National Instruments NI PXI-4224 manuel d'utilisation

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85

Aller à la page of

Un bon manuel d’utilisation

Les règles imposent au revendeur l'obligation de fournir à l'acheteur, avec des marchandises, le manuel d’utilisation National Instruments NI PXI-4224. Le manque du manuel d’utilisation ou les informations incorrectes fournies au consommateur sont à la base d'une plainte pour non-conformité du dispositif avec le contrat. Conformément à la loi, l’inclusion du manuel d’utilisation sous une forme autre que le papier est autorisée, ce qui est souvent utilisé récemment, en incluant la forme graphique ou électronique du manuel National Instruments NI PXI-4224 ou les vidéos d'instruction pour les utilisateurs. La condition est son caractère lisible et compréhensible.

Qu'est ce que le manuel d’utilisation?

Le mot vient du latin "Instructio", à savoir organiser. Ainsi, le manuel d’utilisation National Instruments NI PXI-4224 décrit les étapes de la procédure. Le but du manuel d’utilisation est d’instruire, de faciliter le démarrage, l'utilisation de l'équipement ou l'exécution des actions spécifiques. Le manuel d’utilisation est une collection d'informations sur l'objet/service, une indice.

Malheureusement, peu d'utilisateurs prennent le temps de lire le manuel d’utilisation, et un bon manuel permet non seulement d’apprendre à connaître un certain nombre de fonctionnalités supplémentaires du dispositif acheté, mais aussi éviter la majorité des défaillances.

Donc, ce qui devrait contenir le manuel parfait?

Tout d'abord, le manuel d’utilisation National Instruments NI PXI-4224 devrait contenir:
- informations sur les caractéristiques techniques du dispositif National Instruments NI PXI-4224
- nom du fabricant et année de fabrication National Instruments NI PXI-4224
- instructions d'utilisation, de réglage et d’entretien de l'équipement National Instruments NI PXI-4224
- signes de sécurité et attestations confirmant la conformité avec les normes pertinentes

Pourquoi nous ne lisons pas les manuels d’utilisation?

Habituellement, cela est dû au manque de temps et de certitude quant à la fonctionnalité spécifique de l'équipement acheté. Malheureusement, la connexion et le démarrage National Instruments NI PXI-4224 ne suffisent pas. Le manuel d’utilisation contient un certain nombre de lignes directrices concernant les fonctionnalités spécifiques, la sécurité, les méthodes d'entretien (même les moyens qui doivent être utilisés), les défauts possibles National Instruments NI PXI-4224 et les moyens de résoudre des problèmes communs lors de l'utilisation. Enfin, le manuel contient les coordonnées du service National Instruments en l'absence de l'efficacité des solutions proposées. Actuellement, les manuels d’utilisation sous la forme d'animations intéressantes et de vidéos pédagogiques qui sont meilleurs que la brochure, sont très populaires. Ce type de manuel permet à l'utilisateur de voir toute la vidéo d'instruction sans sauter les spécifications et les descriptions techniques compliquées National Instruments NI PXI-4224, comme c’est le cas pour la version papier.

Pourquoi lire le manuel d’utilisation?

Tout d'abord, il contient la réponse sur la structure, les possibilités du dispositif National Instruments NI PXI-4224, l'utilisation de divers accessoires et une gamme d'informations pour profiter pleinement de toutes les fonctionnalités et commodités.

Après un achat réussi de l’équipement/dispositif, prenez un moment pour vous familiariser avec toutes les parties du manuel d'utilisation National Instruments NI PXI-4224. À l'heure actuelle, ils sont soigneusement préparés et traduits pour qu'ils soient non seulement compréhensibles pour les utilisateurs, mais pour qu’ils remplissent leur fonction de base de l'information et d’aide.

Table des matières du manuel d’utilisation

  • Page 1

    PXI NI PXI-4224 User Manual NI PXI-4224 User Manual August 2008 373752G-01[...]

  • Page 2

    Support Worldwide Technical Support and Product Info rmation ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Aust in, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 1800 300 800, Austria 43 662 457990-0, Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599, Canada 800 433 3488, China 86 21 5050 9800,[...]

