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Requirements and Compatibility | Ordering Information | Detailed Specifications | Pinouts/Front Panel Connections For user manuals and dimensional drawings, visit the product page resources tab on ni.com.

Last Revised: 2009-07-29 14:12:31.0

High-Accuracy M Series Multifunction DAQ - 18-Bit, up to 625 kS/s, up to 32 Analog Inputs


16 or 32 analog inputs at 18 bits, 625 kS/s (500 kS/s scanning) Up to 4 analog outputs at 16 bits, 2.8 MS/s (3 μs full-scale settling) 7 programmable input ranges (±100 mV to ±10 V) per channel Programmable, onboard lowpass filtering	Up to 48 TTL/CMOS digital I/O lines (up to 32 hardware-timed at 10 MHz) Two 32-bit, 80 MHz counter/timers Analog and digital triggering NI-MCal calibration technology for improved measurement accuracy

Overview

NI M Series high-accuracy multifunction data acquisition (DAQ) devices are 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 low noise and fast settling to 18 bits, and the onboard lowpass filter rejects high-frequency noise and prevents aliasing. M Series devices are ideal for applications including test, control, and design. All high-accuracy devices have a minimum of 16 analog inputs, 24 digital I/O lines, seven programmable input ranges, analog and digital triggering, and two counter/timers. They also have an extended two-year calibration interval.

Requirements and Compatibility

OS Information

Windows 2000/XP
Windows Vista x64/x86
Linux®
Mac OS X

Driver Information

NI-DAQmx Base
NI-DAQmx

Software Compatibility

ANSI C
LabVIEW
Visual Studio .NET
Measurement Studio Professional Edition
Visual Basic
LabWindows/CVI

Comparison Tables

Family	Bus	Analog Inputs	AI Resolution (Bits)	Analog Outputs	AO Resolution (Bits)	Max AO Update Rate (MS/s)	AO Range	Digital I/O	Correlated (clocked) DIO
NI 6280	PCI, PXI	16	18	-	-	-	-	24	8, up to 10 MHz
NI 6281	PCI, PXI	16	18	2	16	2.8	Programmable per channel	24	8, up to 10 MHz
NI 6284	PCI, PXI	32	18	-	-	-	-	48	32, up to 10 MHz
NI 6289	PCI, PXI	32	18	4	16	2.8	Programmable per channel	48	32, up to 10 MHz

Application and Technology

M Series for Test

For test, you can use M Series high-accuracy analog inputs and 10 MHz digital lines with NI signal conditioning for applications including electronics test, component characterization, and sensor and signal measurements requiring instrument-class accuracy. The 18-bit analog-to-digital converter (ADC) and available filtering provide a 4 times increase in resolution and 5 times more measurement sensitivity. With fast sampling rates and a low noise floor, these devices can accurately acquire dynamic signals. For better noise rejection, the onboard lowpass filters significantly improve device accuracy. Advanced analog clamping circuitry protects the hardware from overvoltage conditions and ensures accurate measurements on nonsaturated channels. High-accuracy M Series devices are compatible with NI SCC and SCXI signal conditioning platforms, which provide amplification, filtering, and power for virtually every type of sensor. These platforms also are compliant with IEEE 1451.4 smart transducer electronic data sheet (TEDS) sensors, which offer digital storage for sensor data sheet information.

M Series for Control

M Series digital lines can drive 24 mA for relay and actuator control. By clocking the digital lines as fast as 10 MHz, you can use these lines for pulse-width modulation (PWM) to control valves, motors, fans, lamps, and pumps. With four waveform analog outputs, two 80 MHz counter/timers, and six DMA channels, M Series devices can execute multiple control loops simultaneously. The analog outputs on the high-accuracy M Series devices can generate up to 2.86 MS/s and provide user-defined programmable offsets and ranges for maximum waveform resolution over any custom range. High-accuracy M Series devices also have direct support for encoder measurements, protected digital lines, and digital debounce filters for control applications. With up to 32 analog inputs, 32 clocked digital lines, and four analog outputs, you can execute multiple control loops with a single device. For higher-count control loops, you can use M Series devices in conjunction and tightly synchronized with National Instruments analog output devices for 64 or more loops. With the NI SoftMotion Development Module for LabVIEW, you can create a complete custom motion controller with M Series devices.

M Series for Design

For design applications, you can use the wide range of I/O - from 32 analog inputs to 48 digital lines - to measure and verify prototype designs. M Series devices and NI LabVIEW SignalExpress interactive measurement software deliver benchtop measurements to the PC. With LabVIEW SignalExpress interactive configuration-based steps, you can quickly create design verification tests. The fast acquisition and generation rates of high-speed M Series devices along with LabVIEW SignalExpress provide on-the-fly design analysis. You can convert your tested and verified LabVIEW SignalExpress projects to LabVIEW applications for immediate M Series DAQ use and bridge the gap between test, control, and design applications.

