... changed, the signal will still be transmitted through the RS-422/485 to fiber converter without any problem. Features1.Auto sense serial ... , 40KM, 60KMCommunication Standard Accord RS-485, RS-422 standard RS-485 signalD+, D-, GNDRS-422 signalR+, R-, T+, T-, GND Fiber signalIN, OUT Working formatAsynchronism, ... Color WhiteWeight230gUpdate Date:2012-04-24 04:34:16 RS485/422 serial optic fiber modem