National Instruments NI PXI-4224 - Manuals

Contents NI PXI-4224 User Manual vi ni.com Chapter 5Using the NI PXI-4224 Developing Your Application ....................................................................................... 5-1 Typical Program Flow Chart........................................................................... 5-1O...

Contents © National Instruments Corporation vii NI PXI-4224 User Manual Figures Figure 2-1. NI PXI-4224 Front Label ...................................................................... 2-3 Figure 2-2. Unshielded Floating Signal Source Connection Using a D-SUB Connector ...............................

Contents NI PXI-4224 User Manual viii ni.com Tables Table 2-1. NI PXI-4224 25-Pin D-SUB Terminal Pin Assignments ..................... 2-2 Table 4-1. Signal Conditioning Functional Blocks ................................................ 4-3 Table 4-2. PXI Trigger Bus Timing Signals ....................

Chapter 1 About the NI PXI-4224 NI PXI-4224 User Manual 1-2 ni.com What You Need to Get Started To set up and use the NI PXI-4224, you need the following: ❑ Hardware – NI PXI-4224 – One of the following: • TB-2725 terminal block • 25-pin D-SUB female connector – PXI or PXI/SCXI combination chassis ❑...

Chapter 1 About the NI PXI-4224 © National Instruments Corporation 1-3 NI PXI-4224 User Manual National Instruments Documentation The NI PXI-4224 User Manual is one piece of the documentation set for your DAQ system. You could have any of several types of manuals depending on the hardware and softwa...

Chapter 1 About the NI PXI-4224 NI PXI-4224 User Manual 1-4 ni.com Installing the NI PXI-4224 Note Refer to the Read Me First: Radio-Frequency Interference document before removing equipment covers or connecting or disconnecting any signal wires. Refer to the DAQ Getting Started Guide to unpack, ins...

© National Instruments Corporation 2-1 NI PXI-4224 User Manual 2 Connecting Signals This chapter provides details about the front signal connector of the NI PXI-4224 and how to connect signals to the NI PXI-4224. Connecting Signals to the NI PXI-4224 After you have verified that the NI PXI-4224 is i...

Chapter 2 Connecting Signals © National Instruments Corporation 2-3 NI PXI-4224 User Manual Figure 2-1. NI PXI-4224 Front Label Analog Input Connections The following sections provide a definition of the signal source characteristics, descriptions of various ways to connect signals to the NI PXI-422...

Chapter 2 Connecting Signals © National Instruments Corporation 2-11 NI PXI-4224 User Manual Figure 2-9. Shielded Grounded Signal Source Connection Using a Terminal Block Floating Signal Source Connection Figures 2-2, 2-4, 2-6, and 2-8 illustrate floating signal source connections. In this configura...

Chapter 2 Connecting Signals NI PXI-4224 User Manual 2-12 ni.com Ground-Referenced Signal Connection Figures 2-3, 2-5, 2-7, and 2-9 illustrate the ground-referenced signal connection. In this configuration, the voltage source being measured is referenced to its own ground reference that is connected...

© National Instruments Corporation 3-1 NI PXI-4224 User Manual 3 Configuring and Testing This chapter provides details about configuring and testing the NI PXI-4224 in MAX, including how to use device test panels and create and configure NI-DAQmx Tasks and NI-DAQmx Global Channels. Verifying and Sel...

Chapter 3 Configuring and Testing NI PXI-4224 User Manual 3-2 ni.com Configuring the NI PXI-4224 in MAX This section describes how to create NI-DAQmx Tasks and NI-DAQmx Global Channels in MAX that allow you to take measurements with the NI PXI-4224. Creating a Voltage Task or Global Channel Using NI...

Chapter 3 Configuring and Testing © National Instruments Corporation 3-3 NI PXI-4224 User Manual Verifying and Self-Testing an NI-DAQmx Task or Global Channel After you have created an analog input voltage NI-DAQmx Task or NI-DAQmx Global Channel, verify the NI-DAQmx Task or NI-DAQmx Global Channel ...

© National Instruments Corporation 4-1 NI PXI-4224 User Manual 4 Theory of Operation This chapter describes the theory of operation, measurement considerations, and timing information. Theory of Operation Figure 4-1 illustrates the key functional components of the NI PXI-4224, including the DAQ and ...

Chapter 4 Theory of Operation © National Instruments Corporation 4-3 NI PXI-4224 User Manual Signal Conditioning Functional Overview The NI PXI-4224 is part of the PXI-4200 series of DAQ devices with integrated signal conditioning designed to provide application-specific signal conditioning, DAQ, an...

Chapter 4 Theory of Operation NI PXI-4224 User Manual 4-4 ni.com Figure 4-2. Effect of Input Impedance on Signal Measurements Although R S does not influence DC measurements, take care when measuring AC signals since C IN attenuates higher frequencies if R S is too large. For example: Common-Mode Re...