Hybrid-Slot-Compatible PXI Modules

M Series modules for PXI are hybrid-slot-compatible so that you can use them in both PXI slots and the hybrid slots found in new PXI Express chassis. The PXI Systems Alliance specifies that hybrid-slot-compatible PXI modules use modified slot connectors to mechanically fit in both PXI slots and hybrid slots. This mechanical change:

Provides compatibility with past, current, and future PXI chassis
Maintains existing product specifications
Requires no software changes (application or driver)
Maintains speed and capability of all PXI communication (PXI Express signaling is not provided)

However, hybrid-slot-compatible PXI modules do not include the pins used to implement PXI local bus communication, which is used for backplane SCXI control from the right-most PXI slot in PXI/SCXI combination chassis (NI PXI-1010, PXI-1011, PXI-1050, and PXI-1052). For these applications, NI provides unmodified M Series PXI modules that maintain the required local bus capabilities. Refer to the SCXI Control of PXI/SCXI Combination Chassis section in the Ordering Information section for part numbers.

Simultaneous and Intelligent Data Acquisition

When you need to obtain performance from a data acquisition device beyond the capabilities of a multifunction DAQ device, National Instruments provides simultaneous sampling with the S Series and intelligent DAQ with the R Series. The S Series architecture dedicates an ADC per channel to provide higher aggregate sampling rates compared to multiplexed devices. S Series devices are ideal for applications including IF digitization, transient recording, ultrasound and sonar testing, and high-energy physics.

R Series multifunction DAQ devices contain a 1M/3M gate field-programmable gate array (FPGA) that is reconfigurable using the NI LabVIEW FPGA Module. These devices have up to eight independent 16-bit analog inputs with up to 200 kHz simultaneous sampling, up to eight independent 16-bit analog outputs with up to 1 MHz simultaneous update rates, and up to 96 digital I/O lines configurable at rates up to 40 MHz. You can customize these devices to develop capabilities such as complete control over the synchronization and timing of all signals and operations; user-defined onboard decision-making logic; and digital lines individually configurable as input, output, counter/timers, PWM, flexible encoder inputs, or user-defined communication protocols.

Signal Conditioning

Signal conditioning is required for sensor measurements or voltage inputs greater than 10 V. NI SCXI is a versatile, high-performance signal conditioning platform, optimized for high-channel-count applications. NI SCC provides portable, flexible signal conditioning options on a per-channel basis. Visit ni.com/sigcon for resources on available NI signal conditioning.

Ordering Information

For a complete list of accessories, visit the product page on ni.com.

Products	Part Number	Recommended Accessories	Part Number
NI PCI-6280
NI PCI-6280 Each NI PCI-6280 requires: 1 Cable, 1 Connector Block	779108-01	Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PXI-6280
NI PXI-6280 Each NI PXI-6280 requires: 1 Cable, 1 Connector Block	779120-01	Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PCI-6281
NI PCI-6281 Each NI PCI-6281 requires: 1 Cable, 1 Connector Block	779109-01	Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PXI-6281
NI PXI-6281 Each NI PXI-6281 requires: 1 Cable, 1 Connector Block	779121-01	Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PCI-6284
NI PCI-6284 Each NI PCI-6284 requires: 2 Cables, 2 Connector Blocks	779110-01	Connector 0:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
		Connector 1:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PXI-6284
NI PXI-6284 Each NI PXI-6284 requires: 2 Cables, 2 Connector Blocks	779122-01	Connector 0:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
		Connector 1:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PCI-6289
NI PCI-6289 Each NI PCI-6289 requires: 2 Cables, 2 Connector Blocks	779111-01	Connector 0:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
		Connector 1:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PXI-6289
NI PXI-6289 Each NI PXI-6289 requires: 2 Cables, 2 Connector Blocks	779639-01	Connector 0:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
		Connector 1:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
NI PXI-6289 for SCXI Control in PXI/SCXI Combination Chassis Each NI PXI-6289 for SCXI Control in PXI/SCXI Combination Chassis requires: 2 Cables, 2 Connector Blocks	779123-01	Connector 0:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01
		Connector 1:
		Cable: Shielded - SHC68-68-EPM Cable (2m) **Also available: Unshielded	192061-02
		Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination	776844-01

