USB to 4 ports RS485 converter, easy to use, Windows7/8/Vista, Linux. A quick ... powered from USB or 5VDC external power input5. No IRQ, I/O Address6. Support USB2.0, baud rate can reach ... mode: Asynchronous, point to point, 2 wires half duplex, 4 wires full duplex Transmission: 1200mInterface protection: 1500W surge protection,15KV ... Date:2012-04-24 04:59:54 USB to 4 Port RS485/422 Converter-USB4485