... RS232 to RS485, Optic fiber devices, RS-485 Repeater, Series Multi-drop Optic Fibres, Serial Converters for Industrial Control Interface P ... Termination: None.Optical interface Wave length: 850nm,1310 nm,1550nmFiber type: multi mode 50/125 um,62.5/125 um,100/140um ... ,9/125um,10/125umTransmission distance: MM 2Km,SM 20KmFiber interface type: ST/SC/FC Optional, ST Standard. RelayContact rating:DC30V@1A ...