Software Recommendations

NI LabVIEW Professional Development System for Windows	Easy-to-use graphical development environment Tight integration with a wide range of measurement hardware Rapid user interface development for displaying live data Extensive signal processing, analysis, and math functionality Source code control integration and code complexity metrics Support for Windows 2000/XP/Vista/7 (32-bit) and Windows Vista/7 (64-bit)	NI LabWindows™/CVI for Windows	Real-time advanced 2D graphs and charts with support for Windows Vista/XP/2000 Complete hardware compatibility with IVI, VISA, DAQ, GPIB, and serial Analysis tools for array manipulation, signal processing statistics, and curve fitting Simplified cross-platform communication with network variables Measurement Studio .NET tools (included in LabWindows/CVI Full only) The mark LabWindows is used under a license from Microsoft Corporation.
NI LabVIEW SignalExpress for Windows	Quickly configure projects without programming Control over 400 PC-based and stand-alone instruments Log data from more than 250 data acquisition devices Perform basic signal processing, analysis, and file I/O Scale your application with automatic LabVIEW code generation Create custom reports or easily export data to LabVIEW, DIAdem or Microsoft Excel	NI Measurement Studio Professional Edition	Base analysis and instrumentation components for Microsoft Visual Basic, Visual C#, and Visual C++ Cross-platform communication with network variables Scientific user interface controls Code-generating DAQ Assistant and Instrument I/O Assistant Acquire data from GPIB, serial, Ethernet, and plug-in data acquisition devices Requires Microsoft Visual Studio 2008/2005/.NET 2003 or Visual Studio 6.0

Support and Services

System Assurance Programs

NI system assurance programs are designed to make it even easier for you to own an NI system. These programs include configuration and deployment services for your NI PXI, CompactRIO, or Compact FieldPoint system. The NI Basic System Assurance Program provides a simple integration test and ensures that your system is delivered completely assembled in one box. When you configure your system with the NI Standard System Assurance Program, you can select from available NI system driver sets and application development environments to create customized, reorderable software configurations. Your system arrives fully assembled and tested in one box with your software preinstalled. When you order your system with the standard program, you also receive system-specific documentation including a bill of materials, an integration test report, a recommended maintenance plan, and frequently asked question documents. Finally, the standard program reduces the total cost of owning an NI system by providing three years of warranty coverage and calibration service. Use the online product advisors at ni.com/advisor to find a system assurance program to meet your needs.

Calibration

NI measurement hardware is calibrated to ensure measurement accuracy and verify that the device meets its published specifications. NI offers a number of calibration services to help maintain the ongoing accuracy of your measurement hardware. These services allow you to be completely confident in your measurements, and help you maintain compliance to standards like ISO 9001, ANSI/NCSL Z540-1 and ISO/IEC 17025. To learn more about NI calibration services or to locate a qualified service center near you, contact your local sales office or visit ni.com/calibration.

Technical Support

Get answers to your technical questions using the following National Instruments resources.

Support - Visit ni.com/support to access the NI KnowledgeBase, example programs, and tutorials or to contact our applications engineers who are located in NI sales offices around the world and speak the local language.
Discussion Forums - Visit forums.ni.com for a diverse set of discussion boards on topics you care about.
Online Community - Visit community.ni.com to find, contribute, or collaborate on customer-contributed technical content with users like you.

Repair

While you may never need your hardware repaired, NI understands that unexpected events may lead to necessary repairs. NI offers repair services performed by highly trained technicians who quickly return your device with the guarantee that it will perform to factory specifications. For more information, visit ni.com/repair.

Training and Certifications

The NI training and certification program delivers the fastest, most certain route to increased proficiency and productivity using NI software and hardware. Training builds the skills to more efficiently develop robust, maintainable applications, while certification validates your knowledge and ability.

Classroom training in cities worldwide - the most comprehensive hands-on training taught by engineers.
On-site training at your facility - an excellent option to train multiple employees at the same time.
Online instructor-led training - lower-cost, remote training if classroom or on-site courses are not possible.
Course kits - lowest-cost, self-paced training that you can use as reference guides.
Training memberships and training credits - to buy now and schedule training later.

Visit ni.com/training for more information.

Extended Warranty

NI offers options for extending the standard product warranty to meet the life-cycle requirements of your project. In addition, because NI understands that your requirements may change, the extended warranty is flexible in length and easily renewed. For more information, visit ni.com/warranty.

OEM

NI offers design-in consulting and product integration assistance if you need NI products for OEM applications. For information about special pricing and services for OEM customers, visit ni.com/oem.

Alliance

Our Professional Services Team is comprised of NI applications engineers, NI Consulting Services, and a worldwide National Instruments Alliance Partner program of more than 600 independent consultants and integrators. Services range from start-up assistance to turnkey system integration. Visit ni.com/alliance.

Detailed Specifications

Specifications listed below are typical at 25 °C unless otherwise noted. Refer to the M Series User Manual for more information about NI 628x devices.

