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PC-516/DAQCard-516 User Manual

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1. National Instruments Corporation Customer Communication For your convenience this appendix contains forms to help you gather the information necessary to help us solve your technical problems and a form you can use to comment on the product documentation When you contact us we need the information on the Technical Support Form and the configuration form if your manual contains one about your system configuration to answer your questions as quickly as possible National Instruments has technical assistance through electronic fax and telephone systems to quickly provide the information you need Our electronic services include a bulletin board service an FTP site a FaxBack system and e mail support If you have a hardware or software problem first try the electronic support systems If the information available on these systems does not answer your questions we offer fax and telephone support through our technical support centers which are staffed by applications engineers Electronic Services Bulletin Board Support National Instruments has BBS and FTP sites dedicated for 24 hour support with a collection of files and documents to answer most common customer questions From these sites you can also download the latest instrument drivers updates and example programs For recorded instructions on how to use the bulletin board and FTP services and for BBS automated information call 512 795 6990 You can access these ser
2. PC 516 DAQCard 516 User Manual Multifunction I O Devices May 1996 Edition Part Number 321178A 01 Copyright 1996 National Instruments Corporation All Rights Reserved Internet Support GPIB gpib support natinst com DAQ daq support natinst com VXI vxi support natinst com LabVIEW lv support natinst com LabWindows lw support natinst com HiQ hiq support natinst com E mail info natinst com FTP Site ftp natinst com Web Address http www natinst com Bulletin Board Support BBS United States 512 794 5422 or 800 327 3077 BBS United Kingdom 01635 551422 BBS France 1 48 65 15 59 FaxBack Support 512 418 1111 Q gt Telephone Support U S Tel 512 795 8248 Fax 512 794 5678 lt gt International Offices Australia 03 9 879 9422 Austria 0662 45 79 90 0 Belgium 02 757 00 20 Canada Ontario 519 622 9310 Canada Qu bec 514 694 8521 Denmark 45 76 26 00 Finland 90 527 2321 France 1 48 14 24 24 Germany 089 741 31 30 Hong Kong 2645 3186 Italy 02 413091 Japan 03 5472 2970 Korea 02 596 7456 Mexico 95 800 010 0793 Netherlands 0348 433466 Norway 32 84 84 00 Singapore 2265886 Spain 91 640 0085 Sweden 08 730 49 70 Switzerland 056 200 51 51 Taiwan 02 377 1200 U K 01635 523545 National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin TX 78730 5039 Tel 512 794 0100 Important Information Warranty Copyright Trademarks The PC 516 and DAQCard 51
3. Abbreviations acronyms metric prefixes mnemonics symbols and terms are listed in the Glossary PC 516 DAQCard 516 User Manual x National Instruments Corporation About This Manual National Instruments Documentation The PC 516 DAQCard 516 User Manual is one piece of the documentation set for your data acquisition DAQ system You could have any of several types of manuals depending on the hardware and software in your system Use the manuals you have as follows National Instruments Corporation Getting Started with SCXI If you are using SCXI this is the first manual you should read It gives an overview of the SCX system and contains the most commonly needed information for the modules chassis and software Your SCX user manuals If you are using SCXI read these manuals next for detailed information about signal connections and module configuration They also explain in greater detail how the module works and contain application hints Your DAQ hardware user manuals These manuals have detailed information about the DAQ hardware that plugs into or is connected to your computer Use these manuals for hardware installation and configuration instructions specification information about your DAQ hardware and application hints Software documentation Examples of software documentation you may have are the LabVIEW and LabWindows CVI manual sets and the NI DAQ documentation After you set up your hardware
