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Requirements and Compatibility | | |

For user manuals and dimensional drawings, visit the product page resources tab on ni.com.

Last Revised: 2011-10-21 10:32:43.0

High-Speed M Series Multifunction Data Acquisition - 16-Bit, up to 1.25 MS/s, up to 80 Analog

Inputs

Technical Sales

United States

(866) 531-6285 [email protected]

16, 32, or 80 analog inputs at 16 bits, 1.25 MS/s (1 MS/s scanning, NI 6255 specified at 750 kS/s scanning)

Up to 4 analog outputs at 16 bits, 2.8 MS/s (2 μs full-scale settling)

7 programmable input ranges (±100 mV to ±10 V) per channel

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

X1, X2, or X4 quadrature encoder inputs

2-year calibration interval

Overview

NI M Series high-speed multifunction data acquisition (DAQ) devices are optimized for superior accuracy at fast sampling rates. These devices have NI-MCal calibration technology for improved measurement accuracy and six DMA channels for high-speed data throughput. They have an onboard NI-PGIA 2 amplifier designed for fast settling times at high scanning rates, ensuring 16-bit accuracy even when measuring all channels at maximum speeds. All high-speed devices have a minimum of 16 analog inputs, 24 digital

I/O lines, seven programmable input ranges, analog and digital triggering, two counter/timers, and an extended two-year calibration interval.

NI recommends high-accuracy M Series devices (NI 628x) for 5X more measurement sensitivity or industrial M Series devices (NI 623x) for 60 VDC isolation and superior noise rejection.

See the NI USB-625x data sheet for information specific to USB M Series devices.

Back to Top

Requirements and Compatibility

OS Information

Windows 2000/XP

Windows Vista x64/x86

Linux®

Mac OS X

Windows 7

Driver Information

NI-DAQmx

NI-DAQmx Base

Software Compatibility

ANSI C/C++

LabVIEW

LabVIEW SignalExpress

LabWindows/CVI

Visual Studio .NET

Back to Top

Comparison Tables

Family Bus

Analog

Inputs

AI Resolution

(bits)

Analog

Outputs

AO

Resolution

Max Update Rate

(MS/s)

AO

Range

(V)

Digital

I/O

Correlated

(clocked) DIO

www.ni.com

Family Bus

NI 6250

NI 6251

NI 6254

PCI, PXI

PCI, PCI Express, PXI, PXI

Express, USB

PCI, PXI

NI 6255 PCI, PXI, USB

NI 6259

PCI, PCI Express, PXI, PXI

Express, USB

Analog

Inputs

AI Resolution

(bits)

Analog

Outputs

AO

Resolution

Max Update Rate

(MS/s)

AO

Range

(V)

Digital

I/O

16

16

32

80

32

16

16

16

16

16

0

2

0

2

4

-

16

-

16

16

-

2.8

-

2.8

2.8

-

±10, ±5,

±ext ref

-

±10, ±5,

±ext ref

±10, ±5,

±ext ref

48

24

24

48

24

Correlated

(clocked) DIO

8, up to 10 MHz

8, up to 10 MHz

32, up to 10 MHz

8, up to 10 MHz

32, up to 10 MHz

Back to Top

Application and Technology

M Series for Test

For test, you can use M Series high-speed analog inputs and 10 MHz digital lines with NI signal conditioning for applications including electronics test, component characterization, and sensor measurements. High-speed 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 provide 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. High-speed M Series devices also have direct support for quadrature encoder measurements, protected digital lines, and digital debounce filters for control applications. With up to 80 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

You can use the wide range of I/O – from 80 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, thus bridging the gap between test, control, and design applications.

M Series Performance on PCI Express

National Instruments was the first company to empower engineers and scientists to use the PCI Express and PXI Express buses for data acquisition. PCI Express M Series boards contain six DMA channels to maximize data throughput without using PC processing time. The PCI Express bus delivers the highest bandwidth compared to any other PC bus, and it eliminates throughput bottlenecks by providing 250 MB/s per-direction bandwidth across the x1 (“by one”) lane for increased data transfer. Each slot allocates dedicated bandwidth, meaning that multiple PCI Express boards do not share bandwidth for data transfer. With this improvement over the shared-bandwidth PCI architecture, all onboard I/O runs simultaneously while data is transferred to and from PC memory across the bus. The PXI Express specifications integrate PCI Express signaling into the PXI

Standard, which increases backplane bandwidth from 132 MB/s to 6 GB/s, a 45 times improvement. Both PCI Express and PXI Express facilitate a smooth transition to new hardware by providing complete backward compatibility to software written for applications that use PCI or PXI, respectively.

