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National Instruments PCI-6221 Multifunction data acquisition board
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National Instruments · PCI

PCI-6221

The National Instruments PCI-6221 is an M Series multifunction PCI data acquisition board with analog input, analog output, digital I/O, and two 32-bit counters/timers. The catalog record does not identify whether this board is the 37-pin or 68-pin version.

ManufacturerNational Instruments
ModelPCI-6221
Product TypeMultifunction data acquisition board
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Analog inputs16 single-ended or 8 differential
Input resolution16-bit
Maximum input sample rate250 kS/s aggregate
Analog outputs2 channels, 16-bit
Connector versions68-pin VHDCI or 37-pin D-SUB; record variant unresolved
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Overview

Product overview

Key product information and technical features.

The PCI-6221 combines voltage acquisition, analog signal generation, correlated digital I/O, and digital triggering on a PCI board. NI identifies laboratory automation, research, design verification, and manufacturing test as relevant uses.

Connector identification is important: NI documents separate 37-pin and 68-pin versions. The supplied legacy description mixes digital I/O details from these versions, so version-dependent specifications must not be treated as confirmed for this catalog item.

  • Selectable analog input ranges of ±0.2 V, ±1 V, ±5 V, and ±10 V.
  • Two analog outputs with a ±10 V output range.
  • Two 32-bit counters/timers and digital triggering.
Verified specifications

Technical data

Verified product specifications.

Analog input configuration16 single-ended or 8 differential channels
Analog input resolution16 bit
Maximum analog input sample rate250; single channel or multichannel aggregate kS/s
Analog input ranges±0.2, ±1, ±5, ±10 V
Analog output channels2 channels
Analog output resolution16 bit
Maximum analog output update rate833 with one channel; 740 per channel with two channels kS/s
Analog output range±10 V
Counters/timers2 counters, 32-bit resolution
Condition & included items

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Condition

Confirmed per unit.

Included

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Revision

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Compatibility

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National Instruments

Manufacturer

M Series / PCI

DAQ family and host interface

PCI-6221

Multifunction I/O board

Driver ecosystem

NI-DAQmx; select a release appropriate to the device and host software environment.

Confirm the board's connector version before selecting cables or terminal accessories.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

PCI-6221 Product OverviewOfficial Product Page · ni.com
Open →
PCI/PXI/USB-6221 68-Pin SpecificationsSpecifications And Pinout · ni.com
Open →
NI 6221 37-Pin Device SpecificationsSpecifications PDF · download.ni.com
Open →
NI 62xx Multifunction I/O Cable and Accessory Compatibility GuideTechnical resource
Open →
Shipping, warranty & returns

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Warranty
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Returns
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FAQ

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Product-specific answers based on available technical information.

Does 250 kS/s apply to every analog input channel?

No. The maximum is 250 kS/s for one channel or 250 kS/s aggregate across multiple channels.

Does this record identify the connector version?

No. NI documents both 68-pin VHDCI and 37-pin D-SUB PCI-6221 versions. Check the actual board before choosing accessories.

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