With the continuous development of PC industry, USB interface is gradually replacing various low-speed peripheral interfaces of old PC, however, many important devices in industrial environment still use RS-232/485/422 interface design, so many users use USB to RS-232/485/422 converter to achieve PC and RS-232/485/422 devices data transfer between PC and RS-232/485/422 devices. The UT-8890 is a universal USB/RS-232/485/422 converter with no external power supply, zero latency automatic transceiver conversion, unique I/O circuitry to automatically control the direction of data flow, and plug-and-play operation. It is suitable for all existing communication software and interface hardware. UT-8890 interface converter can be point to point, data communication rate 300-921600bps, with power indicator and data flow indicator can indicate the failure situation, support the communication mode of USB to RS-232/485/422 conversion. ● Support USB to RS-232/485/422 converter ● Standard: Compliant with USBV.1, 1.0, 2.0 standard and ELA RS-485, RS-422S standard ● Working mode: 232 full duplex, asynchronous work, point-to-point or multi-point, 2-port half duplex, 4-port full duplex ● Direction control: Data flow direction automatic control technology, automatic control of data transmission direction ● Baud rate: 300-921.6Kbps, automatic detection of serial signal rate ● Load capacity: support point to multi-point, each converter can allow the connection of 256 RS-422 or RS-485 interface devices