durwood

pretty much you got it. I think the buttons all share the same ground so that makes wiring easier. They had example wiring diagrams.

Here are the differences (I think) but I forgot to ask them when I was emailing them.

USB is faster and the software is 3rd party, but I think it doesn't store the keyset until software loads up maybe?

PS/2 has the keyset uploaded to it directly to the firmware so it's available the second it powers up. Setup software is not 3rd party.

I emailed the company a few months back and they responded quickly if you have any questions.

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