  • Page 3

    Important Information Warranty The NI PXI-4224 is warranted against defects in ma terials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentati on. National Instruments wil l, at its option, repair or replace equipment that proves to be defect ive during the warranty period. This warrant y[...]

  • Page 4

    Conventions The follo wing con ventions are used in this manual: < > Angle brackets that cont ain numbers s eparated by an ellipsis represent a range of v alues associated with a bit or signal name—for example, AO < 3 . . 0 > . » The » symbol leads you through nested menu items and dialog box options to a final action. The sequence [...]

  • Page 5

    © National Instruments Corpor ation v NI PXI-4224 User Manual Contents Chapter 1 About the NI PXI-4224 What You Need to Get Started .............. .............. .............. .............. .............. .............. .. 1-2 National Instruments D ocumentatio n ............... .............. .............. ............... .............. .... 1[...]

  • Page 6

    Contents NI PXI-4224 User Manual vi ni.com Chapter 5 Using the NI PXI-4224 Developing Your Application .. .................... .............. .............. ........... .............. ............ 5-1 Typical Program Flow Chart.......... ........... .............. .............. .............. ............ 5-1 Overview of Typical Flow Ch art ......[...]

  • Page 7

    Contents © National Instruments Corporat ion vii NI PXI-4224 User Manual Figures Figure 2-1. NI PXI-4224 Front Label ............... .............. .............. ................. .......... 2-3 Figure 2-2. Unshielded Floating Signal So urce Connection Using a D-SUB Connector ..................... ................. .............. .............. .[...]

  • Page 8

    Contents NI PXI-4224 User Manual viii ni.com Tables Table 2-1. NI PXI-4224 25-Pin D-SUB Termin al Pin Assignments ............ ......... 2-2 Table 4-1. Signal Condi tioning Functional Bl ocks .............. .............. ........... ......... 4-3 Table 4-2. PXI Trigger Bus Timing Signals .... ...... .............. .............. .............. ...[...]

  • Page 9

    © National Instruments Corporat ion 1-1 NI PXI-4224 User Manual 1 About the NI PXI-4224 This chapter provides an introducti on to the NI PXI-4224 device and its installation. The NI PXI-4224 is part of the NI PXI-4200 series of data acquisition (D A Q) devices with integrated signal con ditioning. The PXI-4200 series reduces measurement setup and [...]

  • Page 10

    Chapter 1 About the NI PXI-4224 NI PXI-4224 User Manual 1-2 ni.com What Y ou Need to Get Started To set up and use the NI PXI-4224, you need the following: ❑ Hardware –N I P X I - 4 2 2 4 – One of the following: • TB-2725 terminal block • 25-pin D-SUB female connector – PXI or PXI/SCXI combination chassis ❑ Software – NI-D A Q 7.3.1[...]

  • Page 11

    Chapter 1 About the NI PXI-4224 © National Instruments Corporat ion 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 hard ware and softw are in your system. U se the manu als you have [...]

  • Page 12

    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 disconnect ing any signal wires. Refer to the DAQ Getting Started Guide to unpack, instal l, and configure the NI PX I-4224 in a PXI ch[...]

  • Page 13

    © National Instruments Corporat ion 2-1 NI PXI-4224 User Manual 2 Connecting Signals This chapter provides details about the fro nt 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 installed correctly and self-tested the device, [...]

  • Page 14

    Chapter 2 Connecti ng Signals NI PXI-4224 User Manual 2-2 ni.com Caution The PFI 0/CAL SMB connector is for low-v oltage timing and calibration signals only . V oltages greater than ±15 V can damage the de vice. If you are building a 25-pin D-SUB connector for your application, make sure you use a connector and wires that are safety rated for the [...]

  • Page 15

    Chapter 2 Connecting Signals © National Instruments Corporat ion 2-3 NI PXI-4224 User Manual Figure 2-1. NI PXI-4224 Front Label Analog Input Connections The following sections provide a definit ion of the signal source characteristics, descriptions of variou s ways to connect signals to the NI PXI-4224, and electrical diagra ms showing the signa [...]

