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NI USB-6251 BNC

16-Bit, 1.25 MS/s M Series, Integrated BNC, External Power

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  • 8 differential BNC analog inputs (16-bit), 1.25 MS/s single-channel (1 MS/s aggregate)
  • 2 BNC analog ouputs (16-bit, 2.8 MS/s); 24 digital I/O (8 clocked, 8 BNC); 32-bit counters
  • Use mass termination version with SCC signal conditioning
  • NI Signal Streaming for bidirectional high-speed data streams over USB; OEM version available
  • Compatible with LabVIEW, ANSI C/C++, C#, Visual Basic .NET and Visual Basic 6.0
  • NI-DAQmx driver software and NI LabVIEW SignalExpress LE interactive data-logging software


The National Instruments USB-6251 BNC is a USB high-performance M Series multifunction data acquisition (DAQ) module optimized for superior accuracy at fast sampling rates. The NI USB-6251 BNC is ideal for applications such as data-logging and benchtop sensor measurments. It provides 8 analog input, 2 analog output, 8 DIO, 1 APFI and 2 user defined BNC terminals.

The National Instruments USB-6251 BNC is designed specifically for mobile or space-constrained applications. Plug-and-play installation minimizes configuration and setup time, while direct screw-terminal connectivity helps keep costs down and simplifies signal connections.

This module also features the new NI Signal Streaming technology which allows for DMA-like bidirectional high-speed streaming of data across the USB bus. For more information about NI signal streaming, see the resources tab.

Each module also features an OEM version. See the resources tab or use the left navigation to get pricing and technical information. Certified power supply included.

Driver Software
NI-DAQmx driver and measurement services software provides easy-to-use configuration and programming interfaces with features such as DAQ Assistant to help reduce development time. Browse the information in the Resources tab to learn more about driver software or download a driver. M Series devices are not compatible with the Traditional NI-DAQ (Legacy) driver.

Application Software
Every M Series data acquisition device includes a copy of NI LabVIEW SignalExpress LE so you can quickly acquire, analyze, and present data without programming. In addition to LabVIEW SignalExpress, M Series data acquisition devices are compatible with the following versions (or later) of NI application software – LabVIEW 7.1, LabWindows™/CVI 7.x, or Measurement Studio 7.x. M Series data acquisition devices are also compatible with Visual Studio .NET, C/C++, and
Visual Basic 6.

Specifications Documents

View Data Sheet

Specifications Summary

General
Product Name USB-6251 BNC
Product Family Multifunction Data Acquisition
Form Factor USB
Part Number 780115-06 , 780115-07 , 780115-01 , 780115-02 , 780115-03 , 780115-04
Operating System/Target Windows
DAQ Product Family M Series
Measurement Type Quadrature encoder , Voltage
Isolation Type None
RoHS Compliant Yes
USB Power External-Powered
Analog Input
Channels 8
Single-Ended Channels 8
Differential Channels 8
Resolution 16 bits
Sample Rate 1.25 MS/s
Max Voltage 10 V
Maximum Voltage Range -10 V - 10 V
Maximum Voltage Range Accuracy 1.92 mV
Maximum Voltage Range Sensitivity 112 µV
Minimum Voltage Range -100 mV - 100 mV
Minimum Voltage Range Accuracy 52 µV
Minimum Voltage Range Sensitivity 6 µV
Number of Ranges 7
Simultaneous Sampling No
On-Board Memory 4095 samples
Analog Output
Channels 2
Resolution 16 bits
Max Voltage 10 V
Maximum Voltage Range -10 V - 10 V
Maximum Voltage Range Accuracy 2.08 mV
Minimum Voltage Range -5 V - 5 V
Minimum Voltage Range Accuracy 1.045 mV
Update Rate 2.86 MS/s
Current Drive Single 5 mA
Current Drive All 10 mA
Digital I/O
Bidirectional Channels 24
Input-Only Channels 0
Output-Only Channels 0
Timing Software , Hardware
Clocked Lines 8
Maximum Clock Rate 1 MHz
Logic Levels TTL
Input Current Flow Sourcing , Sinking
Output Current Flow Sinking , Sourcing
Programmable Input Filters Yes
Supports Programmable Power-Up States? Yes
Current Drive Single 24 mA
Current Drive All 448 mA
Watchdog Timer No
Supports Handshaking I/O? No
Supports Pattern I/O? Yes
Maximum Input Range 0 V - 5 V
Maximum Output Range 0 V - 5 V
Counter/Timers
Counters 2
Number of DMA Channels 0
Buffered Operations Yes
Debouncing/Glitch Removal Yes
GPS Synchronization No
Maximum Range 0 V - 5 V
Max Source Frequency 80 MHz
Pulse Generation Yes
Resolution 32 bits
Timebase Stability 50 ppm
Logic Levels TTL
Physical Specifications
Length 28.6 cm
Width 17 cm
Height 6.9 cm
I/O Connector Screw terminals , BNC connectors
Timing/Triggering/Synchronization
Triggering Digital , Analog
Synchronization Bus (RTSI) No
Part Number Description Est Ship  US Dollars Qty
NI USB-6251 BNC
780115-01NI USB-6251 M Series DAQ Device, BNC Term, U.S. (120 V)5 - 10$ 2,235.00
Accessories
779697-02BNC Male (plug) to BNC Male (plug) cables,2m, 4 pack of 183882-0210 - 15$ 170.00
780315-01Rugged Carrying Case for Portable Instrumentation5 - 10$ 175.00
780214-01Externally Powered USB M Series Panel Mounting Kit5 - 10$ 57.00

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Extended Warranties

National Instruments designs and manufactures all products to minimize failures, however unexpected failures can still occur. Extended warranties provide a fixed economical price at the time of system purchase, covering any repair costs for up to three years. In addition, they offer the following benefits:

  • Significant cost savings compared to individual repair incidents
  • Fault location, diagnostics, and repair by NI any time the system product fails
  • All parts and labor costs covered as well as any adjustments needed to restore the hardware to manufacturing specifications

For more information about your warranty options:

Calibration

NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. NI provides manual calibration procedures, services to recalibrate your products, and automated calibration software to calibrate many NI measurement products.

Training

NI training is the fastest, most certain route to productivity with NI tools and successful application development.

Repair Services

Return your registered product under warranty at no additional labor and parts cost. NI offers fault location, diagnostics, and repair any time the system fails as well as any adjustments needed to restore the hardware to manufacturing specifications.

Technical Support

ni.com/support