4. Chapter 2 Installation and Configuration Considerations for using the DIFF configuration are discussed in Chapter 3 Signal Connections Notice that the signal return path is through the negative terminal of the instrumentation amplifier and through channel 4 5 6 or 7 depending on which channel pair you select Digital 1 0 Configuration The device always uses one 4 bit digital output port and one 4 bit digital input port Counter Configuration You can use the MSM82C54 counter timers for general purpose applications such as pulse and square wave generation event counting and pulsewidth time lapse and frequency measurement For information about configuring the MSM82CS4 see the Timing Connections section of Chapter 3 Signal Connections National Instruments Corporation 2 7 PC 516 DAQCard 516 User Manual Chapter Signal Connections This chapter describes how to make input and output signal connections to your PC 516 and DAQCard 516 If you are making your own cables see Appendix B Custom Cable Design 1 0 Connectors Figure 3 1 shows the pin assignments for your 1 0 connector and CB 27 connector block Although the pin arrangements on these connectors differ notice that the signal names and pin numbers are the same J Warning Connections that exceed any of the maximum ratings of input or output signals on the 516 device can damage your 516 device and your computer This includes connecting a
5. GATE2 signal table 3 3 general purpose counter and timing signal connections 3 15 to 3 19 event counting 3 16 application with exterior switch gating figure 3 16 frequency measurement 3 17 application figure 3 17 pulse and square wave generation 3 16 pulse width measurement 3 16 time lapse measurement 3 17 ground referenced signal sources analog input signal connections 3 5 to 3 7 differential connection considerations 3 9 differential input connections 3 10 recommended input configurations table 3 6 National Instruments Corporation 1 3 Index VO connectors See also signal connections custom cable pin assignments figure B 2 exceeding maximum ratings warning 3 1 pin assignments figure 3 2 signal connection descriptions table 3 3 to 3 4 input multiplexer 4 4 installation See also configuration procedure for installation 2 1 to 2 2 unpacking the 516 device 1 6 instrumentation amplifier figure 3 6 L LabVIEW and LabWindows CVI application software 1 3 manual See documentation MSM82C54 counter timer 4 7 to 4 8 multichannel scanned data acquisition 4 6 multiplexer input 4 4 NC signal table 3 4 NI DAQ driver software 1 3 to 1 4 0 OUT signal timing connections See CLK GATE and OUT signal timing connections OUT signal table 3 3 OUT 2 signal table 3 4 PC 516 DAQCard 516 User Manual Index P PC 516 DAQCard 516 See also theory of operati
6. clock input signal complementary metallic oxide semiconductor common mode rejection ratio counter National Instruments Corporation G 1 PC 516 DAQCard 516 User Manual Glossary D D A DAQ DAVAIL DC DGND DIN DOUT E EISA EXTCONV F FIFO GATE Hz VO lou lo Tout ISA digital to analog data acquisition data available signal direct current digital ground signal digital input signal digital output signal Extended Industry Standard Architecture external convert signal to trigger A D conversions first in first out gate input signal hertz input output current output high current output low output current Industry Standard Architecture LED light emitting diode LSB least significant bit M MB megabytes of memory MSB most significant bit mux multiplexer PC 516 DAQCard 516 User Manual G 2 National Instruments Corporation NC OUT P PCMCIA VCC VDC Vin Vit Vin VoL National Instruments Corporation G 3 Glossary not connected signal output signal Personal Computer Memory Card International Association read root mean square samples seconds Signal Conditioning eXtensions for Instrumentation transistor transistor logic volts positive supply voltage from the PCMCIA bus usually 5V volts direct current volts input high volts input low volts in volts output high volts output low write PC 516 DAQCard 516 User Manual
7. 516 device bold bold italic italic Macintosh monospace NI DAQ PC The following conventions are used in this manual Angle brackets containing numbers separated by an ellipsis represent a range of values associated with a bit port or signal name for example ACH lt 0 7 gt stands for ACHO through ACH7 516 device is a generic term to denote both the PC 516 and DAQCard 516 Bold text denotes menus menu items or dialog box buttons or options Bold italic text denotes a note caution or warning Italic text denotes emphasis a cross reference or an introduction to a key concept Macintosh refers to Macintosh and PowerBook computers equipped with a Type II PCMCIA 5 V capable slot Text in this font denotes text or characters that are to be literally input from the keyboard sections of code programming examples and syntax examples This font is also used for the proper names of disk drives paths directories programs subprograms subroutines device names functions variables file names and extensions and for statements and comments taken from program code NI DAQ refers to the NI DAQ software for PC compatibles or Macintosh unless otherwise noted PC refers to the IBM PC XT PC AT Personal System 2 and laptop compatible computers that are equipped with a PCMCIA standard version 2 0 or later bus interface and Type II 5 V capable slot PC also refers to PCMCIA when referring to a Macintosh system