  • Page 16

    Chapter 2 Connecti ng Signals NI PXI-4224 User Manual 2-4 ni.com In the electrical diagrams, two dif ferent ground symbols are used. These symbols indicate that you cannot assu me that the indicated grounds are at the same potential. Refer to Appendix A, Specifications , for maximum working v oltage specifications . Y ou can make signal connections[...]

  • Page 17

    Chapter 2 Connecting Signals © National Instruments Corporat ion 2-5 NI PXI-4224 User Manual Figure 2-3. Unshielded Grounded Signal Sour ce Connection Using a D-SUB Connector CH 0 CH 7 + – Tw i s ted-P a ir Wiring V S IG V S IG Ground Reference S ign a l S ource AI 0 + AI 0 – AI 7 + AI 7 –[...]

  • Page 18

    Chapter 2 Connecti ng Signals NI PXI-4224 User Manual 2-6 ni.com Figure 2-4. Shield ed Floating Signa l Source Connection Us ing a D-SUB Connector + – AI 0 + AI 0 – CH 0 V S IG S ign a l S ource AI 7 + AI 7 – CH 7 S hielding Tw i s ted-P a ir Wiring[...]

  • Page 19

    Chapter 2 Connecting Signals © National Instruments Corporat ion 2-7 NI PXI-4224 User Manual Figure 2-5. Shielded Grounded Signal Sour ce C onnection Using a D-SUB Connector CH 0 CH 7 S hielding + – Tw i s ted-P a ir Wiring V S IG V S IG Ground Reference S ign a l S ource AI 0 + AI 0 – AI 7 + AI 7 –[...]

  • Page 20

    Chapter 2 Connecti ng Signals NI PXI-4224 User Manual 2-8 ni.com Figures 2-6 through 2- 9 illustrate connecting sign als using a terminal block. Figure 2-6. Unshielded Floating Signal Sour ce Connection Using a T erminal Block + – Tw i s ted-P a ir Wiring AI 0 + AI 0 – CH 0 V S IG S ign a l S ource T er min a l Block AI 7 + AI 7 – CH 7[...]

  • Page 21

    Chapter 2 Connecting Signals © National Instruments Corporat ion 2-9 NI PXI-4224 User Manual Figure 2-7. Unshielded Grounded Signal Source Co nnection Using a T erminal Block Tw i s ted-P a ir Wiring AI 0 + AI 0 – CH 0 AI 7 + AI 7 – CH 7 + – V S IG V S IG Ground Reference S ign a l S ource T ermin a l Block[...]

  • Page 22

    Chapter 2 Connecti ng Signals NI PXI-4224 User Manual 2-10 ni.com Figure 2-8. Sh ielded Floating Signa l Source Connection Us ing a T erminal Block + – Tw i s ted-P a ir Wiring AI 0 + AI 0 – CH 0 V S IG S ign a l S ource T er min a l Block AI 7 + AI 7 – CH 7 S hielding[...]

  • Page 23

    Chapter 2 Connecting Signals © National Instruments Corporat ion 2-11 N I PXI-4224 User Manual Figure 2-9. Shielded Grounded Signal Source C onnection Using a T erminal Block Floating Signal Source Connection Figures 2-2, 2-4, 2-6, and 2-8 illustrate floating signal source conn ections. In this configuration , the signal so u rce being measured is[...]

  • Page 24

    Chapter 2 Connecti ng 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 refere nce that is connected through a conductive path to the instrument gro[...]

  • Page 25

    © National Instruments Corporat ion 3-1 NI PXI-4224 User Manual 3 Configuring and T esting This chapter provides details about confi guring and testing the NI PXI-4224 in MAX, including how to use device test panel s and create and configure NI-DAQmx Tasks and NI-D AQmx Global Channels. V erifying and Self-T esting the Signals Using T est Panels A[...]

