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July 2025
USB-6255
NI USB-6255, 48 Digital I/O Lines, 16-Bit ADC/DAC, USB Multifunction I/O Device
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
✔ Free Domestic Ground Shipping
✔ NIST Calibration Available
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-6255 Multifunction I/O Device
The USB-6255 (Part Numbers: 779959-01, 779958-01, 779958-04, 779959-04) is an instrument for data acquisition from National Instruments. The USB-6255 incorporates a high-performance analog front end designed for fast settling times and accurate measurements at high scan rates.
The NI USB-6255 has 16-bit resolution. The USB-6255 includes 48 digital I/O lines for control, monitoring, and digital communication applications. It also has seven programmable input ranges. This device incorporates analog and digital triggering as well.
The USB-6255 is the best device for testing and controlling many applications. This device also enables the user to design these applications. Portable data logging is one such application. This application helps users log environmental or voltage data quickly and easily. The USB-6255 additionally enables users to test, control, and design field-monitoring applications. This device also works with embedded OEM applications and academic labs. This multifunction I/O device has a recommended calibration interval of two years.
The USB-6255 provides 80 single-ended or 40 differential analog input channels with a maximum sampling rate of 1.25 MS/s. The analog input impedance is greater than 10 GΩ, minimizing loading effects on measured signals.
This multifunction I/O device includes several analog triggers. These triggers perform the functions of Start Trigger, Sample Clock Timebase, Sample Clock, Reference Trigger, Convert Clock, and Pause Trigger. The USB-6255 supports analog triggering functions, including start trigger, reference trigger, pause trigger, and analog window triggering. These triggers work in analog edge triggering mode, analog edge triggering with hysteresis, or analog window triggering mode.
The USB-6255 Multifunction I/O Device is no longer available with National Instruments, but it will remain available in perpetuity with Apex Waves for both purchase and repair services.
| Model | USB-6255 |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 779959-01, 779958-01, 779958-04, 779959-04 |
| Type | Multifunction I/O Device |
| Analog Input Channels | 40 Differential or 80 Single-Ended |
| Analog Output Channels | 2 |
| Resolution | 16 Bits |
| Max Sample Rate | 1.25 MS/s |
| Bus Connector | USB 2.0 |
| Bidirectional Digital Channels | 48 digital I/O lines |
| Max Update Rate | 2.86 MS/s |
| Counter/Timers | 2 |
| FIFO Buffer Size | 4,095 Samples |
| Input Absolute Accuracy | 40 |
| Simultaneous Sampling? | No |
| Enclosed? | Yes |
| Dimensions | 10.5 in. × 6.73 in. × 1.75 in. |
| Weight | 2 lb 11 oz. |
| USB-6255 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Request a Quote |
Associated part numbers for USB-6255:
National Instruments USB-6255 Frequently Asked Questions
Question: Which type of electrical signals does the NI USB-6255 measure?
Answer: The USB-6255 directly measures analog voltage signals through its analog input channels and can also acquire digital signals through its digital I/O lines.
Question: What is the analog input FIFO buffer size on the device?
Answer: The analog input FIFO buffer size on the NI USB-6255 is 4,095 samples.
Question: What is the absolute accuracy of the analog input for the device?
Answer: The USB-6255 has an absolute analog input accuracy of up to 1920 µV on the ±10 V range under specified operating conditions.
Question: Does the USB-6255 support analog triggering?
Answer: Yes. It supports both analog and digital triggering.
Question: Is the USB-6255 a simultaneous-sampling device?
Answer: No. It uses a multiplexed analog input architecture.
USB-6255 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-6255-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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