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July 2025
USB-6251 In Stock | Ships in 3-5 Days
USB-6251, 16 Analog Inputs, 2 Analog Outputs, USB Multifunction I/O Device
Rated 4.22/5 | 9 ratings
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
" 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
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-6251 Multifunction I/O Device
The NI USB-6251 is a Multifunction I/O Device by National Instruments. It comes in multiple connector variations, including screw terminal connectors (part numbers 779627-01, 779627-02, 779627-03, 779627-04, 779627-06, 779627-07, 779627-09, 779627-10), BNC connectors (part numbers 780115-01, 780115-02, 780115-03, 780115-04, 780115-06, 780115-07, 780115-09, 780115-10, 194929F-03L), and mass terminal connectors (part numbers 779694-01, 779694-02, 779694-03). This device offers data acquisition in a simple and portable form. It offers this facility through USB ports on laptops and for other portable computing platforms. The NI USB-6251 also implements synchronization procedures.
The device has 8 differential or 16 single-ended analog input channels. This product offers a sampling rate of 1.25 MS/s for a single channel or 1.00 MS/s for multiple channels. These are the maximum sampling rates. This Multifunction I/O Device provides DC input coupling. The input range for this product is ±1 V, ±2 V, ±5 V, ±10 V, ±0.1 V, ±0.2 V, and ±0.5 V. It provides the working voltage of ±11 V for signal mode as well as common mode. The input impedance value is 10 GΩ when the device is on or when the device is off. An important note to keep in mind is that the warm-up time for the USB-6251 device is 30 minutes, and should be calibrated at least once in 2 years.
The USB-6251 has two analog output channels. This Multifunction I/O Device updates itself at different rates for 1 channel and for 2 channels. For one channel, this value is 2.86 MS/s. For two channels, this rate is 2.00 MS/s per channel. This device additionally offers a timing resolution of 50 ns. The USB-6251 device provides an output range of ±5 V and ±10 V. This Multifunction I/O Device provides DC output coupling. The output current drive of this device is ±5 mA.
The screw terminal model of the USB-6251 weighs 10 oz, while the mass termination model weighs 12.8 oz. Additionally, the screw terminal model measures 10.5 x 6.73 x 1.75 in. in physical dimensions, the BNC model has the dimensions: 11.25 x 6.7 x 2.7 in., and the mass termination model measures 7.4 x 6.73 x 1.75 in. in dimensions. The NI device has recommended operating and storage temperature ranges of 0 ºC to 45 ºC and -20 ºC to 70 ºC respectively, a non-condensing humidity range of 10% RH to 90% RH.
The USB-6251 is considered Obsolete and is no longer available from National Instruments, but it will remain available in perpetuity for both purchase and repairs with Apex Waves.
| Model | USB-6251 |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 779627-01, 779627-02, 779627-03, 779627-04, 779627-06, 779627-07, 779627-09, 779627-10, 780115-01, 780115-02, 780115-03, 780115-04, 780115-06, 780115-07, 780115-09, 780115-10, 779694-01, 779694-02, 779694-03, 194929E-04L, 194929C-04, 194929F-03L |
| Type | Multifunction I/O Device |
| Analog Input Channels | 8 Differential or 16 Single-Ended |
| Analog Output Channels | 2 |
| Digital I/O Channels | 24 |
| Series | M Series |
| USB (Screw Terminal) I/O Connector | 64 Screw Terminal |
| USB (BNC) I/O Connector | 21 BNCs and 30 Screw Terminals |
| USB Screw Terminal Wiring | 16 to 28 AWG |
| Resolution | 16 Bits |
| Driver | NI-DAQmx |
| USB Bus Interface | USB 2.0 (HI-Speed or Full-Speed) |
| DMA Channels | 6 |
| Dimensions | Screw Terminal: 10.5 in. × 6.73 in. × 1.75 in. BNC: 11.25 in. × 6.7 in. × 2.7 in. Mass Termination: 7.4 in. × 6.73 in. × 1.75 in. |
| Weight | Screw Terminal: 2 lb 10 oz. Mass Termination: 1 lb 12.8 oz. |
| Warranty | Three Year Warranty |
| USB-6251 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Request a Quote for Pricing Information |
Associated part numbers for USB-6251:
National Instruments USB-6251 Frequently Asked Questions
Question: What is the difference between the part numbers of the USB-6251?
Answer: The USB-6251 has three types of I/O connectors available, which each have multiple part numbers for different power supplies and countries. Screw terminal connector part numbers: 779627-01 (USA 120 V), 779627-02 (Swiss 220 V), 779627-03 (Australia 240 V), 779627-04 (Europe 240 V), 779627-06 (U.K. 240 V), 779627-07 (Japan 100 V), 779627-09 (Korean Cord, 220VAC), 779627-10 (Chinese Cord, 220V). BNC connector part numbers: 780115-01 (U.S. 120 V), 780115-02 (Swiss 220 V), 780115-03 (Australia 240 V), 780115-04 (Europe 240 V), 780115-06 (U.K. 240 V), 780115-07 (Japan 100 V), 780115-09 (Korean Cord 220VAC), 780115-10 (Chinese Cord 220V). Finally, the mass termination connector part numbers: 779694-01 (U.S 120 V), 779694-02 (Swiss 220 V), 779694-03 (Australia 240 V)
Question: How long is the calibration interval?
Answer: The NI USB-6251 calibration interval is two years.
Question: What type of wiring is on the USB-6251?
Answer: The device has 16 to 28 AWG USB Screw Terminal/BNC screw terminal wiring.
Question: What type of bus interface does the USB-6251 have?
Answer: The Multifunction I/O Device has a USB 2.0 Hi-Speed or full-speed bus interface.
USB-6251 PDF Manuals
ARCHIVED--MICRO-DRIVVEN-COMBUSTION-ANALYSIS-TOOL-USER-MANUAL.PDF
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
GUIDE-D_INITIATION-DAQ-POUR-LES-PC3A9RIPHC3A9RIQUES-USB-C3A0-ALIMENTATION-EXTERNE.PDF
GUIDE-D_INITIATION-DAQ-POUR-PCI-PCI-EXPRESS.PDF
MULTIFUNCTION-IO-PRODUCT-FLYER.PDF
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