  • Page 26

    Chapter 3 Configur ing and T esting NI PXI-4224 User Manual 3-2 ni.com Configuring the NI PXI-4224 in MAX This section describes how to cr eate NI-DAQmx Tasks and NI-DAQmx Global Channels in MAX that allow you to take measurements with the NI PXI-4224. Creating a Voltage T ask or Gl obal Channel Using NI-DAQmx An NI-DAQmx Global Channel gives a phy[...]

  • Page 27

    Chapter 3 Configurin g and T esting © National Instruments Corporat ion 3-3 NI PXI-4224 User Manual V erifying and Self-T esting an NI -DAQmx T ask or Global Channel After you have created an analog input voltage NI-D AQmx Task or NI-DAQmx Global Channel, verify the NI-DAQmx Task or NI-DAQmx Global Channel signal and functio nality using the Test [...]

  • Page 28

    © National Instruments Corporat ion 4-1 NI PXI-4224 User Manual 4 Theor y of Operation This chapter describes the theo ry of operation, measurement considerations, and tim ing information. Theor y of Operation Figure 4-1 illustrates the key functi onal components of the NI PXI-4224, including the DAQ and int egrated signal conditioni ng circuitry.[...]

  • Page 29

    Chapter 4 Theory of Operation NI PXI-4224 User Manual 4-2 ni.com Figure 4-1. Block Diagram of NI PXI-4224 NI-PGA Input Protection AI0 Input Protection AI1 Input Protection AI2 Input Protection AI3 Input Protection AI4 Input Protection AI5 Input Protection AI6 Input Protection AI7 PGA Po s t Filter I S O Amp PGA Po s t Filter I S O Amp PGA Po s t Fi[...]

  • Page 30

    Chapter 4 Theory of Ope ration © National Instruments Corporat ion 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 desi gned to provide application-specifi c signal conditioning, DA Q, and integrated field wiring connect ivity on t[...]

  • Page 31

    Chapter 4 Theory of Operation NI PXI-4224 User Manual 4-4 ni.com Figure 4-2. Effect o f Input Impeda nce on Signal Measurements Although R S does not influence DC measurements, take care when measuring A C signals since C IN attenuates higher frequencies if R S is too large. F or example: Common-Mode Rejection Ratio The ability of a measurement dev[...]

  • Page 32

    Chapter 4 Theory of Ope ration © National Instruments Corporat ion 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, yo u can use an analog or digital filter, or both, t o further reduce the re sidual error left from the finite CMRR of the instru[...]

  • Page 33

    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 e xternal signals PFI 0, PXI_T rig<0..5>, and PXI_Star , and the Ctr 0 Internal Output. Programmable Function Inputs PFI 0 is connected to the front SM[...]

  • Page 34

    Chapter 4 Theory of Ope ration © National Instruments Corporat ion 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 contr olling A/D conversions, digital-to-analo g converter (DAC) updates, or general-purpose signals at the I/O co[...]

  • Page 35

    Chapter 4 Theory of Operation NI PXI-4224 User Manual 4-8 ni.com Figure 4-4 shows this signal connection scheme. Figure 4-4. NI PXI-4224 PXI T rigger Bus Signal Connection PXI Bu s Connector S witch RT S I S witch PXI T rigger<7> PXI T rigger<0..5> DAQ - S TC AI S T ART TRIG AI REF TRIG AI CONV CLK AI S AMP CLK AI P A U S E TRIG AI S AM[...]

  • Page 36

    Chapter 4 Theory of Ope ration © National Instruments Corporat ion 4-9 NI PXI-4224 User Manual T able 4-2 provides more informatio n about each of the timing signals av ailable on the PXI trigger bus. For more detailed timing signal information, refer to Appendix B, Timing Sig nal Information . Table 4-2. PXI T rigger Bus Timing Signals Signal Dir[...]

  • Page 37

    © National Instruments Corporat ion 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 LabV IEW, and how to calibrate the device. Developing Y our Application This section describes the software and programming steps necessary to use the NI PXI-4224. For more info rmati[...]

