National Instruments PXI-6251 Multifunction data acquisition module
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National Instruments · PXI

PXI-6251

The National Instruments PXI-6251 is an M Series multifunction DAQ module combining analog input, analog output, digital I/O, and counter/timer functions in a PXI system.

ManufacturerNational Instruments
ModelPXI-6251
Product TypeMultifunction data acquisition module
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Analog inputs16 single-ended or 8 differential
Input resolution16-bit
Maximum acquisition rate1.25 MS/s single-channel; 1.00 MS/s multichannel aggregate
Signal connectorOne 68-pin VHDCI
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Overview

Product overview

Key product information and technical features.

This PXI member of the NI M Series integrates measurement and control I/O on one module. Select cabling and terminal accessories using NI's model-specific 62xx compatibility guide.

  • Selectable single-ended or differential analog acquisition.
  • Seven bipolar input ranges from ±0.1 V to ±10 V.
  • Six DMA channels for I/O data transfers.
Verified specifications

Technical data

Verified product specifications.

Analog input channels16 single-ended or 8 differential
ADC resolution16 bit
Maximum single-channel sampling rate1.25 MS/s
Maximum multichannel aggregate sampling rate1.00 MS/s
Input ranges±0.1, ±0.2, ±0.5, ±1, ±2, ±5, ±10 V
Input couplingDC
I/O connectorOne 68-pin VHDCI
Form factorStandard 3U PXI
Condition & included items

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Included

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Revision

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Compatibility

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National Instruments

Manufacturer

PXI

Platform

PXI-6251

M Series multifunction DAQ module

Driver evidence

NI-DAQmx 14.1 explicitly lists NI 6251 PXI support.

Verify the board revision before assuming PXI Express hybrid-slot or PXI/SCXI combo-chassis support.
Manuals & software

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Warranty
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Returns
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Does 1.25 MS/s apply to multichannel acquisition?

No. The maximum is 1.25 MS/s for one channel and 1.00 MS/s aggregate for multichannel acquisition.

Can every PXI-6251 use a PXI Express hybrid slot?

No. Hybrid-slot and PXI/SCXI control capabilities depend on board revision; check NI's compatibility table against the actual module.

Where can I check signal cabling?

NI's 62xx accessory guide lists the PXI-6251 in its 68-pin VHDCI group and provides cable and terminal-accessory options.

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