SMAKN 5-Wires Rs-232 Optical Isolator Port: Compliant to RS232 EIA and CCITT V.24 Transmission modes: Asynchronous, Dual duplexes Full transparent Isolated voltage: 2500 in constancy, 7500V in surge. Baud rate: 0 ~57.6kps Pawer source: Self powered fiom TXD, RTS, DTR