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Product name:

UOTEK USB to RS-232/485/422 converter

Model: UT-8890

● 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


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.


● Standard: Compliant with USBV.1, 1.0, 2.0 standard and ELA RS-485, RS-422S standard

● USB signal: VCC, DATA+, DATA-, GND, FG

● RS-232 signals: RXD, TXD, DTR, DSR, RTS, CTS

● RS-485 signals: T/R+, T/R-, GND

● RS-422 signal: T/R+, T/R-, RXD+, RXD-, GND

● 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

● Transmission distance: RS-232 end 5 meters, USB port no more than 5 meters; RS-485/422 end 1200 meters (9600bps when), USB port no more than 5 meters

● Interface protection: Surge protection, ±15KV electrostatic protection

● Interface form: USB end of the Class A interface male, DB9 male connector connection

● Signal approval: 2 signal approval lights send (TXD) or (RXD) 1 power indicator (POWER)

● Transmission medium: twisted pair or shielded wire

● Dimensions: 1500mm*36mm*16mm (L*W*H)

● Operating temperature: -40 ~ 85°C

● Relative humidity: 5 ~ 95%

● Transmission distance: 0-1200m (485/422)

● Support WinXP/7/8/8.1/10 etc.