Tripp Lite Keyspan High-Speed USB to Serial Adapter, PC & Mac, USB-A to DB9 RS232 Male, 3 Foot / 0.91 Meter Cable, 3-Year Warranty (USA-19HS)

This Tripp Lite Keyspan USB to Serial Adapter has been a lifesaver for connecting older serial devices to my newer laptop. Setup was quick and easy – plug and play with no issues on both PC and Mac. The build quality is excellent, the 3-foot cable length is perfect, and the connection is stable and consistent. It’s been extremely reliable for data transfers, and I’ve had zero communication errors. Highly recommend this for anyone needing a dependable RS232 to USB solution. Worth every penny, especially with the 3-year warranty included!

KEYSPAN USA-19HS USB to Serial adapter: Summary: I had a device that came with a USB-Serial adapter from FTDI Chip that only worked intermittently, was poorly documented, and the vendor ignored my e-mail. The KEYSPAN USA-19HS worked flawlessly, is well documented, and comes with a powerful utility (which I did not need). Details: Recently I acquired a "Duplimate Mark IV bis" duplicate bridge card dealer. It uses a serial connection to the host Windows computer. I'm using an IBM Thinkpad T40 running Windows XP SP2. The computer has no serial ports, but the Duplimate came with an adapter, as well as a serial cable. That adapter has a captive USP cable, and a DB9-F connector for the serial device (unusually, with screws - no independent serial cable needed). The adapter was identified only by manufacturer, FTDI Chip. It came with a mini-CD, which I explored and used to print out the manual. I eventually deduced that the adapter was an HL-340, which I found stamped on the DB9 connector and as the name of a folder on the mini-CD, but not in the manual. I installed a driver in that folder, and got the dealer to work - kind of. It would actually deal a hand only about half the time, otherwise taking several seconds to report a communications error. By the time I had hit Ctrl-A to restart dealing for the fifth time on a deal, I was wondering what I would do if it refused to deal. FTDI Chip has a web site, and I downloaded a driver from there - no use. I did perform a successful reinstall without using the HL-340 folder directly, with no change in results. A detailed e-mail to FTDI chip produced no response. If you ever have a chance to buy something from FTDI Chip - DON'T! Two days ago, I ordered the KEYSPAN USA-19HS from Amazon for just under $32, with free shipping. It arrived today, and I put it through its paces. It comes with a full-size CD. First, I removed the old driver. When I installed the Keyspan software, which must be done with the adapter disconnected, the driver went right in. (I also took the time to register the product.) A Keyspan USB Serial Adapter folder appeared on my Programs menu, and it contains a powerful and potentially useful Keyspan Serial Assistant - as well as the manual in HTML and PDF. Don't read the manual on CD - it's slow - wait to read it on your computer. The manual is excellent, tho you may not need it. The adapter has a short detachable USB cable, which is probably fine for most applications; but if you need a longer one, you can substitute. Using the serial assistant or Start-Control Panel-System-Hardware-Ports confirmed that the newly connected serial port was COM3. The DB9-M connector has nuts for the screws on a typical serial cable, so it would not mate with the Duplimate, which also has nuts. No problem, I had the serial cable that came with the Duplimate. While using the extra cable is not as convenient, I judge this to be the correct implementation, because it will mate with captive or specialized serial cables. Because my WinDup software was already configured for COM3, I was able to fire it up and start dealing immediately. No more communications errors, no more waiting to hit Ctrl-A if the machine did not start dealing immediately. It always started dealing as soon as I inserted the next board.

I bought a cheap USB-serial cable from eBay and used some free PL2303 drivers that I downloaded. Despite the fact that drivers installed okay and detected the hardware, I only got garbage data from it. So I took a chance and bought this USB-serial cable, since there were so many Mac users extolling its virtues. They are all correct: this cable works great! And it has some of the best Mac support I've seen from a hardware vendor. The cable ships with a CD that has Windows and Mac (OS 9 *and* OS X) drivers and documentation on it. The documentation is great -- it fully describes the installation process, which is very simple actually but there maybe some issues here and there. It also covers using the cable with various popular devices, like a Palm Pilot and Virtual PC. There's even a small application that gets installed that gives you some status info and lets you install the drivers. One caveat is that that you can only install one set of drivers for an OS. So if you install the OS X drivers, you can't also install the OS 9 drivers and use it in Classic mode. You also can't install the Windows drivers if you're running Virtual PC, but there are instructions on how to get around that. The documentation even says that Keyspan doesn't officially support Virtual PC, but they include instructions provided by end-users anyway. I wish every vendor provided that kind of documentation. I know this cable is much more expensive that the cheap-o ones you find elsewhere, but if you're a Mac user, don't waste your time with any other USB-serial cable.

Installed the configuration software, plugged it in, and it worked immediately. I am using it with WinXP Service Pack 2, and it communicates great with a complex serial interface to an unusual piece of electronics I have, so its very compatible with "real" serial ports, unlike some other adapters I have tried that seem to only work with modems or PDA docks. The adapter as shipped is actually a small 1"x1.5"x3" box connected to your computer with a 3' USB cable that can be unplugged from it. It has a green LED on top to tell you when it is properly configured as well as when a program has opened that serial port and when it is passing data. Very functional and easy to use; the configuration software even includes tests to make sure the device is recognized and is properly communicating with your computer. The configuration software also ensures that the same COM port is assigned to the device, no matter which USB port on your computer you plug it into each time, unlike previous adapters I've had which created a different COM port each time you plugged the device into a different USB port (very annoying); the driver also has an option to behave like those other drivers, but most people will probably want to always have it act like the same COM port, the default.

Dado que es el único producto en el mercado que puede dar un puerto serial fiable desde el USB no duden que este es su producto. Lo necesitaba para usar con un equipo que sólo se recomienda este.

Prodotto di qualità superiore alla media. Disponibile anche un piccolo software per gestire la periferica e testare la comuncazione. Arrivato in tempi brevissimi!

Keyspan USB to serial adapter is just the best in the market. It works immediately 100% compatible with windows. I got also one I used with my mac for years. Strongly recommended!

Professionnel de l'informatique, j'ai installé cet adaptateur USB-série chez un client garagiste, en remplacement d'un adaptateur d'une autre marque, pourtant neuf mais qui provoquait des erreurs de communication avec un boîtier de diagnostics automobile GM Tech2. Avec celui-là, aucun souci de communication entre le pc et le boîtier Tech2. C'est d'ailleurs ce modèle qui est préconisé par General Motors.

I got this to upgrade the software on my Celestron Nexstar SE8 Telescope and Starsense finder and it did the trick perfectly. The item supplied by Celestron didn't work and their own website even suggests getting this item. So..... the big question for Celestron is why not include an adaptor that actually works. Hey ho - well worth the expense for a quality item.