8. Numbers 1 MHz signal table 3 3 5 V signal table 3 3 A A D FIFO 4 4 to 4 5 ACH lt 0 7 gt signal analog input signal connections 3 4 description table 3 3 differential mode 3 7 single ended mode 3 7 ADC 15 bit sampling 4 4 AIGND signal analog input signal connections 3 4 description table 3 3 analog input circuitry block diagram 4 4 theory of operation 4 4 to 4 5 analog input configuration 2 5 to 2 6 DIFF input 2 6 to 2 7 RSE input 2 6 analog input signal connections 3 4 to 3 13 differential connection considerations 3 9 to 3 13 common mode signal rejection considerations 3 12 to 3 13 floating signal sources 3 11 to 3 12 grounded signal sources 3 10 DIFF input 3 7 exceeding input signal range warning 3 4 floating signal sources 3 5 ground referenced signal sources 3 5 input configurations 3 5 to 3 7 signal connection considerations 3 4 National Instruments Corporation Index single ended connection considerations 3 7 to 3 8 SE input 3 7 types of signal sources and measurement systems 3 5 analog input specifications amplifier characteristics A 2 dynamic characteristics A 2 input characteristics A 1 stability A 2 transfer characteristics A 1 to A 2 base I O selection PC 516 2 4 to 2 5 bulletin board support E 1 bus interface circuitry figure 4 3 specifications A 3 bus related configuration PC 516 2 4 to 2 5 C cables CB 27 cable termination
9. PC 516 Register Level Programmer Manual for the programming sequence needed to enable this input Figure 3 7 shows the timing requirements for the EXTCONV input An A D conversion is initiated by arising edge on the EXTCONV The data from this conversion is latched into the FIFO memory within 20 ps The EXTCONV input is a TTL compatible signal EXTCONV tw 200 ns minimum tint 20 ps minimum A D interval St E A D Conversion Starts Here Figure 3 7 EXTCONV Signal Timing Notice that EXTCONV can only cause conversions to occur you cannot use it as a monitor to detect conversions caused by the onboard sample interval timer General Purpose Counter and Timing Signal Connections The general purpose timing signals include CLK and OUT signals for counter 1 and GATE CLK and OUT signals for counter 2 of the MSM82C54 Counter 0 is not available on the I O connector You can use the MSM82C54 counter timers for general purpose applications such as pulse and square wave measurement For these applications CLK and GATE signals are sent to the counters and the counters are programmed for various operations The only exceptions are counter 0 which has an internal 1 MHz clock and its gate is always enabled and counter 1 which has its gate always enabled National Instruments Corporation 3 15 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections The MSM82C54 counter timer is described briefly in Chapter 4 Theory of
10. loaded value minus the read value multiplied by the CLK2 period To measure frequency program counter 2 to be level gated and count the number of falling edges in a signal applied to the CLK2 input The gate signal you applied to the GATE2 input is of a known duration In this case program counter 2 to count falling edges at the CLK2 input while the gate is applied The frequency of the input signal then equals the count value divided by the gate period Figure 3 9 shows the connections for a frequency measurement application You could also use counter 1 to generate the gate signal in this application Gate Source I ye NZ I O Connector PC 516 or DAQCard 516 Figure 3 9 Frequency Measurement Application National Instruments Corporation 3 17 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections The CLK and OUT signals for counter 1 are available at the I O connector The GATE CLK and OUT signals for counter 2 are available at the I O connector In addition the GATE and CLK pins are pulled up to 5 V through a 100 kQ resistor Figure 3 10 shows the timing requirements for the GATE and CLK input signals and the timing specifications for the OUT output signals of the MSM82C54 PC 516 DAQCard 516 User Manual Absolute maximum voltage input rating of 0 5 to 5 0 V with respect to DGND MSM82C54 digital input specifications referenced to DGND Vy input logic high voltage 2 2 V minimum Vj input log
