Keyspan High Speed USB to Serial Adapter

Type A Male, DB-9 Male - View Complete Details

Product Number: SYNX2171002

4.3 star rating4.359 reviews|Read All Reviews|Write a Review

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Estimated Delivery - 5 business day(s) - Wed 12/14 6 business days - Thu 12/15

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Keyspan High Speed USB to Serial Adapter - Looking for a way to connect your serial devices to a USB port on your PC? The Keyspan "High Speed" USB Serial Adapter is a simple, inexpensive, and reliable way to make this connection.
The Adapter is ideal for use with modems, digital cameras, ISDN terminal adapters, graphics tablets, PDAs, bar code scanners, label printers and other serial devices which require an RS-232 connection.
This "High Speed" USB Serial Adapter supports data rates up to 230 Kbps---twice the speed of a standard PC serial port. It is 100% USB compliant and features simple "Plug and Play" installation (no IRQs). Ideal for laptops (it weighs just 2 oz.), the Adapter draws its power from the USB connection so no power adapter is required.

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REVIEW SNAPSHOT®

by PowerReviews
Keyspan High Speed USB to Serial Adapter
 
4.3

(based on 59 reviews)

Ratings Distribution

  • 5 Stars

     

    (43)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (2)

  • 1 Stars

     

    (6)

86%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

works on Mac OS-X 10.6, XP etc.

On my MacBookPro with VMware Fusion, the device is working on both OS-X (native) and XP (VMware).
On the Mac, you have to figure out with the serial assistant how...Read complete review

On my MacBookPro with VMware Fusion, the device is working on both OS-X (native) and XP (VMware).
On the Mac, you have to figure out with the serial assistant how to name the port.
Next I worked smooth with SecureCRT.
Then I upgraded to OS-X 10.7, waiting for the driver now...

VS

Most Liked Negative Review

 

USA-19HS issues, unstable with USB 3.0, hard lockup on resume from standby

The USA-19HS adapter and/or its driver causes following issues when computer resumes from S3 standby or sleep mode:

1. In case adapter is attached to USB 3.0 port,...Read complete review

The USA-19HS adapter and/or its driver causes following issues when computer resumes from S3 standby or sleep mode:

1. In case adapter is attached to USB 3.0 port, whether COM port is idle or open, the PC locks up while attempting to resume from standby (the lights turn on, fans start to turn, but there is no video/display). Reboot with reset button or power cycle is required.

2. In case adapter is attached to standard USB 2.0 or USB 1.1 port, the application that had COM port open at the time PC transitioned to sleep mode loses the connection to the port on system resume. The port must be re-opened within application after resume.

The issue with USB 3.0 comes up when using PC with Intel integrated USB 3.0 controller. I have also seen it with Asmedia USB 3.0 controllers, but they have problems of their own. Intel however is stable with everything else I have. Since IntelÕs USB 3.0 controller is present on every new PC, I thought it might be good idea to report the issue. I hope it is going to be resolved in the next USA-19HS driver update.

The only USB 3.0 host controller that USA-19HS does not seem to have stability issues with is one based on NEC/Renesas chips.

My current hardware is Intel Z97 chipset (Asus Z97-E mainboard) and USB 3.0 eXtensible host controller driver version is 3.0.2.54 (10/30/2014) running on Windows 7 64bit. But again, I have seen this issue with older systems that provide USB 3.0 ports. What makes the situation worse is that Z97 seems to route all USB 2.0 ports through new USB 3.0 controller and plugging adapter to USB 2.0 ports still causes PC to lock up on system resume.

The driver for USA-19HS has not really been updated since 2007. At that time there were no USB 3.0 controllers. The new driver installer has been released in 2010 to support Windows 7, but driver itself has not been updated. The driver version number as indicated by device manager, remains the same 3.7.0.5 as in 2007 release.

