The National Instruments USB-6501 is a compact and portable Digital I/O device designed for applications requiring reliable bidirectional digital communication. This device features 24 Digital Input/Output lines, configured as open collector by default, allowing for flexible integration into various control and automation systems. The USB-6501 utilizes a USB 2.0 bus connector, ensuring compatibility with a wide range of host systems while offering a digital input voltage range of -0.3 V to 5.8 V. It is equipped with an LED status indicator that provides real-time feedback on the device's operational state; it illuminates green when connected and operational, blinks during normal operation, and remains off in suspended mode.

For user convenience, the USB-6501 includes two detachable connector plugs featuring screw terminals that accept wire gauges from 16 AWG to 28 AWG, facilitating easy connections to external signals. Additionally, the device supports external pull-up resistors for enhancing source current drive up to 8.5 mA per line. The USB-6501 also incorporates a 32-bit counter/timer for precise timing applications, achieving a data transfer rate of 12 Mbit/s. It operates seamlessly with the NIDAQmx driver software and is compatible with popular application development environments such as LabVIEW and LabWindows/CVI. With dimensions of 3.22 x 3.35 x 0.91 inches and a weight of just 3 ounces, the USB-6501 is a lightweight solution ideal for diverse digital I/O tasks. The device comes with a three-year warranty, and detailed documentation, including user and maintenance manuals, is available for download. For pricing inquiries, please contact a sales representative.