Analog Input
Number of channels
NI 6280/6281		8 differential or 16 single ended
NI 6284/6289		16 differential or 32 single ended
ADC resolution		18 bits
DNL		No missing codes guaranteed
INL		Refer to the AI Absolute Accuracy Tables
Sampling rate
Maximum		625 kS/s single channel, 500 kS/s multi-channel (aggregate)
Minimum		No minimum
Timing accuracy		50 ppm of sample rate
Timing resolution		50 ns
Input coupling		DC
Input range		±10 V, ±5 V, ± 2 V, ±1 V, ±0.5 V, ± 0.2 V, ± 0.1 V
Maximum working voltage for analog inputs (signal + common mode)		±11 V of AI GND
CMRR (DC to 60 Hz)		110 dB
Input impedance
Device on
AI+ to AI GND		>10 GΩ in parallel with 100 pF
AI- to AI GND		>10 GΩ in parallel with 100 pF
Device off
AI+ to AI GND		820 Ω
AI- to AI GND		820 Ω
Input bias current		±100 pA
Crosstalk (at 100 kHz)
Adjacent channels		-75 dB
Non-adjacent channels		-95 dB
Small signal bandwidth (-3 dB)		750 kHz filter off, 40 kHz filter on
Input FIFO size		2,047 samples
Scan list memory		4,095 entries
Data transfers
PCI/PXI devices		DMA (scatter-gather), interrupts, programmed I/O
USB devices		USB Signal Stream, programmed I/O
Overvoltage protection (AI <0..31>, AI SENSE, AI SENSE 2)
Device on		±25 V for up to eight AI pins
Device off		±15 V for up to eight AI pins
Input current during overvoltage condition		±20 mA max/AI pin
Settling Time for Multichannel Measurements

Range	Filter Off		Filter On
Range	±15 ppm of Step (±4 LSB for Full Scale Step)	±4 ppm of Step (±1 LSB for Full Scale Step)	±4 ppm of Step (±1 LSB for Full Scale Step)
±10 V, ±5 V	2 μs	8 μs	50 μs
±2 V, ±1 V, ±0.5 V	2.5 μs	8 μs	50 μs
±0.2 V, ±0.1 V	3 μs	8 μs	50 μs

Typical Performance Graphs

Analog Triggers
Number of triggers		1
Source
NI 6280/6281		AI <0..15>, APFI 0
NI 6284/6289		AI <0..31>, APFI <0..1>
Functions		Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Convert Clock, Sample Clock Timebase
Source level
AI <0..31>		±Full scale
APFI <0..1>		±10 V
Resolution		10 bits, 1 in 1024
Modes		Analog edge triggering, analog edge triggering with hysteresis, and analog window triggering
Bandwidth (-3 dB)
AI <0..31>		700 kHz filter off, 40 kHz filter on
APFI <0..1>		5 MHz
Accuracy		±1%
APFI <0..1> characteristics
Input impedance		10 kΩ
Coupling		DC
Protection
Power on		±30 V
Power off		±15 V
Analog Output
Number of channels
NI 6280/6284		0
NI 6281		2
NI 6289		4
DAC resolution		16 bits
DNL		±1 LSB
Monotonicity		16 bit guaranteed
Accuracy		Refer to the AO Absolute Accuracy Table
Maximum update rate
1 channel		2.86 MS/s
2 channels		2.00 MS/s
3 channels		1.54 MS/s
4 channels		1.25 MS/s
Timing accuracy		50 ppm of sample rate
Timing resolution		50 ns
Output range		Offset ± reference, includes ±10 V, ±5 V, ±2 V, and ±1 V calibrated ranges
Offset		0 V, 5 V, APFI <0..1>, AO <0..3>¹
Reference		10 V, 5 V, 2 V, 1 V, APFI <0..1>, AO <0..3>¹
Maximum output level		±11 V
Output coupling		DC
Output impedance		0.2 Ω
Output current drive		±5 mA
Overdrive protection		±25 V
Overdrive current		20 mA
Power-on state		±5 mV²
Power-on glitch		2.3 V peak for 1.2 s
Output FIFO size		8,191 samples shared among channels used
Data transfers
PCI/PXI devices		DMA (scatter-gather), interrupts, programmed I/O
USB devices		USB Signal Stream, programmed I/O
AO waveform modes: Non-periodic waveform Periodic waveform regeneration mode from onboard FIFO Periodic waveform regeneration from host buffer including dynamic update
Settling time, full scale step 15 ppm (1 LSB)		3 μs
Slew rate		20 V/μs
Glitch energy at midscale transition, ±10 V range
Magnitude		15 mV
Duration		0.5 μs
¹ An AO channel cannot be a reference or offset to itself. ² For all USB-6281/6289 Screw Terminal devices, when powered on, the analog output signal is not defined until after USB configuration is complete.
External Reference
APFI <0..1> characteristics
Input impedance		10 kΩ
Coupling		DC
Protection
Power on		±30 V
Power off		±15 V
Range		±11 V

