Tripp Lite USB to RS232 Serial Adapter Cable USB-A to DB25 DB9 M/M 5-Feet (U209-005-DB25)
Legacy serial equipment still handles essential work on shop floors, server benches, and utility panels. We build this adapter cable to bridge that older hardware directly to modern computers through a standard USB port. The line draws its operating current right from the host connection.
Price as the listing last showed it. Listings move, so the figure on the page you land on is the one that counts at checkout.
- Connect a RS232 serial device to the USB port on your computer
- 5-ft. cable length
- No external power is required
- Supports data transfer rates up to 230 kbps
- Premium double-shielded cable with gold-plated contacts, tinned copper braid and an aluminum Mylar foil shield that eliminates cross-talk and reduces EMI/RFI interference
How this one is built
Bus powered operation
The adapter cable pulls all necessary operating current directly from the computer USB port. That leaves your power strip free and avoids running another wall transformer behind the bench to talk with field equipment.
Connector plating
Gold plating on the contacts resists corrosion from humidity and repeated mating cycles. Signals pass cleanly across the pins each time you hook into a controller, console port, or lab instrument.
Shielded cable jacket
Tinned copper braiding paired with aluminum Mylar foil lines the run beneath the outer jacket. This construction cuts down on electromagnetic and radio frequency noise from surrounding shop gear.
Direct serial bridge
The molded head handles data conversion to maintain steady communication between your operating system and the attached peripheral. It fits standard serial pinouts without requiring an intermediate breakout box.
On the nameplate
These are the figures published for this unit. Where a number is missing here it was not printed on the listing, and we would rather leave the row out than fill it with a guess.
| Connector | Coaxial |
|---|---|
| Color | Black |
| Weight | 5.28 ounces |
| Warranty | 2 year limited warranty |
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