Hybrid-Slot-Compatible PXI Modules

PXI M Series modules 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 (PXI-1010, PXI-1011, PXI-1050, and PXI-1052). For these applications, NI provides unmodified PXI M Series 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.

Industrial Data Acquisition

When you need performance and accuracy from a data acquisition device in an electrically noisy or harsh environment, consider National Instruments industrial M Series devices

(NI 623x). NI industrial DAQ devices offer a set of high-reliability features, including isolation, ±20 mA current I/O, 24 V digital logic levels, and digital debounce filters. Isolation prevents ground loops, rejects high common-mode voltages, and protects users and equipment from high-voltage transients. Four to 20 mA current loops are immune to most sources of electrical noise and voltage (IR) drops along extensive cable lengths. Sourcing or sinking 24 V digital I/O interfaces directly with pumps, valves, relays, and other industry-standard sensors and actuators, and programmable debounce filters remove glitches and spikes from switches and relays connected to digital input lines.

Simultaneous and Intelligent Data Acquisition

When you need to obtain performance from a data acquisition device beyond the capabilities of a multifunction data acquisition device, National Instruments provides simultaneous sampling with NI S Series and intelligent data acquisition with NI R Series. The S Series architecture dedicates an analog-to-digital converter (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 field-programmable gate array (FPGA) that is reconfigurable using the LabVIEW FPGA

Module.

www.ni.com

They combine analog input, analog output, and digital I/O on a single device. 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.

Recommended Accessories

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.

Recommended Driver Software

National Instruments measurement services software, built around NI-DAQmx driver software, includes intuitive application programming interfaces, configuration tools, I/O assistants, and other tools designed to reduce system setup, configuration, and development time. National Instruments recommends using the latest version of NI-DAQmx driver software for application development in NI LabVIEW, LabVIEW SignalExpress, LabWindows™/CVI, and Measurement Studio software. To obtain the latest version of NI-DAQmx, visit

ni.com/support/daq/versions

. NI measurement services software speeds up your development with features including the following:

A guide to create fast and accurate measurements with no programming using the DAQ Assistant

Automatic code generation to create your application in LabVIEW; LabWindows/CVI; LabVIEW SignalExpress; and C#, Visual Studio .NET, ANSI C/C++, or Visual Basic using

Measurement Studio

Multithreaded streaming technology for 1,000 times performance improvements

Automatic timing, triggering, and synchronization routing to make advanced applications easy

Thousands of free software downloads available at

ni.com/zone

to jump-start your project

Software configuration of all digital I/O features without hardware switches/jumpers

Single programming interface for analog input, analog output, digital I/O, and counters on hundreds of multifunction data acquisition hardware devices

M Series devices are compatible with the following versions (or later) of NI application software – LabVIEW, LabWindows/CVI, or Measurement Studio versions 7.x; and LabVIEW

SignalExpress 2.x.

Back to Top

Ordering Information

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

Part Number Products

NI PCI-6250

NI PCI-6250

Requires: 1 Cables , 1 Connector Blocks

779069-01

Recommended Accessories

Cables: Shielded - SHC68-68-EPM Cable (2m)

**Also Available: Unshielded

Connector Blocks: Spring-Screw_Terminals - SCB-68

**Also Available: BNC_Terminals, Custom

NI PXI-6250

NI PXI-6250

Requires: 1 Cable , 1 Connector Block

779116-01 Cable: Shielded - SHC68-68-EPM Cable (2m)


Connector Block: Spring-Screw_Terminals - SCB-68


NI PCI-6251

NI PCI-6251


779070-01 Cables: Shielded - SHC68-68-EPM Cable (2m)




NI PCIe-6251

NI PCIe-6251






NI PXI-6251

NI PXI-6251

Requires: 1 Cables , 1 Connector Block





NI PXIe-6251

NI PXIe-6251






NI PCI-6254

NI PCI-6254

779071-01

Part Number

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

www.ni.com


NI PXI-6254

NI PXI-6254


NI PCI-6255

NI PCI-6255


NI PXI-6255

NI PXI-6255


NI PCI-6259

NI PCI-6259


NI PCIe-6259

NI PCIe-6259


779118-01

779546-01

779547-01

779072-01

779513-01

Connector 0:




**Also Available: BNC_Terminals

Connector 1:





Connector 0:





Connector 1:





Connector 0:





Connector 1:

Cables: Shielded - SHC68-68 Cable (2m)




Connector 0:





Connector 1:

Cables: Shielded - SHC68-68 Cable (2m)




Connector 0:





Connector 1:





Connector 0:



192061-02

776844-01

191945-02

776844-01

192061-02

776844-01

191945-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

776844-01

192061-02

www.ni.com



Connector 1:





776844-01

192061-02

776844-01

NI PXI-6259

NI PXI-6259


779632-01

Connector 0:





Connector 1:





192061-02

776844-01

192061-02

776844-01

NI PXIe-6259

NI PXIe-6259


779778-01

Connector 0:





Connector 1:





192061-02

776844-01

192061-02

776844-01

Back to Top

Software Recommendations

LabVIEW Professional

Development System for

Windows

Advanced software tools for large project development

Automatic code generation using DAQ

Assistant and Instrument I/O Assistant

Tight integration with a wide range of hardware

Advanced measurement analysis and digital signal processing

Open connectivity with DLLs, ActiveX, and

.NET objects

Capability to build DLLs, executables, and

MSI installers

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 LabWindows™/CVI for

Windows

Real-time advanced 2D graphs and charts

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 Measurement Studio

Professional Edition

Support for Microsoft Visual Studio .NET

2010/2008/2005

Customizable Windows Forms and Web

Forms controls for test and measurement user interface design

Hardware integration support with data acquisition and instrument control libraries

Automatic code generation with data acquisition, instrument control, and parameter assistants

Cross-platform communication with network variables

Analysis libraries for array operations, signal generation, windowing, filters, signal processing

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www.ni.com

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.

Back to Top

Detailed Specifications

Specifications listed below are typical at 25 °C unless otherwise noted. Refer to the

M Series User Manual x

Analog Input

Number of channels

NI 6250/6251

NI 6254/6259

NI 6255

ADC resolution

DNL

8 differential or 16 single ended



16 bits

No missing codes guaranteed

www.ni.com

INL

Sampling rate

Maximum

NI 6250/6251/6254/6259

NI 6255

Minimum

Timing accuracy

Timing resolution

Input coupling

Input range

Maximum working voltage for analog inputs (signal + common mode)

CMRR (DC to 60 Hz)

Input impedance

Device on

AI+ to AI GND

AI- to AI GND

Device off

Refer to the AI Absolute Accuracy Table

1.25 MS/s single channel,

1.00 MS/s multi-channel (aggregate)

1.25 MS/s single channel

750 kS/s multi-channel (aggregate)

No minimum

50 ppm of sample rate

50 ns

DC

±10 V, ±5 V, ±2 V, ±1 V, ±0.5 V, ±0.2 V, ±0.1 V

±11 V of AI GND

100 dB

>10 GΩ in parallel with 100 pF

>10 GΩ in parallel with 100 pF

AI+ to AI GND

AI- to AI GND

Input bias current

Crosstalk (at 100 kHz)

Adjacent channels

Non-adjacent channels

820 Ω

820 Ω

±100 pA

-75 dB

-90 dB

1

1.7 MHz

4,095 samples

Small signal bandwidth (-3 dB)

Input FIFO size

Scan list memory

Data transfers

PCI/PCIe/PXI/PXIe devices

USB devices

Overvoltage protection (AI <0..79>, AI SENSE, AI SENSE 2)

4,095 entries

DMA (scatter-gather), interrupts, programmed I/O

USB Signal Stream, programmed I/O

Device on

Device off

±25 V for up to four AI pins

±15 V for up to four AI pins

Input current during overvoltage condition ±20 mA max/AI pin

1

x

Settling Time for Multichannel Measurements

NI 6250/6251/6254/6259

±60 ppm

Range of

Step

(±4

LSB for

Full Full

Scale Scale

Step) Step)

±15 ppm of

Step

(±1

LSB for

±10 V,

±5 V,

±2 V,

±1 V

1 µs

1.5

µs

x

www.ni.com

±0.5 V 1.5

µs

±0.2

V,

±0.1 V

2 µs

2 µs 8 µs

NI 6255

Range

±10 V, ±5 V, ±2 V, ±1 V

±0.5 V

±0.2 V, ±0.1 V

Typical Performance Graphs

±60 ppm of Step (±4 LSB for Full Scale Step)