  • Page 38

    Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-2 ni.com Figure 5-1. T ypical Program Flowchart No No No No No No Configure Ch a nnel s Re a d Me as urement Adju s t Timing S etting s S top Me as urement Cre a te T as k U s ing DAQ A ss i s t a nt? Ye s Ye s Ye s Ye s Ye s Ye s Cre a te T as k in DAQ A ss i s t a nt or MAX Fur ther Config[...]

  • Page 39

    Chapter 5 Using the NI PXI-4224 © National Instruments Corporat ion 5-3 NI PXI-4224 User Manual Over view of T ypical Flow Chart The following section s briefly discuss some con siderations for some of the steps in Figure 5-1. These sections ar e meant to provide an overview of some of the options and features available when programming with NI-DA[...]

  • Page 40

    Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-4 ni.com When programmat ically adjusting tim ing settin gs, you can set the task t o acquire continuously , acquire a b uf fer of samples, or acquire one point at a time. For continuous and buf fered acquisitions, you can set the acquisition rate and the number of samples to read. By defaul[...]

  • Page 41

    Chapter 5 Using the NI PXI-4224 © National Instruments Corporat ion 5-5 NI PXI-4224 User Manual Acquiring, Analyzin g, and Presenting After configuring the task and channels , you can start y our acquisition, read measurements, analyze the data return ed, and display it according to the needs of your applicatio n. Typical meth ods of analysis incl[...]

  • Page 42

    Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-6 ni.com Table 5-2. Pro gramming a T ask in LabVIEW Flowchart Step VI or Program Step Create T ask in DA Q Assistant Create a DAQmx Task Name Constant located on the Controls »All Con trols» I/O»DAQm x Name Contr ols subpalette, right-click it, and select New Task (DAQ Assistant) . Create[...]

  • Page 43

    Chapter 5 Using the NI PXI-4224 © National Instruments Corporat ion 5-7 NI PXI-4224 User Manual Using a DAQmx Channel Prop erty Node in LabVIEW You can use property no des in LabVIEW to m anually configure you r channels. To create a LabVIEW prope rty node, complete the following steps: 1. Launch LabVIEW . 2. Y ou can create the proper ty node in [...]

  • Page 44

    Chapter 5 Using the NI PXI-4224 NI PXI-4224 User Manual 5-8 ni.com 8. Once you hav e added the property to the property node, right-click the terminal to change the at tributes of the property , or to add a control, constant, or indicator . 9. T o add another pro perty to th e property node, right-click an existing property and left-click Add Eleme[...]

  • Page 45

    Chapter 5 Using the NI PXI-4224 © National Instruments Corporat ion 5-9 NI PXI-4224 User Manual Figure 5-2. General Synchronizing Flowchart Ye s No Ye s No Configure M as ter Timing Re a d Me as urement Cre a te a M as ter T as k (option a l) Cre a te M as ter AI V olt a ge Ch a nnel s Configure M as ter Ch a nnel Get M as ter Timeb as e S ource a[...]

  • Page 46

    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 Help»VI, Function, & How-To Help from the La[...]

  • Page 47

    Chapter 5 Using the NI PXI-4224 © National Instruments Corporat ion 5-11 N I PXI-4224 User Manual Other Application Documentation and Material The following location s provide more information that you may find useful when setting up o r connecting signal sources or programming y our application. • LabVIEW Example Programs, av ailable by selecti[...]

  • Page 48

    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 p rocess of minimizing measurem ent errors. On the NI PXI-4224, errors from the digitizer components of the DAQ device circuitry are corrected in the anal og circuitry by onb oard calibration digital-to-analog conv erters (CalDA[...]

  • Page 49

    Chapter 5 Using the NI PXI-4224 © National Instruments Corporat ion 5-13 N I PXI-4224 User Manual 4. Right-click the NI PXI-4224 and sel ect Self-Cali brate . 5. A dialog box opens indicating that the NI PX I-4224 is self-calibrating. 6. When the dialog box closes, the NI PXI-4224 is successfully self-calibrated. Note The NI PXI-4224 also can be s[...]

  • Page 50

    © National Instruments Corporat ion 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. Over voltage Protection Powered on or off .................... .............. . 42.4 V peak or 60 VDC max PFI 0/CAL SMB connector.....[...]

