Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
1 773.869.1774
1 773.869.1329

RS232 to USB Adapter Cable with COM Retention (USB-A to DB9 M/M), FTDI, 5 ft.

RS232 to USB adapter cable with DB9 serial connector lets you connect RS232 devices to your computer’s USB port.
  • Supports data transfer speeds up to 230 Kbps—double the speed of a built-in serial port
  • Automatically reassigns COM values to each port to avoid additional configuration
  • USB-powered, so no bulky or obtrusive external power supply is required
  • Double shielding protects against EMI/RFI line noise that can distort or destroy data
  • Compatible with Windows, Mac and Linux—works with most computers
  • 3-year limited warranty

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Connects a Barcode Scanner or Other DTE Serial Device to Your Computer’s USB-A Port
This five-foot serial RS232 to USB adapter cable turns your computer’s USB port into an RS232 serial port and avoids the expense of upgrading your reliable serial devices. No external power source is needed. Just connect the cable to your computer and insert the included CD into your computer’s CD drive in order to launch the driver and assign the cable a COM port. It supports USB 2.0 specifications and data transfer speeds up to 230 Kbps, which is almost twice as fast as a built-in serial port. It is backward compatible with USB 1.1 devices.
COM Retention Feature for Convenient Reassigning of COM Values to Ports
The hot-swappable RS232-port-to-USB adapter with built-in FTDI chipset offers COM retention. It automatically reassigns the same COM port values to each port, so when the cable is disconnected or the system is rebooted, no additional configuration is needed. The cable also supports remote wake-up and power management.
Double Shielding Protects Your Data from Destructive Line Noise
Foil and braid shielding helps fight against electromagnetic interference and radio frequency interference (EMI/RFI) that impedes your signal and can distort or destroy data. The auto-sensing feature solves DCE/DTE conflicts without the need for cross-wired serial cables or adapters.
3-Year Warranty
The U209-005-COM is backed by a 3-year warranty, ensuring reliability and performance.

Typical Applications

  • Connect and control serial-based point-of-sale printers, barcode readers, surveillance cameras and card readers
  • Create messages for LED sign boards with serial ports to avoid the expense of upgrading your sign board

Package Includes

  • U209-005-COM RS232 to USB Adapter Cable, 5 ft.
  • Driver CD
  • Owner’s manual

System Requirements

  • Windows, Mac or Linux
  • Computer with an available USB port
RoHS compliant


UPC Code037332210227
Cable Length (ft.)5
Cable Length (in.)60
Bus Powered  Yes
Cable Length (cm)152
Cable Jacket RatingVW-1
Material of ConstructionPCB & PVC
Unit Packaging TypeBox
Unit Weight (lbs.)0.15
Operating Temperature Range32 to 140 F (0 to 60 C)
Storage Temperature Range-4 to 176 F ( -20 to 80 C)
Relative Humidity0% to 80% RH, Non-Condensing
Side A - Connector 1USB A (MALE)
Side B - Connector 1DB9 (MALE)
Connector PlatingNickel
Contact Plating  Gold
USB SpecificationUSB 2.0 (up to 480 Mbps)
Driver RequiredYes
Remote Wakeup SupportYes
TechnologySerial (RS232); USB
CertificationsTested to CE, FCC, RoHS, REACH, WEEE
Product Warranty Period (Worldwide)3-year limited warranty

Frequently Asked Questions

COM retention allows the same COM port number to be automatically assigned each time the serial adapter is connected to a USB port on your system (or your system is rebooted). Without COM Retention, you would have to remember which port to connect the adapter.

Additional FAQs may be available on the U209005COM model support page.


USB, Lightning & FireWire
  Model Number Description
U026-016 | USB, Lightning & FireWire U026-016 USB 2.0 Active Extension Cable (A M/F), 16 ft.
U026-025 | USB, Lightning & FireWire U026-025 USB 2.0 Active Extension Cable (USB-A M/F), 25 ft. (7.6 m)
U026-15M | USB, Lightning & FireWire U026-15M USB 2.0 Active Extension Repeater Cable (USB-A M/F), 15 m (49 ft.)
U026-20M | USB, Lightning & FireWire U026-20M USB 2.0 Active Extension Repeater Cable (A-A M/F), 20M (65 ft.)
U223-007 | USB, Lightning & FireWire U223-007 7-Port USB 2.0 Hub
USB Cables
  Model Number Description
U026-20M | USB Cables U026-20M USB 2.0 Active Extension Repeater Cable (A-A M/F), 20M (65 ft.)
U026-15M | USB Cables U026-15M USB 2.0 Active Extension Repeater Cable (USB-A M/F), 15 m (49 ft.)
U026-025 | USB Cables U026-025 USB 2.0 Active Extension Cable (USB-A M/F), 25 ft. (7.6 m)
U026-016 | USB Cables U026-016 USB 2.0 Active Extension Cable (A M/F), 16 ft.

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(773) 869-1774

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(773) 869-1234

Tripp Lite
1111 West 35th Street
Chicago, Illinois 60609
United States

1 773.869.1111 Main
1 773.869.1329 Fax

Business Hours
8 AM - 5:30 PM CST

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Need help with your purchase?
We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at 1 773.869.1774 or email