11. Appendix D Power Management Modes for more information Resources 1 How do I determine if I have a memory conflict If no PC Cards are working at all it is probably because a memory window is not usable Card Services uses a 4 KB memory window for its own internal use If the memory cannot be used then Card Services cannot read the Card Information Structure CIS from the card EPROM which means it cannot identify cards There are two different methods you can use when Card Services has a problem reading the CIS First you can determine which memory window Card Services is using and then exclude that window from use PC 516 DAQCard 516 User Manual C 2 National Instruments Corporation Appendix C PC Card Questions and Answers by Card Services and or the memory manager Second you can attempt to determine all of the memory that Card Services can possibly use and then exclude all but that memory from use by Card Services 2 How do I determine all of the memory that Card Services can use One way to find out which memory addresses Card Services can use is to run a utility such as MSD EXE that scans the system and tells you how the system memory is being used For example if you run such a memory utility and it tells you that physical addresses C0000 to C9FFF are being used for ROM access then you know that C8000 D3FFF is an invalid range for Card Services and should be changed to CA000 D3FFF 3 How can I find usable I O
12. Bus Interface Circuitry Block Diagram Analog Input and Data Acquisition Circuitry Each 516 device has 8 channels of analog input with 16 bit A D conversion Using the timing circuitry each 516 device can also automatically time multiple A D conversions Figure 4 3 shows a block diagram of the analog input and data acquisition circuitry National Instruments Corporation PC 516 DAQCard 516 User Manual Chapter 4 Theory of Operation Instrumentation Amplifier 2 16 Bit ROOMY 2 Word Sampling 1 51 1 0 Channel FIFO AD ADC Interface Data A D RD g DAVAIL EE Interrupt Counter Interface MSM82C54 A D Timing Figure 4 3 Analog Input and Data Acquisition Circuitry Block Diagram I O Connector c fa a O g lt O 2 O Q Analog Input Circuitry The analog input circuitry consists of an input multiplexer a buffer and a 16 bit sampling ADC The data is stored in a 512 word deep FIFO memory The input multiplexer is an 8 channel CMOS analog input multiplexer In single ended mode the input multiplexer selects one of eight analog input channels channels 0 through 7 In differential mode the input multiplexer switches between differential pairs 0 4 1 5 2 6 3 7 With the input multiplexer stage input overvoltage protection of 25 V is available powered on or off Each 516 device uses a 16 bit successive approximation ADC The ADC has a fixed input range of 5 V When an
13. You should remove your memory manager by commenting it out of the CONFIG SYS file Next you can rerun the memory utility Memory National Instruments Corporation C 3 PC 516 DAQCard 516 User Manual Appendix C PC Card Questions and Answers managers often consume an enormous amount of memory and you will need to determine what memory is really usable by Card Services When you have determined what memory is available for Card Services reinstall your memory manager and make the necessary changes to provide Card Services with the memory needed We suggest that you use the minimum amount of memory for Card Services namely 4 to 12 KB which frees more memory for the memory manager Resource Conflicts 1 How do I resolve conflicts between my memory manager and Card Services Card Services can usually use memory space that is not being used for real RAM on the system Even when this is the case you should still exclude the memory addresses used by Card Services from use by any memory manager that may be installed PC 516 DAQCard 516 User Manual C 4 National Instruments Corporation Power Management Modes This appendix describes the power management modes of the DAQCard 516 National Instruments Corporation Normal Mode This is the normal operating mode of the DAQCard 516 in which all the circuits are fully functional This mode draws about 60 mA from the 5 V supply about 300 mW Power Down Mode In this mode the