Calibration (AI and AO)
Recommended warm-up time
PCI/PXI devices		15 minutes
USB devices		30 minutes
Calibration interval		2 years

Nominal Range		Residual Gain Error (ppm of Reading)	Gain Tempco (ppm/°C)	Reference Tempco	Residual Offset Error (ppm of Range)	Offset Tempco (ppm of Range/°C)	INL Error (ppm of Range)	Random Noise, σ (µVrms)	Absolute Accuracy at Full Scale¹ (µV)	Sensitivity² (µV)
AI Absolute Accuracy Table (Filter On)
Positive Full Scale	Negative Full Scale	Residual Gain Error (ppm of Reading)	Gain Tempco (ppm/°C)	Reference Tempco	Residual Offset Error (ppm of Range)	Offset Tempco (ppm of Range/°C)	INL Error (ppm of Range)	Random Noise, σ (µVrms)	Absolute Accuracy at Full Scale¹ (µV)	Sensitivity² (µV)
10	-10	40	17	1	8	11	10	60	980	24
5	-5	45	17	1	8	11	10	30	510	12
2	-2	45	17	1	8	13	10	12	210	4.8
1	-1	55	17	1	15	15	10	7	120	2.8
0.5	-0.5	55	17	1	30	20	10	4	70	1.6
0.2	-0.2	75	17	1	45	35	10	3	39	1.2
0.1	-0.1	120	17	1	60	60	10	2	28	0.8
Accuracies listed are valid for up to two years from the device external calibration. AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) + NoiseUncertainty GainError = ResidualAIGainError + GainTempco · (TempChangeFromLastInternalCal) + ReferenceTempco · (TempChangeFromLastExternalCal) OffsetError = ResidualAIOffsetError + OffsetTempco · (TempChangeFromLastInternalCal) + INL_Error ¹ Absolute accuracy at full scale on the analog input channels is determined using the following assumptions: TempChangeFromLastExternalCal = 10 °C TempChangeFromLastInternalCal = 1 °C number_of_readings = 100 CoverageFactor = 3 σ For example, on the 10 V range, the absolute accuracy at full scale is as follows: GainError = 40 ppm + 17 ppm · 1 + 1 ppm · 10 GainError = 67 ppm OffsetError = 8 ppm + 11 ppm · 1 + 10 ppm OffsetError = 29 ppm AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty AbsoluteAccuracy = 980 μV ² Sensitivity is the smallest voltage change that can be detected. It is a function of noise.

Nominal Range		Residual Gain Error (ppm of Reading)	Gain Tempco (ppm/°C)	Reference Tempco	Residual Offset Error (ppm of Range)	Offset Tempco (ppm of Range/°C)	INL Error (ppm of Range)	Random Noise, σ (µVrms)	Absolute Accuracy at Full Scale¹ (µV)	Sensitivity² (µV)
AI Absolute Accuracy Table (Filter Off)
Positive Full Scale	Negative Full Scale	Residual Gain Error (ppm of Reading)	Gain Tempco (ppm/°C)	Reference Tempco	Residual Offset Error (ppm of Range)	Offset Tempco (ppm of Range/°C)	INL Error (ppm of Range)	Random Noise, σ (µVrms)	Absolute Accuracy at Full Scale¹ (µV)	Sensitivity² (µV)
10	-10	45	17	1	10	11	10	70	1050	28.0
5	-5	50	17	1	10	11	10	35	550	14.0
2	-2	50	17	1	10	13	10	15	230	6.0
1	-1	60	17	1	17	15	10	12	130	4.8
0.5	-0.5	60	17	1	32	20	10	10	80	4.0
0.2	-0.2	80	17	1	47	35	10	9	43	3.6
0.1	-0.1	120	17	1	62	60	10	9	31	3.6
Accuracies listed are valid for up to two years from the device external calibration. AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) + NoiseUncertainty GainError = ResidualAIGainError + GainTempco · (TempChangeFromLastInternalCal) + ReferenceTempco · (TempChangeFromLastExternalCal) OffsetError = ResidualAIOffsetError + OffsetTempco · (TempChangeFromLastInternalCal) + INL_Error ¹ Absolute accuracy at full scale on the analog input channels is determined using the following assumptions: TempChangeFromLastExternalCal = 10 °C TempChangeFromLastInternalCal = 1 °C number_of_readings = 100 CoverageFactor = 3 σ For example, on the 10 V range, the absolute accuracy at full scale is as follows: GainError = 45 ppm + 17 ppm · 1 + 1 ppm · 10 GainError = 72 ppm OffsetError = 10 ppm + 11 ppm · 1 + 10 ppm OffsetError = 31 ppm AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty AbsoluteAccuracy = 1050 μV ² Sensitivity is the smallest voltage change that can be detected. It is a function of noise.

