USB485 Series

1-port USB to RS-485 Converter


 Supports bilateral switching of data between 1 USB interface and 1 RS-485/422 serial port

 USB end power supply, without external power supply

 Autotunning of serial port signal rate

 Supports 600W surge protection, 15KV electrostatic protection

 Supports -20~60℃ wide temperature operation

 Compact size, easy installation

USB485 series are passive pocket USB to RS-485/422 interface converter, which can achieve bilateral switching of data between USB interface and RS-485/422 serial port without external power supply. This series include 2 optional products and provide 1 USB interface, 1 RS-485 or 1 RS-485/422 serial port. Interface is equipped with 600W surge protection and 15kV electrostatic protection, which can effectively protect the device from damage.


The product provides matched driver program software; USB interface connected to PC will make up a serial COM port in the computer system. PC host can communicate with RS-485/422 device via virtual COM port.


USB485 series have compact size and are easy for installation. Specific LED indicator is convenient for judging signal conversion. It can be widely used in industrial control automation system, bar-code scanner, PLC and PLD, PDA (WinCE system), label printer, POS system, data acquisition control system, security access control system, etc.

Serial Port


Standard: EIA RS-485, RS-422

Quantity of serial port: 1 RS-485 serial port or RS-485/422 serial port

RS-485 signal: D+, D-, GND

RS-422 signal: T+, T-, GND, R+, R-

Baud rate: 300bps~115200bps

Interface form: adopt DB9 Male or 5-pin 5.08mm pitch terminal blocks

Transmission distance: 1800m

Direction control: RS-485 direction adopts ADDC (Automatic Data Direction Control) 

Load capacity: RS-485 supports 32-point polling environment (customizable 128-point)

Interface protection: 600W surge protection, 15kV electrostatic protection


USB Port

Standard: USB 1.1, USB 2.0, USB CDC V1.1

Quantity of interfaces: 1 USB interface

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

Transmission rate: high speed 480Mbps, full speed 12Mbps

Interface form: USB A-type plug, Female

Transmission distance: 5m

Operating System

Windows 98/ME/2000/XP/7, Linux v5.0






USB interface power supply, without external power supply





Static power consumption: ≤80mA

Dynamic power consumption (mean value): ≤150mA





Operating temperature: -20~60℃

Storage temperature: -25~85℃

Relative humidity: 5%~95% (no condensation)





Housing: plastic

Dimension (W x H x D): 33mm×18mm×72mm (cable length 1.5m)

Weight: 70g








3 years





Available Models USB RS-485 RS-485/422 Power Supply
USB485B 1 -


USB485C  1  1