UTEK UT-203 Port-powered, RS-232 to RS-485/422, Mini-size Mini-size RS232 DB9 female port to RS485 RS422 DB9 male connector Hot-swappable and plug & play, port-powered over RS232 RS485 RS422 Unique serial charge pump drive technology, TXD/RXD/GND communication The range of baud rate: 300bps-115.2Kbps Working Mode: asynchronous half-duplex (RS485) or full-duplex (RS422)