Chapter 4 Theory of Operation © National Instruments Corporation 4-5 NI PXI-4224 User Manual Effective CMR When the frequency of a common-mode signal is known and outside of the measurement frequency band of interest, you can use an analog or digital filter, or both, to further reduce the residual e...

Chapter 4 Theory of Operation NI PXI-4224 User Manual 4-6 ni.com Figure 4-3. AI CONV CLK Signal Routing Figure 4-3 shows that AI CONV CLK can be generated from a number of sources, such as the external signals PFI 0, PXI_Trig<0..5>, and PXI_Star, and the Ctr 0 Internal Output. Programmable Fun...

Chapter 4 Theory of Operation © National Instruments Corporation 4-7 NI PXI-4224 User Manual Device and PXI Clocks Many functions performed by the NI PXI-4224 require a frequency timebase to generate the necessary timing signals for controlling A/D conversions, digital-to-analog converter (DAC) upda...

© National Instruments Corporation 5-1 NI PXI-4224 User Manual 5 Using the NI PXI-4224 This chapter describes how to program the NI PXI-4224, using DAQ Assistant or LabVIEW, and how to calibrate the device. Developing Your Application This section describes the software and programming steps necessa...

Chapter 5 Using the NI PXI-4224 © National Instruments Corporation 5-3 NI PXI-4224 User Manual Overview of Typical Flow Chart The following sections briefly discuss some considerations for some of the steps in Figure 5-1. These sections are meant to provide an overview of some of the options and fea...

Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-4 ni.com When programmatically adjusting timing settings, you can set the task to acquire continuously, acquire a buffer of samples, or acquire one point at a time. For continuous and buffered acquisitions, you can set the acquisition rate an...

Chapter 5 Using the NI PXI-4224 © National Instruments Corporation 5-5 NI PXI-4224 User Manual Acquiring, Analyzing, and Presenting After configuring the task and channels, you can start your acquisition, read measurements, analyze the data returned, and display it according to the needs of your app...

Chapter 5 Using the NI PXI-4224 © National Instruments Corporation 5-7 NI PXI-4224 User Manual Using a DAQmx Channel Property Node in LabVIEW You can use property nodes in LabVIEW to manually configure your channels. To create a LabVIEW property node, complete the following steps: 1. Launch LabVIEW....

Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-8 ni.com 8. Once you have added the property to the property node, right-click the terminal to change the attributes of the property, or to add a control, constant, or indicator. 9. To add another property to the property node, right-click an...

Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-10 ni.com Synchronizing the NI PXI-4224 Using LabVIEW This section describes in more detail the steps shown in Figure 5-2, such as how to create a task in LabVIEW and configure the channels of the NI PXI-4224. For further instructions, select...

Chapter 5 Using the NI PXI-4224 © National Instruments Corporation 5-11 NI PXI-4224 User Manual Other Application Documentation and Material The following locations provide more information that you may find useful when setting up or connecting signal sources or programming your application. • LabVI...

Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-12 ni.com Calibrating the NI PXI-4224 Calibration refers to the process of minimizing measurement errors. On the NI PXI-4224, errors from the digitizer components of the DAQ device circuitry are corrected in the analog circuitry by onboard ca...

Chapter 5 Using the NI PXI-4224 © National Instruments Corporation 5-13 NI PXI-4224 User Manual 4. Right-click the NI PXI-4224 and select Self-Calibrate . 5. A dialog box opens indicating that the NI PXI-4224 is self-calibrating. 6. When the dialog box closes, the NI PXI-4224 is successfully self-ca...

© National Instruments Corporation A-1 NI PXI-4224 User Manual A Specifications This appendix lists the specifications for the NI PXI-4224 device. These specifications are typical at 25 °C unless otherwise noted. Overvoltage Protection Powered on or off ................................... 42.4 V pea...

Appendix A Specifications for NI PXI-4224 User Manual A-2 ni.com Input coupling .........................................DC Bandwidth, –3 dB ...................................15 kHz Slew rate .................................................2 V/ μ s typical Input impedance Powered on .................

Appendix A Specifications for © National Instruments Corporation A-3 NI PXI-4224 User Manual Calibration Recommended warm-up time ................ 30 minutes External calibration interval ................... 1 year Pre-Calibration Errors 1 Pre-calibration offset errorrelative to input (RTI) ...........

Appendix A Specifications for NI PXI-4224 User Manual A-4 ni.com Response .................................................Rising or falling edge, software programmable Pulse width .............................................10 ns min Impedance ...............................................10 k Ω ...

Appendix A Specifications for © National Instruments Corporation A-5 NI PXI-4224 User Manual Weight .................................................... 279 g (9.8 oz) Analog input signal connector ............... 25-Pin D-SUB Maximum Working Voltage (Signal + common-mode) each input should remain w...

