Last Revised: 2008-09-24 10:47:16.0
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OS Information
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Driver Information
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Software Compatibility
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| 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 |
|---|---|---|---|---|---|---|---|---|---|
| NI 6250 | PCI, PXI | 16 | 16 | 0 | - | - | - | 24 | 8, up to 10 MHz |
| NI 6251 | PCI, PCI Express, PXI, PXI Express, USB | 16 | 16 | 2 | 16 | 2.8 | ±10, ±5, ±ext ref | 24 | 8, up to 10 MHz |
| NI 6254 | PCI, PXI | 32 | 16 | 0 | - | - | - | 48 | 32, up to 10 MHz |
| NI 6255 | PCI, PXI, USB | 80 | 16 | 2 | 16 | 2.8 | ±10, ±5, ±ext ref | 24 | 8, up to 10 MHz |
| NI 6259 | PCI, PCI Express, PXI, PXI Express, USB | 32 | 16 | 4 | 16 | 2.8 | ±10, ±5, ±ext ref | 48 | 32, up to 10 MHz |
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 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.
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.
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.
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:
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.
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.
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.
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.
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.
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:
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.
For a complete list of accessories, visit the product page on ni.com.
| Products | Part Number | Recommended Accessories | Part Number |
| NI PXI-6259 | |||
| NI PXI-6259 Each NI PXI-6259 requires: 2 Cables, 2 Connector Blocks | 779632-01 | 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-6259 Each NI PXI-6259 requires: 2 Cables, 2 Connector Blocks | 779119-01 | 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-6251 | |||
| NI PXI-6251 Each NI PXI-6251 requires: 1 Cable, 1 Connector Block | 779631-01 | 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-6251 Each NI PXI-6251 requires: 1 Cable, 1 Connector Block | 779117-01 | 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 PCIe-6251 | |||
| NI PCIe-6251 Each NI PCIe-6251 requires: 1 Cable, 1 Connector Block | 779512-01 | 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-6254 | |||
| NI PCI-6254 Each NI PCI-6254 requires: 2 Cables, 2 Connector Blocks | 779071-01 | 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-6251 | |||
| NI PCI-6251 Each NI PCI-6251 requires: 1 Cable, 1 Connector Block | 779070-01 | 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-6254 | |||
| NI PXI-6254 Each NI PXI-6254 requires: 2 Cables, 2 Connector Blocks | 779118-01 | 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-6250 | |||
| NI PCI-6250 Each NI PCI-6250 requires: 1 Cable, 1 Connector Block | 779069-01 | 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-6255 | |||
| NI PCI-6255 Each NI PCI-6255 requires: 2 Connector Blocks | 779546-01 | Connector 0: | |
| Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination | 776844-01 | ||
| Connector 1: | |||
| Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination | 776844-01 | ||
| NI PXI-6250 | |||
| NI PXI-6250 Each NI PXI-6250 requires: 1 Cable, 1 Connector Block | 779116-01 | 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-6255 | |||
| NI PXI-6255 Each NI PXI-6255 requires: 2 Connector Blocks | 779547-01 | Connector 0: | |
| Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination | 776844-01 | ||
| Connector 1: | |||
| Connector Block: Screw Terminals - SCB-68 **Also available: BNC Termination | 776844-01 | ||
| NI PXIe-6259 | |||
| NI PXIe-6259 Each NI PXIe-6259 requires: 2 Cables, 2 Connector Blocks | 779778-01 | 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 PXIe-6251 | |||
| NI PXIe-6251 Each NI PXIe-6251 requires: 1 Cable, 1 Connector Block | 779777-01 | 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 PCIe-6259 | |||
| NI PCIe-6259 Each NI PCIe-6259 requires: 2 Cables, 2 Connector Blocks | 779513-01 | 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-6259 | |||
| NI PCI-6259 Each NI PCI-6259 requires: 2 Cables, 2 Connector Blocks | 779072-01 | 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 LabVIEW Professional Development System for Mac OS X
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NI Measurement Studio Professional Edition
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NI LabWindows™/CVI for Windows
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NI LabVIEW SignalExpress for Windows
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NI system services are designed to save you time and money by having NI technicians assemble, configure, test, and document your NI PXI, CompactRIO, or Compact FieldPoint system before it is shipped from the NI factory. With system services, you can take advantage of an out-of-the-box experience that gets you started with your new system quickly and provides valuable post-deployment services such as an extended warranty. For more information, visit ni.com/systemservices.