1.3 µs

1.8 µs

3 µs

±15 ppm of Step (±1 LSB for Full Scale Step)

1.6 µs

2.5 µs

8 µs

Analog Triggers

Number of triggers

Source

NI 6250/6251

NI 6254/6259

NI 6255

Functions

Source level

AI <0..79>

APFI <0..1>

Resolution

Modes

Bandwidth (-3 dB)

AI <0..79>

APFI <0..1>

1

AI <0..15>, APFI 0

AI <0..31>, APFI <0..1>

AI <0..79>, APFI 0

Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Convert Clock,

Sample Clock Timebase

±full scale

±10 V

10 bits, 1 in 1,024

Analog edge triggering, analog edge triggering with hysteresis, and analog window triggering

3.4 MHz

3.9 MHz

www.ni.com

Accuracy

APFI <0..1> characteristics

Input impedance

Coupling

Protection

Power on

Power off

Analog Output

±1%

10 kΩ

DC

±30 V

±15 V

Number of channels

NI 6250/6254

NI 6251/6255

NI 6259

DAC resolution

DNL

Monotonicity

Accuracy

Maximum update rate

1 channel

2 channels

3 channels

4 channels

Timing accuracy

Timing resolution

Output range

Output coupling

Output impedance

Output current drive

Overdrive protection

Overdrive current

Power-on state

Power-on glitch

Output FIFO size

Data transfers


USB devices

AO waveform modes:

0

2

4

16 bits

±1 LSB

16 bit guaranteed

Refer to the AO Absolute Accuracy Table

2.86 MS/s

2.00 MS/s

1.54 MS/s

1.25 MS/s

50 ppm of sample rate

50 ns

±10 V, ±5 V, ±external reference on APFI <0..1>

DC

0.2 Ω

±5 mA

±25 V

20 mA

±5 mV

2

1.5 V peak for 1.5 s

8,191 samples shared among channels used



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)

Slew rate

2 µs

20 V/µs

Glitch energy at midscale transition, ±10 V range

Magnitude

Duration

10 mV

1 µs

2

For all USB-6251/6259 Screw Terminal devices, when powered on, the analog output signal is not defined until after USB configuration is complete.

External Reference

www.ni.com

APFI <0..1> characteristics

Input impedance

Coupling

Protection

Power on

Power off

Range

Slew rate

10 kΩ

DC

±30 V

±15 V

±11 V

20 V/µs

Calibration (AI and AO)

Recommended warm-up time

Calibration interval

15 minutes

2 years

AI Absolute Accuracy Table

Nominal Range

Positive

Full

Scale

0.5

0.2

0.1

2

1

10

5

Negative

Full

Scale

-10

-5

-2

-1

- 0.5

- 0.2

- 0.1

Residual

Gain

Error

(ppm of

Reading)

60

70

70

80

90

130

150

Gain

Tempco

(ppm/°C)

13

13

13

13

13

13

13

Reference

Tempco

1

1

1

1

1

1

1

Accuracies listed are valid for up to two years from the device external calibration.

Residual

Offset

Error

(ppm of

Range)

20

20

20

20

40

80

150

Offset

Tempco

(ppm of

Range/°C)

34

55

90

21

21

24

27

INL Error

(ppm of

Range)

60

60

60

60

60

60

60

Random

Noise,

σ (µVrms)

280

140

57

32

21

16

15

AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) + NoiseUncertainty

GainError = ResidualAIGainError + GainTempco · (TempChangeFromLastInternalCal) + ReferenceTempco · (TempChangeFromLastExternalCal)

OffsetError = ResidualAIOffsetError + OffsetTempco · (TempChangeFromLastInternalCal) + INL_Error

Absolute

Accuracy at

Full

1,920

1,010

410

220

130

74

52

Sensitivity

2

(µV)

112.0

56.0

22.8

12.8

8.4

6.4

6.0

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 = 60 ppm + 13 ppm · 1 + 1 ppm · 10 GainError = 83 ppm

OffsetError = 20 ppm + 21 ppm · 1 + 60 ppm OffsetError = 101 ppm

www.ni.com

AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty AbsoluteAccuracy = 1920 µV

2

Sensitivity is the smallest voltage change that can be detected. It is a function of noise.