Nominal Range		Residual Gain Error (ppm of Reading)	Gain Tempco (ppm/°C)	Reference Tempco	Residual Offset Error (ppm of Range)	Offset Tempco (ppm of Range/°C)	INL Error (ppm of Range)	Absolute Accuracy at Full Scale¹ (µV)
AO Absolute Accuracy Table
Positive Full Scale	Negative Full Scale	Residual Gain Error (ppm of Reading)	Gain Tempco (ppm/°C)	Reference Tempco	Residual Offset Error (ppm of Range)	Offset Tempco (ppm of Range/°C)	INL Error (ppm of Range)	Absolute Accuracy at Full Scale¹ (µV)
10	-10	55	15	1	30	12	32	1540
5	-5	60	15	1	30	17	32	820
2	-2	65	25	1	40	30	32	404
1	-1	85	25	1	57	50	32	259
¹ Absolute Accuracy at full scale numbers is valid immediately following internal calibration and assumes the device is operating within 10 °C of the last external calibration. Accuracies listed are valid for up to two years from the device external calibration. AbsoluteAccuracy = OutputValue · (GainError) + Range · (OffsetError) GainError = ResidualGainError + GainTempco · (TempChangeFromLastInternalCal) + ReferenceTempco · (TempChangeFromLastExternalCal) OffsetError = ResidualOffsetError + AOOffsetTempco · (TempChangeFromLastInternalCal) + INL_Error

Digital I/O/PFI
Static Characteristics
Number of channels
NI 6280/6281		24 total 8 (P0.<0..7>) 16 (PFI <0..7>/P1, PFI <8..15>/P2)
NI 6284/6289		48 total 32 (P0.<0..31>) 16 (PFI <0..7>/P1, PFI <8..15>/P2)
I/O type		5 V TTL/CMOS compatible
Ground reference		D GND
Direction control		Each terminal individually programmable as input or output
Pull-down resistor		50 kΩ typical, 20 kΩ minimum
Input voltage protection³		±20 V on up to two pins
³ Stresses beyond those listed under Input voltage protection may cause permanent damage to the device.
Waveform Characteristics (Port 0 Only)
Terminals used
NI 6280/6281		Port 0 (P0.<0..7>)
NI 6284/6289		Port 0 (P0.<0..31>)
Port/sample size
NI 6280/6281		Up to 8 bits
NI 6284/6289		Up to 32 bits
Waveform generation (DO) FIFO		2,047 samples
Waveform acquisition (DI) FIFO		2,047 samples
DI Sample Clock frequency
PCI/PXI devices		0 to 10 MHz⁴
USB devices		0 to 1 MHz system dependent⁴
DO Sample Clock frequency
PCI/PXI devices
Regenerate from FIFO		0 to 10 MHz
Streaming from memory		0 to 10 MHz system dependent⁴
USB devices
Regenerate from FIFO		0 to 10 MHz
Streaming from memory		0 to 1 MHz system dependent⁴
Data transfers
PCI/PXI devices		DMA (scatter-gather), interrupts, programmed I/O
USB devices		USB Signal Stream, programmed I/O
DO or DI Sample Clock source⁵		Any PFI, RTSI, AI Sample or Convert Clock, AO Sample Clock, Ctr n Internal Output, and many other signals
⁴ Performance can be dependent on bus latency and volume of bus activity. ⁵ The digital subsystem does not have its own dedicated internal timing engine. Therefore, a sample clock must be provided from another subsystem on the device or an external source.
PFI/Port 1/Port 2 Functionality
Functionality		Static digital input, static digital output, timing input, timing output
Timing output sources		Many AI, AO, counter, DI, DO timing signals
Debounce filter settings		125 ns, 6.425 µs, 2.56 ms, disable; high and low transitions; selectable per input

Level	Min	Max
Recommended Operation Conditions
Input high voltage (V_IH)	2.2 V	5.25 V
Input low voltage (V_IL)	0 V	0.8 V
Output high current (I_OH) P0.<0..31> PFI <0..15>/P1/P2	— —	-24 mA -16 mA
Output low current (I_OL) P0.<0..31> PFI <0..15>/P1/P2	— —	24 mA 16 mA

Level	Min	Max
Electrical Characteristics
Positive-going threshold (VT+) Negative-going threshold (VT-)	— 0.8 V	2.2 V —
Delta VT hysteresis (VT+ - VT-)	0.2 V	—
I_IL input low current (V_in = 0 V) I_IH input high current (V_in = 5 V)	— —	-10 µA 250 µA