NI measurement hardware is calibrated to ensure measurement accuracy and verify that the device meets its published specifications. To ensure the ongoing accuracy of your measurement hardware, NI offers basic or detailed recalibration service that provides ongoing ISO 9001 audit compliance and confidence in your measurements. 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.
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.
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.
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.
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.
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.
Specifications listed below are typical at 25 °C unless otherwise noted. Refer to the M Series User Manual for more information about NI 625x devices.
| Analog Input | ||||||||||||||
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Number of channels |
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NI 6250/6251 |
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8 differential or 16 single ended |
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NI 6254/6259 |
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16 differential or 32 single ended |
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NI 6255 |
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40 differential or 80 single ended |
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ADC resolution |
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16 bits |
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DNL |
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No missing codes guaranteed |
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INL |
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Refer to the AI Absolute Accuracy Table |
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Sampling rate |
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Maximum |
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NI 6250/6251/6254/6259 |
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1.25 MS/s single channel, |
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NI 6255 |
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1.25 MS/s single channel |
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Minimum |
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No minimum |
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Timing accuracy |
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50 ppm of sample rate |
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Timing resolution |
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50 ns |
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Input coupling |
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DC |
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Input range |
±10 V, ±5 V, ±2 V, ±1 V, ±0.5 V, ±0.2 V, ±0.1 V |
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Maximum working voltage for analog inputs (signal + common mode) |
±11 V of AI GND |
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CMRR (DC to 60 Hz) |
100 dB |
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Input impedance |
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Device on |
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AI+ to AI GND |
>10 GΩ in parallel with 100 pF |
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AI- to AI GND |
>10 GΩ in parallel with 100 pF |
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Device off |
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AI+ to AI GND |
820 Ω |
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AI- to AI GND |
820 Ω |
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Input bias current |
±100 pA |
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Crosstalk (at 100 kHz) |
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Adjacent channels |
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-75 dB |
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Non-adjacent channels |
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-90 dB1 |
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Small signal bandwidth (-3 dB) |
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1.7 MHz |
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Input FIFO size |
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4,095 samples |
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Scan list memory |
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4,095 entries |
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Data transfers |
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PCI/PCIe/PXI/PXIe devices |
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DMA (scatter-gather), interrupts, programmed I/O |
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USB devices |
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USB Signal Stream, programmed I/O |
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Overvoltage protection (AI <0..79>, AI SENSE, AI SENSE 2) |
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Device on |
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±25 V for up to four AI pins |
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Device off |
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±15 V for up to four AI pins |
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Input current during overvoltage condition |