AO Absolute Accuracy Table

Nominal Range

Positive

Full

Scale

10

5

Negative

Full

Scale

-10

-5

Residual

Gain Error

(ppm of

Reading)

75

85

Gain

Tempco

(ppm/°C)

17

8

Reference

Tempco

1

1

Residual

Offset Error

(ppm of

Range)

40

40

Offset

Tempco

(ppm of

Range/°C)

2

2

INL

Error

(ppm of

Range)

64

64

Absolute

Accuracy at

Full

Scale

1

(µV)

2,080

1,045

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 6250/6251/6255

NI 6254/6259

Ground reference

Direction control

24 total, 8 (P0.<0..7>), 16 (PFI <0..7>/P1, PFI <8..15>/P2)

48 total, 32 (P0.<0..31>), 16 (PFI <0..7>/P1, PFI <8..15>/P2)

D GND

Each terminal individually programmable as input or output

Pull-down resistor

Input voltage protection

3

50 kΩ typ, 20 kΩ min

±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 6250/6251/6255

NI 6254/6259

Port/sample size

NI 6250/6251/6255

NI 6254/6259

Waveform generation (DO) FIFO

Waveform acquisition (DI) FIFO

DI Sample Clock frequency


USB devices

DO Sample Clock frequency


Regenerate from FIFO

Streaming from memory

USB devices

Regenerate from FIFO

Streaming from memory

Data transfers

Port 0 (P0.<0..7>)

Port 0 (P0.<0..31>)

Up to 8 bits

Up to 32 bits

2,047 samples

2,047 samples

0 to 10 MHz

4

0 to 1 MHz system dependent

4

0 to 10 MHz


4

0 to 10 MHz


4

www.ni.com


USB devices



DO or DI Sample Clock source

5 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

Timing output sources

Debounce filter settings

Static digital input, static digital output, timing input, timing output

Many AI, AO, counter, DI, DO timing signals

125 ns, 6.425 µs, 2.56 ms, disable; high and low transitions; selectable per input

Recommended Operation Conditions

6

Level Min

2.2 V

0 V

Max

5.25 V

0.8 V

Output high current (I

OH

)

P0.<0..31>

PFI <0..15>/P1/P2

Output low current (I

OL

)

P0.<0..31>

PFI <0..15>/P1/P2

Electrical Characteristics

—

—

—

—

-24 mA

-16 mA

24 mA

16 mA

Level

Positive-going threshold (VT+)

Negative-going threshold (VT-)

Delta VT hysteresis (VT+ - VT-)

Min

—

0.8 V

0.2 V

—

—

Max

2.2 V

—

—

-10 µA

250 µA

Digital I/O Characteristics

6

www.ni.com

6

x

NI 625x Specifications

(part number 371291G-01) for more details.

General-Purpose Counter/Timers

Number of counter/timers

Resolution

Counter measurements

Position measurements

Output applications

Internal base clocks

External base clock frequency

Base clock accuracy

Inputs

Routing options for inputs

FIFO

Data transfers


USB devices

Frequency Generator

Number of channels

Base clocks

Divisors

Base clock accuracy

Output can be available on any PFI or RTSI terminal.

Phase-Locked Loop (PLL)

Number of PLLs

Reference signal

Output of PLL

External Digital Triggers

Source

Polarity

Analog input function

2

32 bits

Edge counting, pulse, semi-period, period, two-edge separation

X1, X2, X4 quadrature encoding with Channel Z reloading; two-pulse encoding

Pulse, pulse train with dynamic updates, frequency division, equivalent time sampling

80 MHz, 20 MHz, 0.1 MHz

0 MHz to 20 MHz

50 ppm

Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down

Any PFI, RTSI, PXI_TRIG, PXI_STAR, analog trigger, many internal signals

2 samples

Dedicated scatter-gather DMA controller for each counter/timer; interrupts, programmed I/O


1

10 MHz, 100 kHz

1 to 16

50 ppm

1

PXI_STAR, PXI_CLK10, RTSI <0..7>

80 MHz Timebase; other signals derived from 80 MHz Timebase including 20 MHz and 100 kHz Timebases

Any PFI, RTSI, PXI_TRIG, PXI_STAR

Software-selectable for most signals

Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Convert Clock,

Sample Clock Timebase

www.ni.com

Analog output function

Counter/timer functions

Digital waveform generation (DO) function

Digital waveform acquisition (DI) function

Start Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase

Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down

Sample Clock

Sample Clock

Device-To-Device Trigger Bus

PCI/PCIe devices

RTSI <0..7>

7

PXI_TRIG <0..7>, PXI_STAR PXI/PXIe devices

USB devices

Output selections

None

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

7

In other sections of this document,

RTSI

refers to RTSI <0..7> for PCI/PCIe devices or PXI_TRIG <0..7> for PXI/PXIe devices.

