| Brand | National Instruments |
|---|---|
| Model | USB-6501, USB6501, USB 6501 |
| MPN | USB-6501 |
Check the listing for details. National Instruments / Emerson USB-6501 - 24-Channel Digital I/O Device. Condition: New – Open box. Listed at 34.99 USD. Interface: USB, plug-and-play. Key Features I/O: 24 digital lines (TTL compatible).