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Keyspan by Tripp Lite USA-19HS High-Speed USB Serial Adapter, PC, MAC, supports Cisco Break Sequence

4.7 out of 5 stars 647 customer reviews
| 23 answered questions

List Price: $45.99
Price: $23.95 & FREE Shipping on orders over $35. Details
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In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
1-Pack
  • Enter your model number above to make sure this fits.
  • Serial adapter allows a serial device to be connected to a USB computer
  • Plug-and-play convenience:DB9 serial port is seen as a COM port by your computer, and is available for use by any program that accesses COM ports
  • No need for an external power adapter:draws power directly from your computer via the USB connection
  • DB9 serial port supports data transfer rates up to 230 Kbps:twice the speed of a standard built-in serial port
  • LED shows adapter status and data activity at a glance
103 new from $23.95 1 used from $22.20
$23.95 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Keyspan by Tripp Lite USA-19HS High-Speed USB Serial Adapter, PC, MAC, supports Cisco Break Sequence
  • +
  • Tripp Lite Null Modem Serial RS232 Cable (DB9 F/F) 6-ft. (P450-006)
  • +
  • TRENDnet TU-S9 USB to Serial Converter
Total price: $37.84
Buy the selected items together


Technical Details

Size: 1-Pack
  • Brand Name: Tripp Lite
  • Model Number: USA-19HS

Product Description

Size: 1-Pack

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

Product Details

Size: 1-Pack
  • Product Dimensions: 9 x 5.8 x 2.8 inches
  • Shipping Weight: 0.8 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0000VYJRY
  • Item model number: USA-19HS
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (647 customer reviews)
  • Amazon Best Sellers Rank:
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
  • Date first available at Amazon.com: October 30, 2003

From the Manufacturer

Customer Reviews

Top Customer Reviews

Size: 1-Pack Verified Purchase
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.
1 Comment 52 of 53 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 1-Pack Verified Purchase
(Please see my update at the end of this review before considering the purchase of this adapter)

I've been using the Keyspan USA-19HS for years. The first one was purchased after reading recommendations from several control system experts, and I haven't been disappointed. Rockwell Automation sells their own version of a USB serial port adapter (PN 9300-USBS), but it's about $130. Don't bother. The Keyspan is inexpensive and has proven to be 100% compatible with everything I've needed to connect to via a serial cable.

I've used it with laptops and desktops running Windows 98SE, Windows XP and Windows 7. I've used it on SLC 5/xx series processors, ControlLogix 5000 processors, Siemens/TI 505 series processors, Keyence laser measurement equipment, modems, serial printers, barcode scanners, Reliance and Rockwell/Allen-Bradley drives, and just about everything else. Never a problem. It works with straight serial cables, null modem cables, and every type of serial adapter I've thrown at it. The Keyspan USA-19HS is the cheapest piece of control system communication hardware that I own, and it's probably the most-used. It has never let me down.

Since I first started using the Keyspan adapter, I've bought over a dozen more for service techs, co-workers and even a couple of bosses. The Keyspan is extremely configurable, fast, reliable, durable and easy to use. The Keyspan adapter comes with a driver CD and a USB cable and takes just a few minutes to set up. I keep one in my laptop bag at all times.

UPDATE 4/5/12: it appears that Tripp-Lite has made a few changes since they took over the Keyspan line. Among the changes was a decision to use a cheaper USB socket. From the outside, it looks almost the same.
Read more ›
2 Comments 33 of 33 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 1-Pack
Despite the first reviewers comments, the Keyspan 19HS works just fine with linux. The driver for the 19HS was included in the kernel source a while ago. Standard off-the-shelf kernels (2.4.24 and 2.6.5) work without any patches. In addition to regular usb support, my kernels also load the keyspan and usb-serial modules.
After executing "mknod /dev/ttyUSB0 c 188 0", I am happily communicating with Palms and GPSs using the new /dev/ttyUSB0 device.
1 Comment 44 of 46 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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By A Customer on January 8, 2004
Size: 1-Pack
I usually don't write-up reviews, but I am writing this to let those Mac OSX users (inc Panther which is what I am running) know that this adapter does work. I bought this for my Garmin etrex Legend GPS. I use it with my iBook and my Power Mac G4. It was a flawless installation. (1) I installed the Mac OS X drivers (2) told virtual PC to emulate COM 1 using the OS X driver, and (3) Download GPS map data to my GPS. It's that easy! Keyspan has good instructions to set up your serial devices.
Comment 47 of 50 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 1-Pack
My USA-19HS worked ok for a couple of months, then stopped working. It started identifying itself as a a TUSB3410 Boot Device, which Keyspan's website says meant it was defective. I then went into customer service hell. After I posted my info to a tech support forum on their website, they vanished. I poked again a week and a half later, and they came back and told me to mail the device in. I did so. Then they vanished off the face of the earth. No replacement sent to me, no posts to my electronic tech support thread (despite multiple posts by me), and they don't answer their phones (there's a recording saying to visit the website). Eventually, weeks later, after I threatened to go to the BBB, someone posted and said they'd look for my device and get back to me that afternoon. Two days later, nothing again.

The device works fine, but heaven forbid you actually need to get it replaced. At this point, I have neither my dead device nor a refund -- I mailed it in, and it's gone in a black hole.
9 Comments 73 of 83 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 1-Pack
I bought this to hook up my Garmin eTrex GPS to my iBook running OS X. It did what it says. I transfer data back and forth without a problem. I use it with National Geographics TOPO map program also available at Amazon.
Comment 22 of 25 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Keyspan by Tripp Lite USA-19HS High-Speed USB Serial Adapter, PC, MAC, supports Cisco Break Sequence
This item: Keyspan by Tripp Lite USA-19HS High-Speed USB Serial Adapter, PC, MAC, supports Cisco Break Sequence
Price: $23.95
Ships from and sold by Amazon.com
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