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NI (National Instruments) PCI-6281 16 AI (18-Bit, 625 kS/s), 2 AO (2.8 MS/s), 24 DIO PCI Multifunction I/O Device
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NI (National Instruments) · PCI

PCI-6281

The NI PCI-6281 is a PCI multifunction DAQ device with 18-bit analog input resolution and a maximum sample rate of 625 kS/s. It provides up to 16 single-ended or 8 differential analog inputs, 2 analog outputs, 24 bidirectional digital channels and 2 counters/timers.

ManufacturerNI (National Instruments)
ModelPCI-6281
Part Number779109-01
Product Type16 AI (18-Bit, 625 kS/s), 2 AO (2.8 MS/s), 24 DIO PCI Multifunction I/O Device
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Bidirectional Digital Channels24
Supported Power InputBus Powered
Max Single-Ended Analog Input Channels16
Number of Counters/Timers2
Max Differential Analog Input Channels8
Analog Input Absolute Accuracy980 μV
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Overview

Product overview

Key product information and technical features.

The PCI-6281 combines analog acquisition, analog output, digital I/O and counter/timer functions on a PCI device. Its analog input subsystem offers 18-bit resolution, up to 16 single-ended or 8 differential channels, and a 2047-sample FIFO. Analog inputs are not sampled simultaneously.

The device provides 2 analog outputs with a maximum update rate of 2.86 MS/s, alongside 24 bidirectional digital channels. It is bus powered and uses a VHDCI front connection. Consult the NI specifications for operating conditions and rate limits before configuring a measurement system.

  • 18-bit analog input resolution with a maximum sample rate of 625 kS/s.
  • Supports up to 16 single-ended or 8 differential analog input channels.
  • Selectable analog input ranges from ±0.1 V through ±10 V.
  • Two analog output channels with a maximum update rate of 2.86 MS/s.
  • 24 bidirectional digital channels and 2 counters/timers.
  • Supports analog and digital triggering.
Verified specifications

Technical data

Verified product specifications.

Number of Bidirectional Digital Channels24
Supported Power InputBus Powered
Maximum Number of Single-Ended Analog Input Channels16
Number of Counters/Timers2
Maximum Number of Differential Analog Input Channels8
Analog Input Absolute Accuracy980 μV
Analog Input FIFO Buffer Size2047 samples
Maximum Sample Rate625 kS/s
Simultaneous SamplingNo
EnclosedYes
Analog Input Resolution18 bits
Bus ConnectorPCI
Front Connection TypeVHDCI
Number of Analog Output Channels2
Maximum Analog Update Rate2.86 MS/s
Bus ConnectionPCI
Analog Input Voltage Range-0.1 V to 0.1 V, -0.2 V to 0.2 V, -0.5 V to 0.5 V, -1 V to 1 V, -2 V to 2 V
Analog Input Voltage Range (cont. 2)-5 V to 5 V, -10 V to 10 V
NI part numbers779109-01
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NI

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PCI

Bus Connector

PCI-6281

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Manuals & software

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Getting Started (NI)Getting Started · ni.com
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Specifications (NI)Specifications · ni.com
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Dimensional Drawings (NI)Dimensional Drawings · ni.com
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Product Page (NI)Product Page · ni.com
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

How many analog input channels does the PCI-6281 provide?

It supports up to 16 single-ended or 8 differential analog input channels.

What are its analog input resolution and maximum sample rate?

The analog input resolution is 18 bits and the maximum sample rate is 625 kS/s. The inputs are not sampled simultaneously.

Does the PCI-6281 include analog outputs and digital I/O?

Yes. It provides 2 analog output channels, 24 bidirectional digital channels and 2 counters/timers.

What bus and signal connection does it use?

The PCI-6281 uses a PCI host bus connection and a VHDCI front connection. It is bus powered.

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