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National Instruments USB-6251 OEM Board-only multifunction data acquisition device
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National Instruments · USB

USB-6251 OEM

The NI USB-6251 OEM is a board-only M Series multifunction USB DAQ for embedded-system integration. It combines 16-bit analog input, two analog outputs, 24 digital I/O lines and two 32-bit counters/timers.

ManufacturerNational Instruments
ModelUSB-6251 OEM
Part Number194929-03
Product TypeBoard-only multifunction data acquisition device
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30-Day Warrantystandard coverage
30-Day Returnspolicy applies
Technical Supportmodel & compatibility help
FormatOEM board-only device; no enclosure
Analog inputs16 single-ended or 8 differential, 16-bit
Maximum AI sampling1.25 MS/s single channel; 1 MS/s multichannel aggregate
Analog outputs2 channels, 16-bit
Digital I/O24 lines
Counters/timers2 counters, 32-bit
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Overview

Product overview

Key product information and technical features.

Part 194929-03 identifies the USB-6251 OEM board-only version. NI lists this format for embedded systems and OEM integration, distinct from the enclosed USB-6251 variants.

Its multifunction architecture combines voltage acquisition, analog output, digital I/O and counter/timer functions. Single-channel and multichannel acquisition have different maximum rates, so the aggregate sampling limit should be considered when configuring several inputs.

  • Board-only OEM construction for embedded-system integration.
  • 16-bit analog acquisition with single-ended or differential input configurations.
  • Two 16-bit analog output channels.
  • 24 digital I/O lines and two 32-bit counters/timers.
Verified specifications

Technical data

Verified product specifications.

Manufacturer part number194929-03
Mechanical formatOEM board-only, no enclosure
Analog input configuration16 single-ended or 8 differential channels
ADC resolution16 bit
Maximum single-channel AI sampling rate1.25 MS/s
Maximum multichannel aggregate AI sampling rate1.00 MS/s
Analog output channels2 channels
DAC resolution16 bit
Maximum AO update rate, one channel2.86 MS/s
Maximum AO update rate, two channels2.00 MS/s
Digital I/O24 lines
Counter/timer count2
Counter/timer resolution32 bit
Condition & included items

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Condition

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Included

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Compatibility

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National Instruments

Manufacturer

M Series USB DAQ

Product family and host interface

USB-6251 OEM

Board-only multifunction DAQ

Integration resources

NI provides dimensional drawings and 3D CAD entries specifically for part 194929-03.

Use OEM-specific wiring documentation; NI's general 62xx cable/accessory guide explicitly excludes USB OEM models.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

USB-6251 Product Page and OEM Part IdentificationProduct Page · ni.com
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High-Speed M Series Multifunction DAQ DatasheetDatasheet · ni.com
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USB-6251 Dimensional Drawings and CAD ModelsMechanical Drawings · ni.com
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OEM Mechanical Drawings and CAD Files for 194929-03Technical resource
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Shipping, warranty & returns

Commercial terms

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Shipping
Free Shipping. Full policy terms apply.
Warranty
30-Day Warranty. Standard coverage applies.
Returns
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Alternatives & system components

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

What does OEM mean for this USB-6251?

NI identifies part 194929-03 as the USB-6251 OEM board-only kit without an enclosure, intended for embedded-system integration.

Can all analog inputs sample at 1.25 MS/s each?

No. The maximum is 1.25 MS/s for a single channel and 1 MS/s aggregate for multichannel acquisition.

Where can I find mechanical integration files?

NI's USB-6251 dimensional-drawings page lists 2D drawings and 3D CAD files for OEM part 194929-03.

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