Widely recommended by serial device manufacturers, the USAHS attaches to switches, routers, barcode scanners, GPS units, point-of-sale devices, lab equipment, network storage devices and other devices with a 9-pin serial port. The following picture shows the transmit data levels from the Keyspan adapter. The received data signal was getting up to 6V, marginally OK, but it was not going below ground. In the example below “COM2” is not in use and will be selected. Need help with your purchase? 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.

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I have little confidence in the Mac drivers from other brands. Do this and you will not have any issues.

For further details see delivery estimates in cart. Then I upgraded to OS-X Network Switches Gigabit Ethernet Switches. Call Us 1 The included 3-foot detachable cable supports data transfer speeds up to Kbps—twice as fast as a built-in serial port. Packaging Info Package Weight 0. Thank You for Submitting Your Review,!

Also I have a Orion Auto guider and a Meade deep sky camera working too and it all works perfect! Place your order by 5pm Mon Dec 31 and your order will ship the same day. The initial problem was that the USB adapter provides only one control line output see pinout on the Keyspan product support page. Tripp Lite W. There is a new feature in Mac OS X Easy to upgrade with free software downloads.


The device is very reliable and performs well. If you’re new to infrastructure planning, we’ll give you all the help you need. There seem to be multiple versions of the adapter, with slightly different model numbers, and it could be that some of them will only work to 56, baud.

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COM Port Mapping with Keyspan USB Serial Adapter

Your message has been reported and will be reviewed by our staff. If you’re already an expert, we won’t waste your time. DC levels had similar ranges. This is only needed once.

Keyspan USA19HS USB to Serial Adapter (Mac/PC) USA19HS B&H Photo

Click on the “Options” icon as circled in red below: In Stock Update Location close. On that note- The original USB cord that Keyspan supplied was a thicker shielded type with clear outer jacket. This was a large enough swing to drive the LocoNet itself, but not to power the receive level shifter in the MS Neither was my phone call to the manufacturer as after troubleshooting by phone I was told that it ‘could just be an individual malfunction.


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JMRI Hardware Support – Keyspan USB adapter

Be the first to review this item. No communications error should appear if properly configured.

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 connection.