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USB to 4-Port DB9 Serial RS232 Adapter


Product Features

Convert four DB9 serial devices to USB; great for PDAs and digital cameras!
• Perfect for connecting DB9 devices to a PC without serial ports
• Connect up to four DB9 devices to a PC using a single USB port
• Plug and play with no additional power required

(1) USB-A Male

(4) DB9 Male

Product Description

An external plug-and-play solution to add up to four RS-232 serial devices to a USB-enabled computer. Use for cellphones, PDAs, digital cameras, modems, or ISDN terminal adapters through your USB ports. Many newer computers, particularly laptop computers and handheld devices, no longer include the legacy serial ports, and desktop computers have reduced the number of serial ports supported. Users with serial devices may find themselves unable to communicate with installed equipment.

This adapter is a great solution to connect those legacy devices to a new computer. The four DB9 serial ports ensure you'll have the connections you need, when you need them. It can be conveniently powered by the external power adapter (included) or by USB bus power without the need for an external power supply. Energy-saving USB suspend-and-resume features are supported. Gives you additonal RS-232 ports while it frees your RS-232 port for other uses.
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TAA Compliant

Product Specifications

Color : Silver
UPC : 757120264798
Warranty : 1 Year
Vendor : C2G
Weight : 1.130 LB
• USB 1.1 compliant
• Supports automatic handshake mode
• Data transfer speed: 12/1.5 Mbps
• Supports remote wakeup and power management
• Power Mode: Bus-powered or external power adapter cable (1.8m length)
• Aluminum housing provides a robust solution
• FTDI chip set
• Windows 8 compliant

System Requirements

• IBM®-compatible PC running Windows® 98SE, ME®, 2000, XP, Vista, Windows 7 or Windows10, Mac® OS 8.6 or higher, or Linux
An available USB port either from the system or a USB hub

Package Contents

• One USB to 4-port DB9 serial adapter
• One 6ft USB A/B cable
• External power supply
• User manual

Product Support

Customer Reviews


by PowerReviews
C2GUSB to 4-Port DB9 Serial Adapter

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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Works great! Used to run 3 CNC's.

By Joe

from Niagara, WI

About Me High bandwidth user

Verified Buyer


  • Easily Expanded
  • Easy To Set Up
  • Fast
  • Reliable
  • Small


    Best Uses

      Comments about USB to 4-Port DB9 Serial Adapter:

      Only one I could find with 4 ports.

      • Primary use:
      • Business
      • Computer Platform:
      • PC

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      Questions & Answers About This Product

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      3 Questions | 3 Answers
      Displaying questions 1-3
      • USB to 4-Port DB9 Serial Adapter


        Is this product supported compatible with server 2008?
        Asked on 7/30/2013 by Anonymous

        1 answer



          Yes, this is compatible with Windows Server 2008.

          Answered on 7/30/2013 by Steve from C2G
      • USB to 4-Port DB9 Serial Adapter


        Is this an FTDI chip
        Asked on 11/8/2012 by Greg from OHIO

        1 answer



          That is correct. The adapter uses a FTDI chipset.

          Answered on 11/8/2012 by Steve from C2G
      • USB to 4-Port DB9 Serial Adapter


        What is the voltage range of the power supply?
        Asked on 11/2/2012 by Marty from Suffolk, VA

        1 answer



          The input voltage is 100-240V.

          Answered on 11/6/2012 by Steve from C2G
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