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±20 mA max/AI pin |
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1 For USB-6255 devices, channel AI <0..15> crosstalk to channel AI <64..79> is -67 dB; applies to channels with 64-channel separation, for example, AI (x) and AI (x + 64). |
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Settling Time for Multichannel Measurements |
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NI 6250/6251/6254/6259
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NI 6255
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| Typical Performance Graphs | |
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Analog Triggers |
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| Number of triggers |
1 |
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| Source |
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NI 6250/6251 |
AI <0..15>, APFI 0 |
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NI 6254/6259 |
AI <0..31>, APFI <0..1> |
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NI 6255 |
AI <0..79>, APFI 0 |
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| Functions |
Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Convert Clock, Sample Clock Timebase |
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| Source level |
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AI <0..79> |
±full scale |
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APFI <0..1> |
±10 V |
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Resolution |
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10 bits, 1 in 1,024 |
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Modes |
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Analog edge triggering, analog edge triggering with hysteresis, and analog window triggering |
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Bandwidth (-3 dB) |
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AI <0..79> |
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3.4 MHz |
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APFI <0..1> |
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3.9 MHz |
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Accuracy |
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±1% |
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APFI <0..1> characteristics |
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Input impedance |
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10 kΩ |
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Coupling |
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DC |
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Protection |
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Power on |
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±30 V |
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Power off |
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±15 V |
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Analog Output |
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Number of channels |
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NI 6250/6254 |
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0 |
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NI 6251/6255 |
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2 |
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NI 6259 |
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4 |
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DAC resolution |
16 bits | |
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DNL |
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±1 LSB |
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Monotonicity |
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16 bit guaranteed |
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Accuracy |
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Refer to the AO Absolute Accuracy Table |
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Maximum update rate |
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1 channel |
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2.86 MS/s |
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2 channels |
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2.00 MS/s |
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3 channels |
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1.54 MS/s |
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4 channels |
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1.25 MS/s |
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Timing accuracy |
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50 ppm of sample rate |
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Timing resolution |
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50 ns |
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Output range |
±10 V, ±5 V, ±external reference on APFI <0..1> | |
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Output coupling |
DC |
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Output impedance |
0.2 Ω |
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Output current drive |
±5 mA | |
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Overdrive protection |
±25 V |
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Overdrive current |
20 mA |
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Power-on state |
±5 mV2 |
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Power-on glitch |
