Question about Keyspan (USA-19QW) Serial Adapter

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Keyspan usa-19qw ii was using a USA-19hs and then the company sent me a USA 19qw ..it does not work with the applications that i am running which is a nuero feedback application..can you tell me why when the vendor sent it to me and said it would...

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The qw is an older device that doesn't have Windows Vista support.  Assuming you are running Vista, you will need the HS version.  Here is a link to the current Keyspan USB support, verify Vista support before purchasing:  USB Connectivity & Device Servers

Posted on Apr 26, 2009

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Usb doesnt recognize serial device


You didn't mention exactly what keyspan device you're trying to install. That's some pretty important information, but I'm going to make a suggestion based on what I've got at this moment. If you need more, you've got to give more info.

I'm assuming that if there is a power supply for your device, it is plugged in and working properly. Do you have the drivers installed for the end device? If not, the device might not be backward compatible. Your best bet would be to simply run it on an older computer, if you can.

If it was me, I think I'd carefully check the pins on the device you're trying to adapt to USB. Those pins are pretty delicate, compared to USB. One bent or missing data pin and it might not work.

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Can't set up to use.


this should work with OS 8.1 or greater, as long as your slot is 5v and not 3.3v but there are serial printer port driver issues, but nothing other than the usual, see below http://www.keyspan.com/products/sxpro/homepage.2.reqs.spml http://www.keyspan.com/products/sxpro/homepage.2.compat.spml

Oct 02, 2007 | Keyspan SX Pro (SX-PRO4) Serial Adapter

1 Answer

I have not been able to find a Driver for Windows 7 for the Keyspan USB adaptor model USA-49wlc


download this http://marc.oya.free.fr/fichiers/KeyspanUSA49wWinV31c.exe

they are not specifically designed for win 7 but they work fine

If you found this info useful please vote for me

Mar 26, 2011 | Keyspan USB 4-Port Serial Adapter...

1 Answer

IEEE 1394 card will not install in windows XP SP3. There are no drivers available from the company.


Tough One... But I did manage to find where they went; it seems you need to be a member, for additional information. As a registered user of PPA International, you should be able to request a link for the driver. Give it a try, register for the newsgroup e-mail and then use the 'contact us' feature to request the location and or link to the archived driver, it never hurts to ask..

ppa Int'l or cut/paste the link into your Browser: http://ppa-usa.com/

Thank You For Choosing FixYa~!

Mar 25, 2011 | PPA International 1202 4 Port IEEE 1394...

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I need a Vista driver for the USA-19QW Serial Adapter


I have an old 4-port Keyspan serial device that also doesn't work with Vista.  Unfortunately Keyspan didn't provide Vista drivers for some of the older USB to Serial devices before they were acquired by Tripp-Lite, so you will probably need to get a replacement (Keyspan usa-19hs has Vista support, that one works for me).  The support page for Keyspan USB devices is here: USB Connectivity & Device Servers

Apr 20, 2009 | Keyspan (USA-19QW) Serial Adapter

1 Answer

Built wire OBDII to usb


HERE it is... or save yourself time and hassle, and BUY one.

Jan 15, 2009 | Keyspan (USA-19QW) Serial Adapter

1 Answer

Keyspan SX Pro Serial Adapter set up


Do you have the driver cd of the card. For setting up a PCI card simply insert it in the pci slot and install drivers when it asks you.

I think your PCI card needs drivers

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