Bus Interface

PCI/PXI devices

PCIe devices

Form factor

Slot compatibility

PXIe devices

Form factor

Slot compatibility

USB devices

DMA channels (PCI/PCIe/PXI/PXIe devices)

USB Signal Stream (USB devices)

3.3 V or 5 V signal environment x1 PCI Express, specification v1.0a compliant x1, x4, x8, and x16 PCI Express slots

8 x1 PXI Express peripheral module, specification rev 1.0 compliant x1 and x4 PXI Express or PXI Express hybrid slots

USB 2.0 Hi-Speed or full-speed

9,10

6, analog input, analog output, digital input, digital output, counter/timer 0, counter/timer 1

4, can be used for analog input, analog output, digital input, digital output, counter/timer 0, counter/timer 1

All PXI-625x 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

PXI-6250

PXI-6251

PXI-6254

PXI-6255

PXI-6259

M Series Device

Earlier versions of PXI-6251/ 6254/6259

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

M Series Part Number

SCXI Control in PXI/SCXI Combo

Chassis

191325D-04/191325E-04L

191325D-03/191325E-03L

191325D-13/191325E-13L

191325D-02/191325E-03L

No

No

Yes

No

193618A-01

191325D-01/191325E-01L

191325D-11/191325E-11L

191325C-0 191325B-0

x

No

No

Yes

Yes

PXI Express Hybrid Slot Compatible

Yes

Yes

No

Yes

Yes

Yes

No

No

8

Some motherboards reserve the x16 slot for graphics use. For PCI Express guidelines, refer to ni.com/pciexpress .

9

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.

10

Operating on a full-speed bus may result in lower high-speed full-speed performance.

Power Requirements

Current draw from bus during no-load condition

11

PCI/PXI devices

+5 V

+3.3 V

+12 V

PCIe devices

+3.3 V

0.03 A

0.725 A

0.35 A

0.925 A

www.ni.com

+12 V

PXIe devices

+3.3 V

+12 V

Current draw from bus during AI and AO overvoltage condition

11

PCI/PXI devices

+5 V

+3.3 V

+12 V

PCIe devices

+3.3 V

+12 V

PXIe devices

+3.3 V

+12 V

0.35 A

0.45 A

0.5 A

1.4 A

0.38 A

0.48 A

0.71 A

0.03 A

1.2 A

0.38 A for the device and has appropriate safety certification marks for country of use.

USB power supply requirements

11

Does not include P0/PFI/P1/P2 and +5 V terminals.

Power Limits

11 to 30 VDC, 20 W, locking or non-locking power jack with 0.080" diameter center pin, 5/16-32 thread for locking collars

Caution Exceeding the power limits may cause unpredictable behavior by the device and/or PC/chassis.

PCI devices

+5 V terminal (connector 0)


PCIe devices

1 A max

12

1 A max

12

Without disk drive power connector installed

+5 V terminals combined

0.35 A max

12

0.39 A max P0/PFI/P1/P2 and +5 V terminals combined

With disk drive power connector installed



1 A max

12

1 A max

12

0.39 A max P0/PFI/P1/P2 combined

PXI/PXIe devices



1 A max

12

1 A max

12

P0/PFI/P1/P2 and +5 V terminals combined

USB devices

+5 V terminal

P0/PFI/P1/P2 and +5 V terminals combined

Power supply fuse

12

Has a self-resetting fuse that opens when current exceeds this specification.

2 A max

1 A max

12

2 A max

2 A, 250 V

Physical Requirements

Printed circuit board dimensions

NI PCI-6250/6251/6254/6255/6259

NI PCIe-6251/6259

9.7 × 15.5 cm (3.8 × 6.1 in.)