1.5 V peak for 1.5 s |
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Output FIFO size |
8,191 samples shared among channels used |
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Data transfers |
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PCI/PCIe/PXI/PXIe devices |
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DMA (scatter-gather), interrupts, programmed I/O |
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USB devices |
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USB Signal Stream, programmed I/O |
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AO waveform modes:
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Settling time, full scale step 15 ppm (1 LSB) |
2 µs |
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Slew rate |
20 V/µs |
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Glitch energy at midscale transition, ±10 V range |
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Magnitude |
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10 mV |
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Duration |
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1 µs |
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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. |
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External Reference |
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APFI <0..1> characteristics |
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Input impedance |
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10 kΩ |
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Coupling |
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DC |
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Protection |
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Power on |
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±30 V |
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Power off |
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±15 V |
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Range |
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±11 V |
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Slew rate |
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20 V/µs |
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Calibration (AI and AO) |
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Recommended warm-up time |
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15 minutes |
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Calibration interval |
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2 years |
AI Absolute Accuracy Table |
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| 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) |
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Positive |
Negative |
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| 10 | -10 | 60 | 13 | 1 | 20 | 21 | 60 | 280 | 1,920 | 112.0 |
| 5 | -5 | 70 | 13 | 1 | 20 | 21 | 60 | 140 | 1,010 | 56.0 |
| 2 | -2 | 70 | 13 | 1 | 20 | 24 | 60 | 57 | 410 | 22.8 |
| 1 | -1 | 80 | 13 | 1 | 20 | 27 | 60 | 32 | 220 | 12.8 |
| 0.5 | - 0.5 | 90 | 13 | 1 | 40 | 34 | 60 | 21 | 130 | 8.4 |
| 0.2 | - 0.2 | 130 | 13 | 1 | 80 | 55 | 60 | 16 | 74 | 6.4 |
| 0.1 | - 0.1 | 150 | 13 | 1 | 150 | 90 | 60 | 15 | 52 | 6.0 |
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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 = 60 ppm + 13 ppm · 1 + 1 ppm · 10 GainError = 83 ppm OffsetError = 20 ppm + 21 ppm · 1 + 60 ppm OffsetError = 101 ppm
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 | 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) |
|
|---|---|---|---|---|---|---|---|---|
|
Positive |
Negative |
|||||||
| 10 | -10 | 75 | 17 | 1 | 40 | 2 | 64 | 2,080 |
| 5 | -5 | 85 | 8 | 1 | 40 | 2 | 64 | 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. 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 |
|
24 total, 8 (P0.<0..7>), 16 (PFI <0..7>/P1, PFI <8..15>/P2) |
|
NI 6254/6259 |
48 total, 32 (P0.<0..31>), 16 (PFI <0..7>/P1, PFI <8..15>/P2) |
|
|
Ground reference |
D GND |
|
|
Direction control |
|
Each terminal individually programmable as input or output |
|
Pull-down resistor |
|
50 kΩ typ, 20 kΩ min |
|
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 6250/6251/6255 |
|
Port 0 (P0.<0..7>) |
|
NI 6254/6259 |
|
Port 0 (P0.<0..31>) |
|
Port/sample size |
|
|
|
NI 6250/6251/6255 |
|
Up to 8 bits |
|
NI 6254/6259 |
|
Up to 32 bits |
|
Waveform generation (DO) FIFO |
|
2,047 samples |
|
Waveform acquisition (DI) FIFO |
|
2,047 samples |
|
DI Sample Clock frequency |
|
|
|
PCI/PCIe/PXI/PXIe devices |
|
0 to 10 MHz4 |
|
USB devices |
|
0 to 1 MHz system dependent4 |
|
DO Sample Clock frequency |
|
|
|
PCI/PCIe/PXI/PXIe devices |
|
|
|
Regenerate from FIFO |
|
0 to 10 MHz |
|
Streaming from memory |
|
0 to 1 MHz system dependent4 |
|
USB devices |
|
|
|
Regenerate from FIFO |
|
0 to 10 MHz |
|
Streaming from memory |
|
0 to 1 MHz system dependent4 |
|
Data transfers |
|
|
|
PCI/PCIe/PXI/PXIe 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. |
||
|
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 |
|
Recommended Operation Conditions6 |
||
|
Level |
Min |
Max |
|---|---|---|
| Input high voltage (VIH) | 2.2 V | 5.25 V |
| Input low voltage (VIL) | 0 V | 0.8 V |
| Output high current (IOH) P0.<0..31> PFI <0..15>/P1/P2 |
— — |
-24 mA -16 mA |
| Output low current (IOL) P0.<0..31> PFI <0..15>/P1/P2 |
— — |
24 mA 16 mA |
|
Electrical Characteristics |
