National Instruments Corporation USB-6501, 24-Ch Digital I/O 5 V TTL, 3.3 V, 8.5 mA and NI-DAQ
- 24 digital I/O lines, one 32-bit counter
- Over-voltage protection, 8.5 mA current drive
- Built-in screw terminals or generic 34-pin connector (OEM version) for easy integration
- USB 2.0 full-speed (12 Mb/s) bus interface
- Bus-powered design for convenience
- OEM version available, part number 192317-50, please call for pricing
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The National Instruments USB-6501 is a USB-based digital I/O device that provides 24 lines of bidirectional digital I/O with 5 V TTL/CMOS compatibility. Each line can be individually configured as input or output, supporting up to 8.5 mA source/sink current per line. The device is powered solely by the USB bus, eliminating the need for an external power supply. It is designed for portable or desktop applications requiring simple digital control or monitoring, such as switch monitoring, LED control, or interfacing with relays and other digital devices. The USB-6501 is supported by NI-DAQmx driver software, enabling easy integration with LabVIEW, LabWindows/CVI, and Measurement Studio for Windows. The compact enclosure and plug-and-play USB connectivity make it ideal for quick setup and deployment in a variety of test, measurement, and automation tasks.