Tripp Lite U209-006-2

Overview

The Tripp Lite U209-006-2 is a two-port USB to DB9 serial adapter cable designed to connect legacy RS-232 devices to modern computers that only have USB A ports. It converts a single USB connection into two independent serial COM ports, supporting data transfer speeds up to 225 Kbps. This makes it ideal for maintaining compatibility with modems, point of sale terminals, label printers, and industrial controllers without needing additional hardware.

Equipped with an FTDI FT232RL chipset, the cable ensures smooth protocol conversion and broad compatibility across Windows, macOS, and Linux systems. Its COM retention feature preserves port assignments after reboots or reconnections, preventing software confusion and streamlining device management.

Key features

• Converts one USB A port into two DB9 RS-232 serial ports, expanding connectivity options for legacy equipment
• Supports data rates up to 225 Kbps, providing faster communication than traditional onboard serial ports
• Powered directly from the USB bus, eliminating the need for an external power adapter
• Six-foot cable length offers flexibility to position devices comfortably on a bench or inside a rack
• FTDI FT232RL chipset ensures reliable operation and driver support across multiple operating systems
• COM retention feature automatically restores original port numbers after unplugging or rebooting, maintaining consistent device recognition
• Foil and braid shielding reduces electromagnetic and radio frequency interference, preserving signal quality in noisy environments
• Compatible with Windows, macOS, and Linux, making it suitable for diverse IT setups and projects

Key specs

• Ports: 2 x DB9 serial (male) to 1 x USB A (male)
• Cable length: 6 feet (1.83 meters)
• Data transfer rate: up to 225 Kbps
• Chipset: FTDI FT232RL
• Power source: USB bus powered, no external adapter required
• Shielding: foil and braid for EMI and RFI protection
• Operating system compatibility: Windows, macOS, Linux

Connectivity and compatibility

This adapter cable bridges the gap between modern USB-only computers and older serial devices that rely on DB9 RS-232 connections. It works seamlessly with a wide range of equipment including modems, industrial controllers, label printers, and point of sale terminals. The FTDI chipset ensures that drivers are readily available and stable across major operating systems, simplifying integration into existing setups.

• USB A male connector plugs into the host computer
• Two DB9 male connectors connect to serial devices
• Supports COM port retention to maintain consistent device mapping

Ideal uses and environments

This cable is well suited for engineers, IT administrators, and hobbyists who need to connect legacy serial devices to modern computers without serial ports. Its shielding and reliable data rates make it a strong choice for use in office environments, labs, server rooms, and factory floors where electromagnetic interference can be a concern. The six-foot length provides enough reach for flexible device placement while keeping the host computer accessible.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

Learn more

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more