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NI (National Instruments) USB-6255 80 AI (16-Bit, 1.25 MS/s), 2 AO (2.86 MS/s), 24 DIO USB Multifunction I/O Device
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NI (National Instruments) · USB 2.0

USB-6255

The NI USB-6255 is a USB 2.0 multifunction I/O device with up to 80 single-ended or 40 differential analog inputs, 2 analog outputs, and 24 bidirectional digital channels. Its analog inputs provide 16-bit resolution and a maximum sample rate of 1.25 MS/s.

ManufacturerNI (National Instruments)
ModelUSB-6255
Part Number779959-06 · 779958-12
Product Type80 AI (16-Bit, 1.25 MS/s), 2 AO (2.86 MS/s), 24 DIO USB Multifunction I/O Device
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Bidirectional Digital Channels24
Max Single-Ended Analog Input Channels80
Number of Counters/Timers2
Max Differential Analog Input Channels40
Analog Input Absolute Accuracy1920 μV
Analog Input FIFO Buffer Size4095 samples
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Overview

Product overview

Key product information and technical features.

The USB-6255 combines analog input, analog output, digital I/O, and counter/timer functions in a USB-connected DAQ device. It supports up to 80 single-ended or 40 differential analog input channels with 16-bit resolution and a 4095-sample analog input FIFO.

The device provides a maximum analog input sample rate of 1.25 MS/s and is not a simultaneous-sampling device. Two analog outputs, 24 bidirectional digital channels, and two counters/timers complement its input capabilities.

  • Up to 80 single-ended or 40 differential analog input channels.
  • 16-bit analog input resolution with a maximum sample rate of 1.25 MS/s.
  • 4095-sample analog input FIFO buffer.
  • Two analog output channels with a maximum update rate of 2.86 MS/s.
  • 24 bidirectional digital channels and two counters/timers.
  • USB 2.0 connection with analog and digital triggering support.
Verified specifications

Technical data

Verified product specifications.

Number of Bidirectional Digital Channels24
Maximum Number of Single-Ended Analog Input Channels80
Number of Counters/Timers2
Maximum Number of Differential Analog Input Channels40
Analog Input Absolute Accuracy1920 μV
Analog Input FIFO Buffer Size4095 samples
Maximum Sample Rate1.25 MS/s
Simultaneous SamplingNo
Analog Input Resolution16 bits
Bus ConnectorUSB 2.0
Number of Analog Output Channels2
Maximum Analog Update Rate2.86 MS/s
Bus ConnectionUSB 2.0
NI part numbers779959-06, 779958-12, 779958-11, 779959-12, 779959-11, 779959-07, 779959-04
NI part numbers (cont. 2)779958-09, 779959-09, 779959-10, 779958-10, 779958-01, 779958-03, 779958-02
NI part numbers (cont. 3)779959-03, 779959-02, 779959-01, 197201-01, 779958-04, 779958-06, 779958-07
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NI

Manufacturer

USB 2.0

Bus Connector

USB-6255

This product

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Manuals & software

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Specifications (NI)Specifications · ni.com
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Letter Of Volatility (NI)Letter Of Volatility · 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 USB-6255 provide?

It supports up to 80 single-ended analog input channels or 40 differential analog input channels.

Does the USB-6255 sample its analog inputs simultaneously?

No. The USB-6255 is not a simultaneous-sampling device. Its listed maximum analog input sample rate is 1.25 MS/s.

What output and digital I/O capabilities are included?

The USB-6255 has two analog output channels with a maximum update rate of 2.86 MS/s, 24 bidirectional digital channels, and two counters/timers.

What interface does the USB-6255 use?

The device uses a USB 2.0 host connection.

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