Digital I/O Characteristics

General-Purpose Counter/Timers
Number of counter/timers		2
Resolution		32 bits
Counter measurements		Edge counting, pulse, semi-period, period, two-edge separation
Position measurements		X1, X2, X4 quadrature encoding with Channel Z reloading; two-pulse encoding
Output applications		Pulse, pulse train with dynamic updates, frequency division, equivalent time sampling
Internal base clocks		80 MHz, 20 MHz, 0.1 MHz
External base clock frequency		0 MHz to 20 MHz
Base clock accuracy		50 ppm
Inputs		Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down
Routing options for inputs		Any PFI, RTSI, PXI_TRIG, PXI_STAR, analog trigger, many internal signals
FIFO		2 samples
Data transfers
PCI/PCIe/PXI/PXIe devices		Dedicated scatter-gather DMA controller for each counter/timer; interrupts, programmed I/O
USB devices		USB Signal Stream, programmed I/O
Frequency Generator
Number of channels		1
Base clocks		10 MHz, 100 kHz
Divisors		1 to 16
Base clock accuracy		50 ppm
Output can be available on any PFI or RTSI terminal.
Phase-Locked Loop (PLL) (PCI/PXI Devices Only)
Number of PLLs		1
Reference signal		PXI_STAR, PXI_CLK10, RTSI <0..7>
Output of PLL		80 MHz Timebase; other signals derived from 80 MHz Timebase including 20 MHz and 100 kHz Timebases
External Digital Triggers
Source		Any PFI, RTSI, PXI_TRIG, PXI_STAR
Polarity		Software-selectable for most signals
Analog input function		Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Convert Clock, Sample Clock Timebase
Analog output function		Start Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase
Counter/timer functions		Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down
Digital waveform generation (DO) function		Sample Clock
Digital waveform acquisition (DI) function		Sample Clock
Device-To-Device Trigger Bus
PCI devices		RTSI <0..7>⁶
PXI devices		PXI_TRIG <0..7>, PXI_STAR
USB devices		None
Output selections		10 MHz Clock; frequency generator output; many internal signals
Debounce filter settings		125 ns, 6.425 µs, 2.56 ms, disable; high and low transitions; selectable per input
⁶ In other sections of this document, RTSI refers to RTSI <0..7> for PCI devices or PXI_TRIG <0..7> for PXI devices.
Bus Interface
PCI/PXI devices		3.3 V or 5 V signal environment
USB devices		USB 2.0 Hi-Speed or full-speed^7,8
DMA channels (PCI/PXI devices)		6, analog input, analog output, digital input, digital output, counter/timer 0, counter/timer 1
USB Signal Stream (USB devices)		4, can be used for analog input, analog output, digital input, digital output, counter/timer 0, counter/timer 1
All PXI-628x devices support one of the following features: May be installed in PXI Express hybrid slots Or, may be used to control SCXI in PXI/SCXI combo chassis

Table 1. PXI/SCXI Combo and PXI Express Chassis Compatibility

M Series Device	M Series Part Number	SCXI Control in PXI/SCXI Combo Chassis	PXI Express Hybrid Slot Compatible
PXI-6280	191501C-04	No	Yes
PXI-6281	191501C-03	No	Yes
PXI-6284	191501C-02	No	Yes
PXI-6289	191501C-01	No	Yes
PXI-6289	191501C-11	Yes	No
Earlier versions of PXI-628x	191501A-0x 191501B-0x	Yes	No

⁷ If you are using a USB M Series device in full-speed mode, device performance will be lower and you will not be able to achieve maximum sampling/update rates. ⁸ Operating on a full-speed bus may result in lower performance.
Power Requirements
PCI/PXI devices
Current draw from bus during no-load condition⁹
+5 V		0.03 A
+3.3 V		0.78 A
+12 V		0.40 A
-12 V		0.06 A
PCI/PXI devices
Current draw from bus during AI and AO overvoltage condition⁹
+5 V		0.03 A
+3.3 V		1.26 A
+12 V		0.43 A
-12 V		0.06 A

Caution USB-628x devices must be powered with NI offered AC adapter or a National Electric Code (NEC) Class evice and has appropriate safety certification marks for country of use.