Appendix A Specifications for NI PXI-4224 User Manual A-6 ni.com Safety This product meets 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 cer...

Appendix A Specifications for © National Instruments Corporation A-7 NI PXI-4224 User Manual 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 ben...

© National Instruments Corporation B-1 NI PXI-4224 User Manual B Timing Signal Information This appendix contains additional information about the timing signals discussed in Chapter 4, Theory of Operation . Connecting Timing Signals Caution Exceeding the maximum input voltage ratings listed in Appe...

Appendix B Timing Signal Information NI PXI-4224 User Manual B-2 ni.com DAQ Timing Connections The timing signals are AI START TRIG, AI REF TRIG, AI SAMP CLK, AI CONV CLK, AI PAUSE TRIG, AI SAMPLE CLK TIMEBASE, and AI HOLD COMPLETE. Posttriggered DAQ allows you to view data that is acquired after a ...

Appendix B Timing Signal Information © National Instruments Corporation B-3 NI PXI-4224 User Manual AI START TRIG Signal The AI START TRIG signal can be input or output through PFI 0, PXI_Trig<0..5>, or PXI_Star. As an input, AI START TRIG is configured in the edge-detection mode. You can sele...

Appendix B Timing Signal Information NI PXI-4224 User Manual B-4 ni.com The device also uses AI START TRIG to initiate pretriggered operations. In pretriggered applications, AI START TRIG is generated by a software trigger unless a PFI pin is selected as the source of AI START TRIG. Refer to the AI ...

Appendix B Timing Signal Information © National Instruments Corporation B-5 NI PXI-4224 User Manual Figure B-6. AI REF TRIG Output Signal Timing AI SAMP CLK Signal The AI SAMP CLK signal can be externally input from PFI 0, PXI_Trig<0..5>, or PXI_Star. It can be output on any PXI trigger bus li...

Appendix B Timing Signal Information © National Instruments Corporation B-7 NI PXI-4224 User Manual AI SAMP CLK generates a conversion. Separate the AI SAMP CLK pulses by at least one scan period. A counter on the device internally generates AI SAMP CLK unless you select some external source. The AI...

Appendix B Timing Signal Information NI PXI-4224 User Manual B-8 ni.com Figure B-10. AI CONV CLK Output Signal Timing The ADC switches to hold mode within 60 ns of the selected edge. This hold-mode delay time is a function of temperature and does not vary from one conversion to the next. Separate th...

Appendix B Timing Signal Information © National Instruments Corporation B-9 NI PXI-4224 User Manual AI SAMPLE CLK TIMEBASE Signal PFI 0, PXI_Trig<0..5>, or PXI_Star can externally input the AI SAMPLE CLK TIMEBASE signal, which is not available as an output on the I/O connector. The onboard sca...

Appendix B Timing Signal Information NI PXI-4224 User Manual B-10 ni.com AI HOLD COMPLETE Signal AI HOLD COMPLETE is an output-only signal that generates a pulse with the leading edge occurring approximately 50 to 100 ns after an A/D conversion begins. The polarity of this output is software configu...

Appendix C Removing the NI PXI-4224 NI PXI-4224 User Manual C-2 ni.com Figure C-1. Injector/Ejector Handle Position Before Device Removal Removing the NI PXI-4224 from MAX To remove an NI PXI-4224 device from MAX, complete the following steps after launching MAX: 1. Expand Devices and Interfaces to ...

© National Instruments Corporation D-1 NI PXI-4224 User Manual D Common Questions This appendix lists common questions related to the use of the NI PXI-4224. Which version of NI-DAQ works with the NI PXI-4224 and how do I get the most current version of NI-DAQ? You must have NI-DAQ 7.3.1 or later an...

Appendix D Common Questions NI PXI-4224 User Manual D-2 ni.com How do I perform an external calibration of the NI PXI-4224? As of the NI PXI-4224 release, an external calibration document is not available. To check the availability of an NI PXI-4224 external calibration document is go to ni.com/cali...

© National Instruments Corporation G-1 NI PXI-4224 User Manual Glossary Symbol Prefix Value p pico 10 – 12 n nano 10 – 9 μ micro 10 – 6 m milli 10 – 3 k kilo 10 3 M mega 10 6 G giga 10 9 T tera 10 12 Symbols / Per. ° Degree. % Percent. + Positive of, or plus. – Negative of, or minus. Ω Ohm. A A Ampe...

© National Instruments Corporation I-1 NI PXI-4224 User Manual Index A AI CONV CLK signal input signal timing (figure), B-7output signal timing (figure), B-8overview, B-7signal routing (figure), 4-6 AI HOLD COMPLETE signal description (table), 4-9overview, B-10signal timing (figure), B-10 AI PAUSE T...