... Repeater Fiber Optic to RS232 to RS485, Optic fiber devices, RS-485 Repeater, Series Multi-drop Optic Fibres, Serial Converters for Industrial Control ... /422/485 interface:RS232 speed: 0-115200bps;RS232 support for RXD, TXD, GND 3-line approach to work;RS422 support for RX-, ... 0-2M (optional 500K, 1M, 5M, 10M);Protection: RS422/485 with 600W sursge protection also has overload protection function. ...