StarTech.com 6ft RS422 RS485 USB to Serial Cable Adapter with COM Retention

StarTech.com ICUSB422

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Manufacturer Part#  ICUSB422

UPC Code: 065030836548

Provantage Code:  STR91AY

Condition:  Factory New

  • Product Type: Data Transfer Adapter
  • Country of Origin: Taiwan
  • Limited Warranty: 2 Year
  • Connector on First End Details: 9-pin DB-9 RS-422 Serial - Male
  • Connector on Second End Details: USB 1.1 Type A - Female
  • TAA Compliant: Yes

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StarTech.com ICUSB422 Specifications

    6ft RS422 RS485 USB to Serial Cable Adapter with COM Retention

At a Glance

    • USB to Straight-Through RS422/485 Serial Adapter
    • Supported baud rates from 300bps to 921.6 Kbps
    • Being able to rename devices no matter how many are plugged in
    • Supports COM Port retention
    • Configurable port for RS422 or RS485 support
    • Supports RS-485 Auto Transceiver Turn Around by Unique Featured ATTA Hardware
    • Backwards compatible with USB 1.1
    • Integrated adapter and cable eliminates the need for additional cables
    • Two interface modes; 4 wire RS422(TxD+/-, RxD+/-), and 2 wire RS485 (DATA+, DATA-)
    • 120 OHM terminator that can be Enabled/Disabled by DIP switch


    The ICUSB422 6ft Professional RS422/485 USB Serial Cable Adapter with COM Port Retention lets you connect RS422 or RS485 serial devices to your USB-enabled computer. The adapter features a 9-pin (DB9) male serial connector as well as dipswitch controls for easy port configuration, and requires minimal software.

    The serial adapter is USB-powered, eliminating the aggravation of requiring an external power adapter. With COM port retention, assigned port settings are saved, so you can disconnect and reconnect the adapter with virtually no configuration required on the host computer.

    The ICUSB422 is backed by a StarTech.com 2-year warranty and free lifetime technical support.

    More from the Manufacturer


    Operating System(s):

    • Windows 8 / 7 / Vista / XP (32/64-bit)
    • Windows 2000
    • Windows CE (4.2+)
    • Windows Server 2008 R2
    • Windows Server 2003 (32/64-bit)
    • Mac OS v.9.x, v.10.x (Tested up to v.10.8)
    • Linux

Package Contents

    • 6ft RS422/485 USB Serial Adapter with COM Retention
    • 1 x Driver CD
    • 1 x Instruction Manual

Additional Product Images


Product Name6ft RS422 RS485 USB to Serial Cable Adapter with COM Retention
Manufacturer Part NumberICUSB422
Product TypeData Transfer Adapter
Connector Type on First EndDB-9 RS-422 Serial - Male
Connector Type on Second EndUSB 1.1 Type A - Female
TAA CompliantYes
Product ColorBlack
Packaged Quantity1
Environmentally FriendlyYes
Connector on First End Details1 x 9-pin DB-9 RS-422 Serial - Male
Connector on Second End Details1 x USB 1.1 Type A - Female
Country of OriginTaiwan
Limited Warranty2 Year
Operating System CompatibilityWindows CE 4.2

Windows CE 5.0

Windows CE 6.0

Windows XP Embedded

Windows 98 Second Edition

Windows 2000 Server

Windows XP

Windows Vista

Windows 7

Windows 8

Windows 8.1

Windows 10

Windows 11

Windows Server 2003

Windows Server 2008 R2

Windows Server 2012

Windows Server 2012 R2

Windows Server 2016

Windows Server 2019

Windows Server 2022

Mac OS X 10.6 Snow Leopard

macOS Catalina 10.15

macOS Big Sur 11.0

macOS Monterey 12.0

macOS Ventura 13.0

Linux Kernel 3.0.x+ LTS

Connector Gender on First EndMale
Connector Gender on Second EndFemale
Cable Length6 ft
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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StarTech.com ICUSB422