  • Page 51

    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 impeda nce Powered on ............... .............. .........100 M Ω para[...]

  • Page 52

    Appendix A Specificati ons for © National Instruments Corporat ion 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 error relative to input (RTI) ....... ................. .... 865 mV max Signal cond[...]

  • Page 53

    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 Coupling .............. ............... [...]

  • Page 54

    Appendix A Specificati ons for © National Instruments Corporat ion A-5 NI PXI-4224 User Manual Weight ......... .............. .............. .............. . 279 g (9.8 oz) Analog input signal connect o r ............... 25-Pin D-SUB Maximum W orking Voltage (Signal + common- mode) each input should remain within 42.4 V peak or 60 VDC of ground. [...]

  • Page 55

    Appendix A Specifications for NI PXI-4224 User Manual A-6 ni.com Safety This product meets the requirements of the follow ing standards of safety for electrical equipment for measurement, contro l, 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 [...]

  • Page 56

    Appendix A Specificati ons for © National Instruments Corporat ion A-7 NI PXI-4224 User Manual Environmental Management NI is committed to designing and manufacturing products in an environmentally responsible man ner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers[...]

  • Page 57

    © National Instruments Corporat ion B-1 NI PXI-4224 User Manual B T iming Signal Information This appendix contains additional infor mation about the timing signals discussed in Chapter 4, Theory of Operation . Connecting T iming Signals Caution Exceeding the maximum input v oltage ratings listed in Appendix A, Specifications , can damage the devi[...]

  • Page 58

    Appendix B T iming Signal Informati on NI PXI-4224 User Manual B-2 ni.com DAQ T iming Connections The timing signals are AI ST AR T T RIG, AI REF TRIG, AI SAMP CLK, AI CONV CLK, AI P A USE TRIG, AI SAMPLE CLK TI MEBASE, and AI HOLD COMPLETE. Posttriggered DA Q allows you to vie w data that is acquired after a trigger ev ent is recei ved. Figure B-1[...]

  • Page 59

    Appendix B T iming Signal In formation © National Instruments Corporat ion B-3 NI PXI-4224 User Manual AI ST ART TRIG Signal The AI ST AR T TRIG signal can b e input or out put through PFI 0, PXI_Trig<0..5>, or PXI_Star . As an input, AI START TRIG is conf igured in the ed ge-detection mode. Y ou can select PFI 0 as the source for AI START T[...]

  • Page 60

    Appendix B T iming Signal Informati on NI PXI-4224 User Manual B-4 ni.com The device also uses AI START TRIG to initiate pretriggered operations . In pretriggered applicat ions, AI STAR T TRIG is gen erated by a software trigger unless a PFI pin is selected as the source of AI START TRIG. Refer to the AI REF TRIG Signa l section for a complete desc[...]

  • Page 61

    Appendix B T iming Signal In formation © National Instruments Corporat ion 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 e xternally input from PFI 0, PXI_T rig<0..5>, or PX I_Star . It can be output on any PXI trigger bus line. Refer to Figures B-1 and B-2 for the r[...]

  • Page 62

    Appendix B T iming Signal Informati on NI PXI-4224 User Manual B-6 ni.com Figures B-7 and B-8 show the input and output timing requirements f o rA IS A M PC L K . Figure B-7. AI SAMP CLK Input Signal Timing Figure B-8. AI SAMP CLK Output Signal T iming The AI CONV CLK pulses are masked off until the de vice generates AI SAMP CLK. If you use interna[...]

  • Page 63

    Appendix B T iming Signal In formation © National Instruments Corporat ion B-7 NI PXI-4224 User Manual AI SAMP CLK generates a con version. 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. Th e AI START TRIG signal starts this counter , and[...]

  • Page 64

    Appendix B T iming Signal Informati on 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 tim e is a function of temperature and does not vary from one con vers ion to the next. Separate the AI CONV CLK pulses by at least one con vers[...]