9.9 × 16.8 cm (3.9 × 6.6 in.) (half-length)

www.ni.com

NI PXI/PXIe-6250/6251/6254/6255/6259

Enclosure dimensions (includes connectors)

NI USB-6251/6255/6259 Screw Terminal

NI USB-6251/6259 BNC

NI USB-6251/6255/6259 Mass Termination

NI USB-6251/6255/6259 OEM

Weight

NI PCI-6250

NI PCI-6251

NI PCI-6254

NI PCI-6255

NI PCI-6259

NI PCIe-6251

NI PCIe-6259

NI PXI-6250

NI PXI-6251/6254

NI PXI-6255

NI PXI-6259

NI PXIe-6251

NI PXIe-6259

NI USB-6251 Screw Terminal

NI USB-6255/6259 Screw Terminal

NI USB-6251/6255/6259 Mass Termination

NI USB-6251 OEM

NI USB-6255/6259 OEM

I/O connector

NI PCI/PCIe/PXI/PXIe-6250/6251

NI PCI/PCIe/PXI/PXIe-6254/6255/6259

NI USB-6251 Screw Terminal

NI USB-6255/6259 Screw Terminal

NI USB-6251 BNC

NI USB-6259 BNC

NI USB-6251 Mass Termination

NI USB-6255/6259 Mass Termination

Disk drive power connector (PCIe devices)

USB-6251/6255/6259 Screw Terminal/USB-6251/6259 BNC screw terminal wiring

Maximum Working Voltage

13

NI 6250/6251/6254/6255/6259 channel-to-earth

Caution Do

not

use for measurements within Categories II, III, or IV.

13

Maximum working voltage refers to the signal voltage plus the common-mode voltage.

Environmental

Operating temperature

PCI/PXI/PXIe devices

PCIe devices

USB devices

Standard 3U PXI

26.67 × 17.09 × 4.45 cm (10.5 × 6.73 × 1.75 in.)

28.6 × 17 × 6.9 cm (11.25 × 6.7 × 2.7 in.)

18.8 × 17.09 × 4.45 cm (7.4 × 6.73 × 1.75 in.)

Refer to the NI USB-622x/625x OEM User Guide

142 g (5 oz)

149 g (5.2 oz)

152 g (5.3 oz)

164 g (5.8 oz)

162 g (5.6 oz)

161 g (5.7 oz)

175 g (6.1 oz)

212 g (7.5 oz)

222 g (7.8 oz)

236 g (8.3 oz)

233 g (8.2 oz)

208 g (7.3 oz)

221 g (7.8 oz)

1.2 kg (2 lb 10 oz)

1.24 kg (2 lb 11 oz)

816 g (1 lb 12.8 oz)

140 g (4.9 oz)

172 g (6.1 oz)

1 68-pin VHDCI

2 68-pin VHDCI

64 screw terminals

128 screw terminals

21 BNCs and 30 screw terminals

32 BNCs and 60 screw terminals

1 68-pin SCSI

2 68-pin SCSI

Standard ATX peripheral connector (not serial ATA)

16-28 AWG

11 V, Measurement Category I

0 to 55 °C

0 to 50 °C

0 to 45 °C

www.ni.com

Storage temperature

Humidity

Maximum altitude

Pollution Degree (indoor use only)

Shock and Vibration (PXI/PXIe Devices Only)

-20 to 70 °C

10 to 90% RH, noncondensing

2,000 m

2

Operational shock

Random vibration

Operating

Nonoperating

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.)

5 to 500 Hz, 0.3 g rms

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 visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column.

Electromagnetic Compatibility

This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement, control, and laboratory use:

EN 61326 EMC requirements; Minimum Immunity

EN 55011 Emissions; Group 1, Class A

CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A

Note For EMC compliance, operate this device with shielded cables.

CE Compliance

This product meets the essential requirements of applicable European Directives, as amended for CE marking, as follows:

73/23/EEC; Low-Voltage Directive (safety)

89/336/EEC; Electromagnetic Compatibility Directive (EMC)

Note Refer to the Declaration of Conformity (DoC) for this product for any additional regulatory compliance information. To obtain 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

National Instruments 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)

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.

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www.ni.com

Pinouts/Front Panel Connections

NI PCI/PXI-6250 Pinout

www.ni.com

NI PCI/PCIe/PXI/PXIe-6251 Pinout

www.ni.com


www.ni.com


www.ni.com

NI PCI/PCIe/PXI/PXIe-6259 Pinout

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Torvalds in the U.S. and other countries. Other product and company names listed are trademarks or trade names of their respective companies.

| | | | © 2012 National Instruments Corporation. All rights reserved.

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