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!

No complaints--this adapter does what it says it'll do. As an experiment, I wanted to see if I could load software for an old Palm Pilot and sync in Windows 11. The sync cradle is RS232 (serial) so I needed an adapter. The Tripp Lite was completely plug 'n' play and was working in a few minutes. Only very minor complaint is I haven't yet found a way to adjust RS232 settings (such as baud rate) in Device Manager. I haven't done exhaustive research into that (it works great for my setup so I haven't needed to). I like that the adapter has an LED--indicates when it's connected, when it's transmitting data, etc. Nice.

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 purchased this cable for work to configure routers and other devices via serial port. Works well in conjunction with the Cisco blue serial cable. The cable assembly is of good quality and consists of two parts, the USB to serial adapter, and a standard USB A to B cable. This design is quite nice as you can unplug the adapter from the cable for compact storage/transport without having to bend the cable at the adapter to cable interface. In addition, you can replace the USB cable with a longer one if necessary. This two part design is probably why this cable costs a bit more than some of the other cables. The cable also has a non-obtrusive green LED which blinks when it is idle, and is solid when there is communication. I've used this cable on both Linux and Windows XP (it also comes for drivers for Mac OS X 10.2.8 or greater and MacOS 8.6-9.x). This adapter is plug-and-play support for Linux (Fedora Core 6) without needing to install any drivers! This is a major plus in my book. Once you plug it in, the serial port is available as /dev/ttyUSB0 (type 'dmesg' after you plug it in to see what device file it is associated with). I also got it working relatively easily with Windows XP by first installing the driver from CD, then plugging the device into the USB port. After installing the driver, Windows XP menus became a bit erratic (transparent when I clicked on the menu and I was unable to see the menu items), so I did a reboot and it worked fine after that. I don't know if this is related to the driver installation but it is the first time I ever saw this behavior. In Hyperterminal, The adapter showed up as COM5. You can figure out the COM port to use by launching the device manager (right click on "My Computer" ->Properties ->Hardware tab -> Device Manager). Go down to Ports (COM & LPT), and Keyspan USB Serial Port should have the com port in parenthesis (COM5 in my case). This adapter was well worth the price and it shipped for free on Amazon.

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.