The NI USB-6251 is an M Series multifunction USB DAQ device combining 16-bit analog acquisition, two analog outputs, 24 digital I/O lines, and two 32-bit counters/timers.
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Key product information and technical features.
The USB-6251 combines analog input, analog output, digital I/O, and counter/timer functions in a USB-connected M Series device. NI identifies laboratory automation, research, design verification, and manufacturing test as applications.
NI documents screw-terminal, BNC, mass-termination, and OEM versions. This catalog record does not establish a specific connection variant; confirm the device label and connectors before selecting signal cabling.
Verified product specifications.
| Analog input resolution | 16 bit |
|---|---|
| Maximum analog input rate, single channel | 1.25 MS/s |
| Maximum analog input rate, multichannel aggregate | 1.00 MS/s |
| Analog output channels | 2 channels |
| Analog output resolution | 16 bit |
| Maximum analog output update rate, one channel | 2.86 MS/s |
| Maximum analog output update rate, two channels | 2.00 MS/s |
| Digital I/O lines | 24 lines |
| Counters/timers | 2 counters/timers, 32-bit |
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Manufacturer
Data acquisition platform
Multifunction I/O device
NI-DAQmx
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Product-specific answers based on available technical information.
The connection variant is not confirmed. USB-6251 versions include mass termination, screw terminal, BNC, and OEM; identify the actual device before selecting accessories.
NI identifies NI-DAQmx for configuration and measurements.