USB devices
Power supply requirements		11 to 30 VDC, 20 W, locking or non-locking power jack with 0.080 in. diameter center pin, 5/16-32 thread for locking collars
Power supply fuse		2 A, 250 V
⁹ Does not include P0/PFI/P1/P2 and +5 V terminals.
Power Limits
Caution Exceeding the power limits may cause unpredictable behavior by the device and/or PC/chassis.
PCI devices
+5 V terminal (connector 0)		1 A max¹⁰
+5 V terminal (connector 1)		1 A max¹⁰
PXI devices
+5 V terminal (connector 0)		1 A max¹⁰
+5 V terminal (connector 1)		1 A max¹⁰
P0/PFI/P1/P2 and +5 V terminals combined		2 A max
USB devices
+5 V terminal		1 A max¹¹
P0/PFI/P1/P2 and +5 V terminals combined		2 A max
¹⁰ Older revisions have a self-resetting fuse that opens when current exceeds this specification. Newer revisions have a traditional fuse that opens when current exceeds this specification. This fuse is not customer-replaceable; if the fuse permanently opens, return the device to NI for repair. ¹¹ Has a self-resetting fuse that opens when current exceeds this specification.
Physical Requirements
Printed circuit board dimensions
NI PCI-6280/6281/6284/6289		10.6 cm x 15.5 cm (4.2 in. x 6.1 in.)
NI PXI-6280/6281/6284/6289		Standard 3U PXI
Enclosure dimensions (includes connectors)
NI USB-6281/6289 Mass Termination		18.8 x 17.09 x 4.45 cm (7.4 x 6.73 x 1.75 in.)
NI USB-6281/6289 Screw Terminal		26.67 x 17.09 x 4.45 cm (10.5 x 6.73 x 1.75 in.)
NI USB-6258/6289 OEM		Refer to the NI USB-622x/625x/628x OEM User Guide
Weight
NI PCI-6280		151 g (5.3 oz)
NI PCI-6281		158 g (5.6 oz)
NI PCI-6284		159 g (5.6 oz)
NI PCI-6289		167 g (5.9 oz)
NI PXI-6280		218 g (7.7 oz)
NI PXI-6281		225 g (7.9 oz)
NI PXI-6284		229 g (8.1 oz)
NI PXI-6289		237 g (8.4 oz)
NI USB-6281 Mass Termination		1.04 kg (2 lb 4.5 oz)
NI USB-6289 Mass Termination		1.06 kg (2 lb 5.5 oz)
NI USB-6281 OEM		261 g (9.2 oz)
NI USB-6289 OEM		274 g (9.6 oz)
NI USB-6281 Screw Terminal		1.46 kg (3 lb 3.4 oz)
NI USB-6289 Screw Terminal		1.52 kg (3 lb 5.5 oz)
I/O connector
NI PCI/PXI-6280/6281		1 68-pin VHDCI
NI PCI/PXI-6284/6289		2 68-pin VHDCI
NI USB-6281 Mass Termination		1 68-pin SCSI
NI USB-6289 Mass Termination		2 68-pin SCSI
NI USB-6281 OEM		1 34-pin IDC, 1 50-pin IDC
NI USB-6289 OEM		2 34-pin IDC, 2 50-pin IDC
NI USB-6281 Screw Terminal		64 screw terminals
NI USB-6289 Screw Terminal		128 screw terminals
USB-6281/6289 Screw Terminal wiring		16-28 AWG
Maximum Working Voltage¹²
NI 6280/6281/6284/6289 channel-to-earth		11 V, Measurement Category I
Caution Do not use for measurements within Categories II, III, or IV.
¹² Maximum working voltage refers to the signal voltage plus the common-mode voltage.
Environmental
Operating temperature
PCI/PXI devices		0 to 55 °C
USB devices		0 to 45 °C
Storage temperature		-20 to 70 °C
Humidity		10 to 90% RH, noncondensing
Maximum altitude		2,000 m
Pollution Degree (indoor use only)		2
Shock and Vibration (PXI Devices Only)
Operational shock		30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC-60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.)
Random vibration
Operating		5 to 500 Hz, 0.3 g_rms
Nonoperating		5 to 500 Hz, 2.4 g_rms (Tested in accordance with IEC-60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F, Class 3.)

Safety
This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use:
IEC 61010-1, EN 61010-1 UL 61010-1, CSA 61010-1
Note For UL and other safety certifications, refer to the product label or the Online Product Certification section
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:
EN 61326 (IEC 61326): Class A emissions; Basic immunity EN 55011 (CISPR 11): Group 1, Class A emissions AS/NZS CISPR 11: Group 1, Class A emissions FCC 47 CFR Part 15B: Class A emissions ICES-001: Class A emissions
Note For the standards applied to assess the EMC of this product, refer to the Online Product Certification section.
Note For EMC compliance, operate this product according to the documentation.
Note For EMC compliance, operate this device with shielded cables.
CE Compliance
This product meets the essential requirements of applicable European Directives as follows:
2006/95/EC; Low-Voltage Directive (safety) 2004/108/EC; Electromagnetic Compatibility Directive (EMC)
Online Product Certification
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column.
Environmental Management
NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers. For additional environmental information, refer to the NI and the Environment Web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.
Waste Electrical and Electronic Equipment (WEEE)
EU Customers At the end of their life cycle, all products must be sent to a WEEE recycling center. For more information about WEEE recycling centers and National Instruments WEEE initiatives, visit ni.com/environment/weee.htm.

Pinouts/Front Panel Connections

NI PCI/PXI-6280 Pinout

NI PCI/PXI-6281 Pinout

NI PCI/PXI-6284 Pinout

NI PCI/PXI-6289 Pinout

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