  • Page 65

    Appendix B T iming Signal In formation © National Instruments Corporat ion 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 TIMEB ASE signal, which is not available as an output on the I/O connector . The onboard s can interv al (SI) counter uses AI SAMPLE CLK[...]

  • Page 66

    Appendix B T iming Signal Informati on NI PXI-4224 User Manual B-10 ni.com AI HOLD COMPLETE Signal AI HOLD COMPLETE is an output-only si gnal that generate s a pulse with the leading edge occurring approxim ately 50 to 100 ns after an A/D con version be gins. The polarity of this ou tput is software configurable, b ut the polarity is typically conf[...]

  • Page 67

    © National Instruments Corporat ion C-1 NI PXI-4224 User Manual C Removing the NI PXI-4224 This appendix provides details for remo ving an NI PXI-4224 device from MAX and from a PXI or PXI/SCXI combination chassis. Note Y ou must physically remove the NI PXI-4224 from the chassis before you can remov e it from MAX. Removing the NI PXI-4224 from a [...]

  • Page 68

    Appendix C Remov ing the NI PXI-42 24 NI PXI-4224 User Manual C-2 ni.com Figure C-1. Injector/Ejector Handle Position Before De vice Removal Removing the NI PXI-4224 from MAX T o remove an NI PXI-4224 device from MAX, complete t he following steps after launching MAX: 1. Expand Devices and Interfaces to display the list o f installed devices and in[...]

  • Page 69

    © National Instruments Corporat ion D-1 NI PXI-4224 User Manual D Common Questions This appendix lists common questions rel ated to the use of the NI PXI-4224. Which version of NI-D A Q works with the NI PXI-4224 and how do I get the most curr ent version of NI-D A Q? Y ou must hav e NI-D A Q 7.3.1 or later and use NI-D A Qmx. 1. Go to ni.com . 2.[...]

  • Page 70

    Appendix D Co mmon Questions NI PXI-4224 User Manual D- 2 ni.com How do I perf orm an external calibration of the NI PXI-4224? As of the NI PXI-4224 release, an external calibration document is not av ailable. T o check the av ailability of an NI P XI-4224 external calibration document is go to ni.com/calibration and click Manual Calibrat ion Proce[...]

  • Page 71

    © National Instruments Corporat ion G-1 NI PXI-4224 User Manual Glossar y Symbol Pref ix V alue pp i c o 1 0 –1 2 nn a n o 1 0 –9 μ micro 10 –6 m milli 10 –3 k kilo 10 3 Mm e g a 1 0 6 Gg i g a 1 0 9 Tt e r a 1 0 12 Symbols /P e r . ° Degree. % Percent. + Positiv e of, or plus. – Negati v e of, or minus. Ω Ohm. A A Amperes. A/D Analog[...]

  • Page 72

    Glossary NI PXI-4224 User Manual G- 2 ni.com ADC Analog-to-digital con verter—An elect ronic de vice, often an integrated circuit, that con v erts an an alog v oltage to a digital number . ADE Application development en v ironment. AI Analog input. AI CONV CLK Con vert signal. AI HOLD COMPLETE Scan clock signal. AI P A USE TRIG Analog input gate [...]

  • Page 73

    Glossary © National Instruments Corporat ion G-3 NI PXI-4224 User Manual CMR Common-mode rejection. CMRR Common-mode rejection ratio—A meas ure of an instrument’ s abilit y to reject interference from a common-m ode signal, usually expressed in decibels (dB). common-mode signal Any v oltage present at the in strumentation amplifier inputs with[...]

  • Page 74

    Glossary NI PXI-4224 User Manual G- 4 ni.com DMA Direct memory access—A method by which data can be transferred to/from computer memory from/t o a device or memory on the bus while the processor does something else. DMA is th e fastest method of tran sferring data to/from co mputer memo ry . DNL Differentia l nonlinear it y —A m ea s u re i n l[...]

  • Page 75

    Glossary © National Instruments Corporat ion G-5 NI PXI-4224 User Manual H h Hour or hours. Hz Hertz—The number of scans read or updates written per second. I I/O Input/output—The transfer of data to/from a computer sy stem in volving communications channels, operator interface de vices, and/or DA Q and control interf aces. in. Inch or inches.[...]

