Description:
This listing is for a National Instruments USB‑6501 Digital I/O device, open-box but fully tested and working. Perfect for lab automation, PXI/DAQ setups, or hobbyist digital I/O projects. The USB-6501 is a portable, bus-powered USB digital I/O device, providing reliable data acquisition and control at a low price. 

Key Features:

• Model: USB‑6501

• Manufacturer: National Instruments / Emerson

• Interface: USB, plug-and-play

• I/O: 24 digital lines (TTL compatible)

• Compatibility: Windows, LabVIEW, NI-DAQmx, PXI/USB DAQ setups

• Condition: Open Box, Tested, Fully Functional