In my line of work I have been dealing with a lot of USB to serial adapters some purchased directly like USA-19HS, some bundled with other equipment.

The USA-19HS is based on Texas Instruments (TI) USB to UART chipset. The important thing to note is that adapters based on other chipsets do not have any of these problems.

I do like that this adapter continues to be supported on new operating systems and that it does not have issues other adapters have. Some other competing products are purposely, maliciously and automatically disabled by manufacturer for use on newer operating systems. They push new driver through windows update that detects chip version and depending on windows version either allow its use or not. Slightly older 64bit driver allows it on all windows versions (7,8,8.1). This is all in attempt to boost sales of new products with same functionality. I will never buy from the company that does this. It will boost sales of course, but for the competition. Some (two) have counterfeit chip problems and punish unsuspecting end users by pushing new driver through windows update that detects and disables the adapters based on these counterfeit chips. Hey, why litigate evil doers when you can have customers do the scrupulous work of determining whether what they buy is genuine or counterfeit. Again, I do not want to give business to companies that do this to me.

If not for USB 3.0 PC lockup and closed port on resume issues, I would highly recommend this product.

There is also the thing with subpar USB connector that does not snap cable tightly and allows it to slip out way too easily. But that is minor compared to other problems. I think I read some response to review that states supplier of connectors has been changed to resolve this issue.

Thanks.

Reviewed by 59 customers

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5.0

Great buy.

By 

from Maryland

Verified Buyer

Comments about Keyspan High Speed USB to Serial Adapter:

Fast, easy and that's what I want.

 
5.0

Works without fail

By 

from Alberta, Canada

Comments about Keyspan High Speed USB to Serial Adapter:

I've been using this model for years in the oilfield measurement industry and it's never failed me. Recently it's been very handy when connecting to Bristol Controllers, as it will allow the program to poll for the local address, where the other adapter I have will not. Just keep an eye on the cord plugged into the back, it has a habit of coming out if your not paying attention.

(3 of 3 customers found this review helpful)

 
1.0

Great, except for Windows 10

By 

from CA

Comments about Keyspan High Speed USB to Serial Adapter:

I've used this adapter for years very successfully with WinXP and Win7. Works perfectly; five stars.

But I cannot get it to work reliably with Windows 10; zero stars. Everything seems OK at first with Win10, but the adapter triggers a blue screen of death from time to time due to a problem in the driver. I can't live with that.

(1 of 1 customers found this review helpful)

 
5.0

Best USB / Serial Adapter Out There

By 

from Idaho

Comments about Keyspan High Speed USB to Serial Adapter:

Contrary to other posted comments, this device does work with El Capitan. I have two that are on two different computers (an iMac and a MacBook Pro) that receive daily use. About to purchase a third for a relative to use on a Mac Mini. I've deployed these on several Windows systems too. Absolutely 100% reliable and works without a hitch on both Mac OS X and Windows.

 
5.0

Works with OSX El Capitan 10.11.1

By 

from Clarks Summit, PA

Comments about Keyspan High Speed USB to Serial Adapter:

Works great on OSX 10.11.1 using Secure CRT.

 
5.0

No Doubt My Lifeline

By 

from Tucson

Comments about Keyspan High Speed USB to Serial Adapter:

As A Mom/Pop Alarm Business In Tucson Az. The Keyspan Is The Lifeline Of My Business, Allowing Me To Communicate To Any Security Panel In My Database To Update Users,Delete,Bypass Faulty Zones Every Conceivable Action To Maintain The Integrity Of Security For My Customers From My Office Without Ever Having To Go To Their Location With No Out Of Pocket Cost To My Customers

(1 of 1 customers found this review helpful)

 
1.0

Look out, OS X (El Captain) not supported...

By 

from Boston

Comments about Keyspan High Speed USB to Serial Adapter:

I've used this product for years, it's been great until now. I've called support and they do not have an eta if at all to continue support for OS X.

