fiber ... 32:03 Sell RS485/422 Serial Optic Fiber Modem