  • Page 76

    Glossary NI PXI-4224 User Manual G- 6 ni.com L LabVIEW Laboratory V irtual Instrument Engin eering W orkbench—A program dev elopment application based o n the programming language G and used commonly for test and measurement purposes. LED Light-emitting diode. linearity The adherence of de vice resp onse to the equation R = KS, where R = response[...]

  • Page 77

    Glossary © National Instruments Corporat ion G-7 NI PXI-4224 User Manual N NI-D A Qmx The latest NI-D A Q dri ver with ne w VIs, functions, and development tools for controlling measurement de vices. noise An undesirable electrical signal—Nois e comes from external sources such as the A C power line, motors, generators, transforme rs, fluorescen[...]

  • Page 78

    Glossary NI PXI-4224 User Manual G- 8 ni.com R relati ve accurac y A measure in LSB of the accura cy of an ADC. It includes all nonlinearity and quantization errors. It does not in clude offset and gain errors of the circuitry feeding the ADC. resolution The smallest signal increment that can be detected by a measurement system. Resolution can be e[...]

  • Page 79

    Glossary © National Instruments Corporat ion G-9 NI PXI-4224 User Manual SCXI Signal Conditioning eXtensions f or Instrumentation—The NI product line for conditioning low-le vel signals within an external chassis near sensors so only high-level signals are sent to D A Q devices in the noisy PC en vironment. self-calibrating A property of a DA Q [...]

  • Page 80

    Glossary NI PXI-4224 User Manual G-10 ni.com W wa veform Multiple voltage readings taken at a specific sampling rate. working voltage The highest voltage with respect to ground that should be appli ed to an input terminal during normal use, normall y well under the breakdown voltage for safety margin. Includes both the signal and common-mode voltag[...]

  • Page 81

    © National Instruments Corporat ion I-1 NI PXI-4224 User Manual Index A AI CONV CLK signal input signal timing (figure), B-7 output signal timing (figure), B-8 ov ervie w, B-7 signal routing (figure), 4-6 AI HOLD COMPLETE signal description (table), 4-9 overv iew , B -1 0 signal timi ng (fi gure), B-10 AI P A USE TRIG signal description (table), 4[...]

  • Page 82

    Index NI PXI-4224 User Manual I-2 ni.com pre-calibration errors, A-3 self-calibration, 5-12 specifications, A-3 CE compliance specif ications, A-6 channel properties, configuring in application development (table), 5-4 in LabVIEW, 5-7 clocks, P XI, 4-7 See also D A Q timing connecti ons See also PXI trigger bus common questi ons, D-1 common-mode re[...]

  • Page 83

    Index © National Instruments Corporat ion I-3 NI PXI-4224 User Manual F floating signal source conn ection connecting to NI PXI-4224, 2-11 front signal connector, 2-1 front label of NI PXI-4 224 (figure), 2-3 signal assignments of NI PXI-4224 (table), 2-2 G global channel creating, 3-2 verifying, 3-3 ground-referenced signal connection connecting [...]

  • Page 84

    Index NI PXI-4224 User Manual I-4 ni.com signal conditioning overview, 4-3 timing and control overview, 4-5 NI-D A Q soft ware, 1-3, D-1 NI-D A Qmx ch annel properties, configuring (table), 5-4 NI-D A Qmx Global Channel creating, 3-2 verifying and self-testing, 3-3 NI-D A Qmx T ask creating, 3-2 verifying and self-testing, 3-2 O operation theory . [...]

  • Page 85

    Index © National Instruments Corporat ion I-5 NI PXI-4224 User Manual specifications analog input, A-1 calibration, A-3 CE compliance, A-6 digital triggers, A -3 electromagnetic comp atibility, A-6 en vironmental, A-5 maximum working voltage, A-5 memory, A-3 ov ervoltage protection, A-1 PCI bus interf ace, A-4 physical, A-4 power requirements, A-4[...]