(1 of 1 customers found this review helpful)

 
5.0

Works extremely well!

By 

from Tucson, AZ

Comments about Keyspan High Speed USB to Serial Adapter:

I have used this product for over 5 years on both Windows XP and 7 without issue. I have used it to interface several RS232 devices. Make sure to have the driver installed, plug in the device and verify it is loaded in device manager before opening any other software that will use the com port it creates. Do this and you will not have any issues.

Other devices I used would disconnect intermittently and fail to work requiring manual disconnecting and re-connecting, sometimes to a different USB port to get it to work. Not with this product, it has worked for hours at a time without issue.

 
5.0

The most reliable and versatile adapter I have found

By 

from Tustin, CA

Comments about Keyspan High Speed USB to Serial Adapter:

I have worked at a university and a biotech R&D company where we had equipment with serial interfaces. The 19HS has worked with the widest variety of units and with the fewest errors of any adapter I have used. Two thumbs up.

 
5.0

It Just Works. VERY Reliable.

By 

from San Jose, CA

Comments about Keyspan High Speed USB to Serial Adapter:

I've been using one of these for over 10 years on Win-XP, and it works every time, all the time. If you need to add RS-232 to a machine with only USB, you gotta get one of these.

(2 of 2 customers found this review helpful)

 
5.0

Best UART adapter

By 

from San Jose, CA

Comments about Keyspan High Speed USB to Serial Adapter:

Over years of automated embedded device testing these have been the most reliable USB < -> UART adapters for me. I primarily use them from Linux and Mac with pyserial or Device::SerialPort, and sometimes from Windows with FlashMagic. Seems to work fine with Minicom and Screen too.

(2 of 2 customers found this review helpful)

 
5.0

Communicates Successfully Every Time

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

I have hundreds of clients who have equipment with which I occasionally I have to communicate. I use an Apple laptop with the latest OS. Because the client's devices use only PC Windows, I use Parallels to convert to the Windows platform. Then I use the Keyspan serial adapter and a special modem to get the signal onto the phone lines. The Keyspan works every time.

(3 of 4 customers found this review helpful)

 
1.0

USA-19HS issues, unstable with USB 3.0, hard lockup on resume from standby

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

The USA-19HS adapter and/or its driver causes following issues when computer resumes from S3 standby or sleep mode:

1. In case adapter is attached to USB 3.0 port, whether COM port is idle or open, the PC locks up while attempting to resume from standby (the lights turn on, fans start to turn, but there is no video/display). Reboot with reset button or power cycle is required.

2. In case adapter is attached to standard USB 2.0 or USB 1.1 port, the application that had COM port open at the time PC transitioned to sleep mode loses the connection to the port on system resume. The port must be re-opened within application after resume.

The issue with USB 3.0 comes up when using PC with Intel integrated USB 3.0 controller. I have also seen it with Asmedia USB 3.0 controllers, but they have problems of their own. Intel however is stable with everything else I have. Since IntelÕs USB 3.0 controller is present on every new PC, I thought it might be good idea to report the issue. I hope it is going to be resolved in the next USA-19HS driver update.

The only USB 3.0 host controller that USA-19HS does not seem to have stability issues with is one based on NEC/Renesas chips.

My current hardware is Intel Z97 chipset (Asus Z97-E mainboard) and USB 3.0 eXtensible host controller driver version is 3.0.2.54 (10/30/2014) running on Windows 7 64bit. But again, I have seen this issue with older systems that provide USB 3.0 ports. What makes the situation worse is that Z97 seems to route all USB 2.0 ports through new USB 3.0 controller and plugging adapter to USB 2.0 ports still causes PC to lock up on system resume.

The driver for USA-19HS has not really been updated since 2007. At that time there were no USB 3.0 controllers. The new driver installer has been released in 2010 to support Windows 7, but driver itself has not been updated. The driver version number as indicated by device manager, remains the same 3.7.0.5 as in 2007 release.

