Serial RS232/485/422 to fiber converter, easy to installation, plug and play, termianl blcok connection, LED indicator,Optical RS232/485/422 to Optical fiber fiber converter, easy to installation, plug and play, termianl blcok connection, LED indicator The Model277 Series converter is equipped with a multiple interface circuit that can handle RS-232, or RS-422/485 serial interfaces andmulti-mode ...