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July 2025
USB-6281
USB-6281, 16 AI, 2 AO, 24 DIO, USB Multifunction I/O Device
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
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May 2025
Gregg Flecki**** Verified Buyer
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January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments USB-6281 Multifunction I/O Device
The NI USB-6281 (Part Numbers: 780054-01, 780054-07, 780053-04, 780053-01, 780054-04) is a Multifunction I/O Device by National Instruments. This instrument provides low-cost data acquisition capabilities and reliable operations in a wide range of applications. This device works for simple applications in laboratory automation and research, design verification, and manufacturing test. This device works with SCC and SCXI signal conditioning modules. This collaboration adds a sensor and high-voltage measurements to this device. The user can configure this device easily with the help of the NI-DAQmx driver.
The NI USB 6281 has 16 single-ended or 8 differential analog input channels. These channels provide 18-bits ADC resolution. The sample rate for a single channel is 625 kS/s maximum. The sample rate for multiple channels is 500 kS/s maximum. This module provides protection in the overvoltage condition. This protection covers all sense and analog input channels. The value of the overvoltage protection is ±25 V when the device is on or ±15 V when the device is off. This overvoltage protection is for up to eight AI pins. The input current is ±25 mA maximum/AI pin during the overvoltage condition. The input bias current value of this product is ±100 pA.
The NI DAQ USB 6281 has two analog output channels. These channels provide 16-bits DAC resolution. One output channel offers an update rate of 2.86 MS/s maximum. Both output channels collectively offer an update rate of 2.00 MS/s per channel maximum. The NI USB-6281 M Series DAQ also offers a timing accuracy of 50 ppm.
| Model | USB-6281 |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 780054-01, 780054-07, 780053-04, 780053-01, 780054-04 |
| Type | Multifunction I/O Device |
| Analog Input Channels | 8 differential or 16 single-ended |
| Analog Output Channels | 2 |
| Maximum Sample Rate | 625 kS/s |
| Dimensions | Screw Terminal: 10.5 in. × 6.73 in. × 1.75 in. |
| Weight | Screw Terminal: 3 lb 3.4 oz. |
| USB-6281 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for USB-6281:
National Instruments USB-6281 Frequently Asked Questions
Question: What are the differences between the five part numbers for the NI USB-6281?
Answer: The NI USB-6281 has a few types of front connectors and supported power inputs available: part number 780054-01 with an SCSI front connector and United States 120 VAC supported power input, part number 780053-01 with a screw terminal front connector and United States 120 VAC supported power input, part number 780054-04 with an SCSI front connector and Universal Euro 240 VAC supported power input, part number 780053-04 with a screw terminal front connector and Universal Euro 240 VAC supported power input, and part number 780054-07 with an SCSI front connector and Japanese 100 VAC supported power input.
Question: What is the analog input FIFO buffer size for the NI USB-6281 M Series DAQ?
Answer: The analog input FIFO buffer size for the NI USB-6281 M Series DAQ is 2,047 samples.
Question: What is the maximum channel-to-earth working voltage for the NI USB 6281?
Answer: The maximum channel-to-earth working voltage for the NI USB 6281 is 11 V, Measurement Category I.
Question: What is the analog input absolute accuracy of the NI DAQ USB 6281?
Answer: The analog input absolute accuracy of the NI DAQ USB 6281 is 980 uV.
USB-6281 PDF Manuals
DAQ-GETTING-STARTED-GUIDE-FOR-EXTERNALLY-POWERED-USB.PDF
DAQ-GETTING-STARTED-GUIDE-FOR-PCI-PCI-EXPRESS.PDF
DAQ-GETTING-STARTED-READ-ME-FIRST-NI-DAQMX-AND-DAQ-DEVICE-INSTALLATION-GUIDE.PDF
EXTERNALLY-POWERED-USB-M-SERIES-PANEL-MOUNTING-KIT-INSTALLATION-GUIDE.PDF
NI-6281-DEVICE-SPECIFICATIONS.PDF
NI-62XX-63XX-PINOUT-LABELS-FOR-THE-SCB-68-NOTE-TO-USERS.PDF
NI-62XX-63XX-PINOUT-LABELS-FOR-THE-SCB-68A-NOTE-TO-USERS.PDF
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