In my line of work I have been dealing with a lot of USB to serial adapters some purchased directly like USA-19HS, some bundled with other equipment.

The USA-19HS is based on Texas Instruments (TI) USB to UART chipset. The important thing to note is that adapters based on other chipsets do not have any of these problems.

I do like that this adapter continues to be supported on new operating systems and that it does not have issues other adapters have. Some other competing products are purposely, maliciously and automatically disabled by manufacturer for use on newer operating systems. They push new driver through windows update that detects chip version and depending on windows version either allow its use or not. Slightly older 64bit driver allows it on all windows versions (7,8,8.1). This is all in attempt to boost sales of new products with same functionality. I will never buy from the company that does this. It will boost sales of course, but for the competition. Some (two) have counterfeit chip problems and punish unsuspecting end users by pushing new driver through windows update that detects and disables the adapters based on these counterfeit chips. Hey, why litigate evil doers when you can have customers do the scrupulous work of determining whether what they buy is genuine or counterfeit. Again, I do not want to give business to companies that do this to me.

If not for USB 3.0 PC lockup and closed port on resume issues, I would highly recommend this product.

There is also the thing with subpar USB connector that does not snap cable tightly and allows it to slip out way too easily. But that is minor compared to other problems. I think I read some response to review that states supplier of connectors has been changed to resolve this issue.

Thanks.

(2 of 2 customers found this review helpful)

 
5.0

Works Great.

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

Only one we could find that works with a variety of CNC equipment. We use it to upload/download from a laptop.

 
5.0

The industry standard!

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

I've been using this USB to serial adaptor for close to 5 years, and I've used others as well, and they're supposed to be compatible.... Don't hold your breath!

This is the one that will work with almost any OS and/or software! I am a 35 year alarm technician and also work with other tech as well. Save your time this is the one for you!

In my field, we still are way behind the time as most of the modems still used for downloading and programming systems are at least 35 years old as well

(Hayes Smartmodem) Which run around 300-1200 baud.

 
5.0

It works

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

I bought this product so I could download info from the internet to my car diagnostic device. I looked at a lot of them but only Tripp Lite 19HS fit the bill. When I received it I plugged right to my computer and it did the job.

 
5.0

Only one that is Dependable.

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

I have used this product for over 8 years. They are the only ones that will always work no matter what platform you are on. Other usb-serial adapter are hit or miss as to functionality on different computers and system. This is the only one that I have found that the hardware and software are from the same people. This is the only ones that I would and do recommend.

 
5.0

AV Industry must have

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

A lot of legacy and even current AV equipment still uses serial cable communication. I have a MacBook Pro running Yosemite, with Windows 8.1 running in Parallels. MOST of the AV configuration software is Windows only. This device allows my Virtual Windows PC to talk to an external serial device with this adaptor as if it were all native on it's own machine. Fantastic!

 
5.0

FANTASTIC

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

I've used this for years to allow older serial based equipment to work with newer hardware and it's been perfect. Currently using it with a Mutoh SC-650 as it was easier than finding a laptop with a DB9 port. I'd have no hessitation is buying another as and when the situation requires it. Recently went to set-up a mac book to cut graphics and was surprised to find current mac support on such an old adapter as well. Nice that it's not been abandoned.

 
1.0

Works until it doesn't

By 

from Undisclosed

Comments about Keyspan High Speed USB to Serial Adapter:

I was using my USA-19HS without incident all day to console into a Cisco 3650 switch. I moved it over to a Cisco 1131AG AP, consoled in, and it stopped sending keystrokes to the console. After a reset of the AP, it stopped sending console output. I thought it was a failed AP but it was the Keyspan adapter. Swapped console cables, swapped the USB pigtail, and now all I can do is throw the Keyspan in the trash. I have no idea what caused the adapter to fail, but I'm not inclined to give this item a second chance. It is far too expensive for what it does.

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