- 16 analog inputs; programmable 40 kHz lowpass filters
- Two 16-bit analog outputs (2.8 MS/s); 24 digital I/O; two 32-bit, 80 MHz counters
- Correlated DIO (8 clocked lines, 10 MHz); analog and digital triggering
- NI-MCal calibration technology for increased measurement accuracy
- NIST-traceable calibration certificate and more than 70 signal conditioning options
- NI-DAQmx driver software and NI LabVIEW SignalExpress interactive data-logging software
- Data Sheet |
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Select one of the following options for product configuration and pricing:
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The National Instruments PXI-6281 is a high-accuracy multifunction M Series data acquisition (DAQ) module optimized for 18-bit analog input accuracy. This resolution is equivalent to 5½ digits for DC measurements. To ensure accuracy, the NI-PGIA 2 amplifier technology is optimized for high linearity and fast settling to 18 bits, and programmable lowpass filters reject high-frequency noise and prevent aliasing. High-accuracy M Series devices feature programmable offsets and references on the analog output channels to obtain maximum 16-bit resolution on any custom signal. High-accuracy M Series multifunction DAQ devices are ideal for applications including device test and characterization, and for sensor and signal measurements requiring instrument-class accuracy. To learn more about M Series technologies, device specifications, and information on recommended cables and accessories, please refer to the data sheet and specifications.
Driver Software
M Series devices work with multiple OSs using three driver software options – NI-DAQmx, NI-DAQmx Base, and the Measurement Hardware DDK. 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 Development Environments
With NI LabVIEW, you can create custom data acquisition applications with the ease of graphical programming and power of more than 500 analysis functions and advanced programming tools. LabVIEW Full and Professional Development Systems include LabVIEW SignalExpress for interactive data logging. M Series data acquisition devices are compatible with the following versions (or later) of NI application software – LabVIEW 7.x, LabWindows™/CVI 7.x, or Measurement Studio 7.x; LabVIEW SignalExpress 1.x; or LabVIEW with the LabVIEW Real-Time Module 7.1. M Series data acquisition devices are also compatible with Visual Studio .NET, C/C++, and Visual Basic 6.
Additional Product Information
Related Information
Specifications Documents
Specifications Summary
| General | |
|---|
| Form Factor | PXI |
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| OS Support | Windows, Real-Time, Linux, Mac OS |
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| Measurement Type | Quadrature encoder |
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| DAQ Product Family | M Series |
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| LabVIEW RT Support | Yes |
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| Analog Input | |
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| Number of Channels | 16 SE/8 DI |
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| Sample Rate | 625 kS/s |
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| Resolution | 18 bits |
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| Simultaneous Sampling | No |
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| Maximum Voltage Range | -10..10 V |
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| Range Accuracy | 980 µV |
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| Range Sensitivity | 24 µV |
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| Minimum Voltage Range | -100..100 mV |
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| Range Accuracy | 28 µV |
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| Range Sensitivity | 0.8 µV |
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| Number of Ranges | 7 |
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| On-Board Memory | 4095 samples |
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| Signal Conditioning | Low-pass filtering |
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| Analog Output | |
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| Number of Channels | 2 |
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| Update Rate | 2.86 MS/s |
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| Resolution | 16 bits |
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| Maximum Voltage Range | -10..10 V |
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| Range Accuracy | 1540 µV |
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| Minimum Voltage Range | -1..1 V |
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| Range Accuracy | 259 µV |
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| Current Drive (Channel/Total) | 5 mA |
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| Digital I/O | |
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| Number of Channels | 24 DIO |
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| Timing | Hardware, Software |
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| Maximum Clock Rate | 10 MHz |
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| Logic Levels | TTL |
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| Maximum Input Range | 0..5 V |
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| Maximum Output Range | 0..5 V |
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| Input Current Flow | Sinking, Sourcing |
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| Programmable Input Filters | Yes |
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| Output Current Flow | Sinking, Sourcing |
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| Current Drive (Channel/Total) | 24 mA/448 mA |
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| Watchdog Timer | No |
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| Supports Programmable Power-Up States? | Yes |
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| Supports Handshaking I/O? | No |
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| Supports Pattern I/O? | Yes |
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| Counter/Timers | |
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| Number of Counter/Timers | 2 |
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| Resolution | 32 bits |
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| Maximum Source Frequency | 80 MHz |
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| Minimum Input Pulse Width | 12.5 ns |
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| Logic Levels | TTL |
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| Maximum Range | 0..5 V |
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| Timebase Stability | 50 ppm |
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| GPS Synchronization | No |
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| Pulse Generation | Yes |
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| Buffered Operations | Yes |
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| Debouncing/Glitch Removal | Yes |
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| Number of DMA Channels | 2 |
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| Timing/Triggering/Synchronization | |
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| Synchronization Bus (RTSI) | Yes |
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| Triggering | Analog, Digital |
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| Physical Specifications | |
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| Length | 16 cm |
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| Width | 10 cm |
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| I/O Connector | 68-pin VHDCI female |
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System Assurance Programs
Reduce your setup time and total cost of ownership, and get a system you can use out of the box with National Instruments system assurance programs. System assurance programs include:
- Installation and integration test of all individual hardware
- Courtesy installation of system driver sets and application development environments
- Three-year warranty and calibration coverage
- Custom documentation plus a custom restore and startup utility
This service is only available for PXI, NI CompactRIO, and NI Compact FieldPoint systems.
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
Select your application need to see compatible software options for the NI PXI-6281.
| Graphical Programming |
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Text-Based Programming |
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Please select the country where you will use the product(s) so that we can provide you with accurate pricing, availability, and purchasing information
Other compatible software: ANSI C/C++, C#, Visual Basic .NET, Visual Basic 6.0
| Graphical Programming |
|
Text-Based Programming |
Please select the country where you will use the product(s) so that we can provide you with accurate pricing, availability, and purchasing information
Please select the country where you will use the product(s) so that we can provide you with accurate pricing, availability, and purchasing information
Other compatible software: ANSI C/C++, C#, Visual Basic .NET, Visual Basic 6.0
| Graphical Programming |
|
Text-Based Programming |
|