||
|
Level |
Min |
Max |
|---|---|---|
| Positive-going threshold (VT+) Negative-going threshold (VT-) |
— 0.8 V |
2.2 V — |
| Delta VT hysteresis (VT+ - VT-) | 0.2 V | — |
| IIL input low current (Vin = 0 V)
IIH input high current (Vin = 5 V) |
—
— |
-10 µA
250 µA |
|
Digital I/O Characteristics6 |
|
|
|
|
|
|
|
|
6 On earlier versions of the USB-6251 Screw Terminal (part numbers 194929A/B/C-0x) and the USB-6259 Screw Terminal (part numbers 194021B/C-0x), the digital I/O characteristics of P0.<16..31> match the characteristics of PFI <0..15>. Refer to the November 2006 version of the NI 625x Specifications (part number 371291G-01) for more details. |
|
|
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) |
||||||||||||||||||||||||||||||||||||||||
|
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/PCIe devices |
|
RTSI <0..7>7 |
||||||||||||||||||||||||||||||||||||||
|
PXI/PXIe 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 |
|||||||||||||||||||||||||||||||||||||||
|
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 |
|
3.3 V or 5 V signal environment |
||||||||||||||||||||||||||||||||||||||
|
PCIe devices |
|
|
||||||||||||||||||||||||||||||||||||||
|
Form factor |
|
x1 PCI Express, specification v1.0a compliant |
||||||||||||||||||||||||||||||||||||||
|
Slot compatibility |
|
x1, x4, x8, and x16 PCI Express slots8 |
||||||||||||||||||||||||||||||||||||||
|
PXIe devices |
|
|
||||||||||||||||||||||||||||||||||||||
|
Form factor |
|
x1 PXI Express peripheral module, specification rev 1.0 compliant |
||||||||||||||||||||||||||||||||||||||
|
Slot compatibility |
|
x1 and x4 PXI Express or PXI Express hybrid slots |
||||||||||||||||||||||||||||||||||||||
|
USB devices |
|
USB 2.0 Hi-Speed or full-speed9,10 |
||||||||||||||||||||||||||||||||||||||
|
DMA channels (PCI/PCIe/PXI/PXIe 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-625x devices support one of the following features:
|
||||||||||||||||||||||||||||||||||||||||
All NI PXIe-625x devices may be installed in PXI Express slots or PXI Express hybrid slots. |
||||||||||||||||||||||||||||||||||||||||
|
8 Some motherboards reserve the x16 slot for graphics use. For PCI Express guidelines, refer to ni.com/pciexpress. |
||||||||||||||||||||||||||||||||||||||||
|
Power Requirements |
||||||||||||||||||||||||||||||||||||||||
|
Current draw from bus during no-load condition11 |
|
|
||||||||||||||||||||||||||||||||||||||
|
PCI/PXI devices |
|
|
||||||||||||||||||||||||||||||||||||||
|
+5 V |
|
0.03 A |
||||||||||||||||||||||||||||||||||||||
|
+3.3 V |
|
0.725 A |
||||||||||||||||||||||||||||||||||||||
|
+12 V |
|
0.35 A |
||||||||||||||||||||||||||||||||||||||
|
PCIe devices |
|
|
||||||||||||||||||||||||||||||||||||||
|
+3.3 V |
|
0.925 A |
||||||||||||||||||||||||||||||||||||||
|
+12 V |
|
0.35 A |
||||||||||||||||||||||||||||||||||||||
|
PXIe devices |
|
|
||||||||||||||||||||||||||||||||||||||
|
+3.3 V |
|
0.45 A |
||||||||||||||||||||||||||||||||||||||
|
+12 V |
|
0.5 A |
||||||||||||||||||||||||||||||||||||||
|
Current draw from bus during AI and AO overvoltage condition11 |
|
|
||||||||||||||||||||||||||||||||||||||
|
PCI/PXI devices |
|
|
||||||||||||||||||||||||||||||||||||||
|
+5 V |
|
0.03 A |
||||||||||||||||||||||||||||||||||||||
|
+3.3 V |
|
1.2 A |
||||||||||||||||||||||||||||||||||||||
|
+12 V |
|
0.38 A |
||||||||||||||||||||||||||||||||||||||
|
PCIe devices |
|
|
||||||||||||||||||||||||||||||||||||||
|
+3.3 V |
|
1.4 A |
||||||||||||||||||||||||||||||||||||||
|
+12 V |
|
0.38 A |
||||||||||||||||||||||||||||||||||||||
|
PXIe devices |
||||||||||||||||||||||||||||||||||||||||
|
+3.3 V |
|
0.48 A |
||||||||||||||||||||||||||||||||||||||
|
+12 V |
0.71 A |
|||||||||||||||||||||||||||||||||||||||
Caution USB-625x devices must be powered with NI offered AC adapter or a National Electric Code (NEC) Class 2 DC source that meets the power requirements
for the device and has appropriate safety certification marks for country of use.
|
USB power supply requirements |
|
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 |
|
11 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 max12 |
|
+5 V terminal (connector 1) |
|
1 A max12 |
|
PCIe devices |
|
|
|
Without disk drive power connector installed |
|
|
|
+5 V terminals combined |
|
0.35 A max12 |
|
P0/PFI/P1/P2 and +5 V terminals combined |
|
0.39 A max |
|
With disk drive power connector installed |
|
|
|
+5 V terminal (connector 0) |
1 A max12 |
|
|
+5 V terminal (connector 1) |
1 A max12 |
|
|
P0/PFI/P1/P2 combined |
0.39 A max |
|
|
PXI/PXIe devices |
|
|
|
+5 V terminal (connector 0) |
1 A max12 |
|
|
+5 V terminal (connector 1) |
|
1 A max12 |
|
P0/PFI/P1/P2 and +5 V terminals combined |
|
2 A max |
|
USB devices |
|
|
|
+5 V terminal |
|
1 A max12 |
|
P0/PFI/P1/P2 and +5 V terminals combined |
|
2 A max |
|
Power supply fuse |
|
2 A, 250 V |
|
12 Has a self-resetting fuse that opens when current exceeds this specification. |
||
|
Physical Requirements |
||
|
Printed circuit board dimensions |
|
|
|
NI PCI-6250/6251/6254/6255/6259 |
|
9.7 × 15.5 cm (3.8 × 6.1 in.) |
|
NI PCIe-6251/6259 |
|
9.9 × 16.8 cm (3.9 × 6.6 in.) (half-length) |
|
NI PXI/PXIe-6250/6251/6254/6255/6259 |
|
Standard 3U PXI |
|
Enclosure dimensions (includes connectors) |
|
|
|
NI USB-6251/6255/6259 Screw Terminal |
|
26.67 × 17.09 × 4.45 cm (10.5 × 6.73 × 1.75 in.) |
|
NI USB-6251/6259 BNC |
|
28.6 × 17 × 6.9 cm (11.25 × 6.7 × 2.7 in.) |
|
NI USB-6251/6255/6259 Mass Termination |
||