14. addresses Finding usable I O addresses is done by trial and error Of the three resources used memory I O interrupts I O conflicts will be low You can use WDAQCONF in Windows to diagnose I O space conflicts When you have configured DAQCONF or WDAQCONF for a particular I O space save the configuration If there is a conflict the configuration utility will report an error describing the conflict 4 How do I find usable interrupt levels Some utilities such as MSD EXE will scan the system and display information about what is using hardware interrupts If you have such a utility you can run it to determine what interrupts Card Services can use Card Services needs an interrupt for itself as well as one interrupt for each PCMCIA socket in the system For example in a system with two PCMCIA sockets at least three interrupts should be allocated for use by Card Services Keep in mind that utilities such as MSD EXE will sometimes report that an interrupt is in use when it really is not For example if the computer has one serial port COM1 and one parallel port LPT1 you know that IRQs 4 and 7 are probably in use In general IRQS is used for LPT2 but if the computer does not have two parallel ports IRQ5 should be usable IRQ3 is used for COM2 but if the computer has only has one serial port IRQ3 should be usable 5 I run a memory utility and it appears there is no memory available for Card Services What should I do
15. eeseeeeeeeeeeeeseesseeneeeenee 4 7 Figure 4 5 Timing I O Circuitry Block Diagram 0 eee ececeeceseeeeeeeseeeeseeeees 4 8 Figure 4 6 Counter Block Diaerainii ccccsicciecischascses cccncecsdecccnscesiaaoncstcbtnaaniadesbestetvess 4 9 Figure B 1 DAQCard 516 I O Connector Pin Assignments B 2 National Instruments Corporation vij PC 516 DAQCard 516 User Manual Table of Contents Tables Table 2 1 Analog Input Modes for the 516 Device 0 ee cceeeesesereeeeseeneeeseeseeees 2 6 Table 3 1 Recommended Input Configurations for Ground Referenced and Floating Measurement Systems 3 6 Table D 1 DAQCard 516 Power Management Modes D 2 PC 516 DAQCard 516 User Manual viii National Instruments Corporation About This Manual This manual describes the mechanical and electrical aspects of the PC 516 and DAQCard 516 and contains information concerning their installation and operation The PC 516 and DAQCard 516 are compact low cost low power analog input digital I O and timing I O devices Organization of this Manual The PC 516 DAQCard 516 User Manual is organized as follows e Chapter 1 Introduction describes the PC 516 and DAQCard 516 lists the optional software and optional equipment and explains how to unpack your 516 device e Chapter 2 Installation and Configuration describes
16. how to install and software configure your 516 device e Chapter 3 Signal Connections describes how to make input and output signal connections to your PC 516 and DAQCard 516 If you are making your own cables see Appendix B Custom Cable Design e Chapter 4 Theory of Operation includes an overview of the PC 516 and DAQCard 516 and explains the operation of each functional unit making up your 516 device e Appendix A Specifications lists the specifications of the PC 516 and DAQCard 516 e Appendix B Custom Cable Design describes the pin connections on the PC 516 and DAQCard 516 which you will need only if you are designing your own cable e Appendix C PC Card Questions and Answers contains a list of common questions and answers relating to PC Card PCMCIA operation e Appendix D Power Management Modes describes the power management modes of the DAQCard 516 e Appendix E Customer Communication contains forms you can use to request help from National Instruments or to comment on our products National Instruments Corporation ix PC 516 DAQCard 516 User Manual About This Manual e The Glossary contains an alphabetical list and description of terms used in this manual including acronyms abbreviations metric prefixes mnemonics and symbols e The Index alphabetically lists topics covered in this manual including the page number where you can find the topic Conventions Used in This Manual lt gt
17. is used internally for data acquisition timing The gate signal of counter 1 is internally pulled up and is always active Figure 4 5 shows a block diagram of both groups of timing I O circuitry National Instruments Corporation 4 7 PC 516 DAQCard 516 User Manual Chapter 4 Theory of Operation A D Conversion Logic CTR RD WR 1 MHz 1 MHz Clock CLK1 1 0 Connector c rad O g lt QO 2 O ou lt a MSM82C54 Counter Timer Interrupt Interface Figure 4 5 Timing 1 0 Circuitry Block Diagram The MSM82C54 contains three independent 16 bit counter timers and one 8 bit Mode Register As shown in Figure 4 5 counter 0 is used for data acquisition timing and counters 1 and 2 are free for general use All three counter timers can be programmed to operate in several useful timing modes The programming and operation of the MSM82C54 is presented in detail in the optional DAQCard 500 516 and PC 516 Register Level Programmer Manual The MSM82C54 for counter 0 uses a 1 MHz clock generated from the onboard oscillator This 1 MHz clock is also available on the cable I O connector which you can use as a timebase for counters 1 and 2 The 16 bit counters in the MSM82C54 can be diagrammed as shown in Figure 4 6 PC 516 DAQCard 516 User Manual 4 8 National Instruments Corporation Chapter 4 Theory of Operation Counter Figure 4 6 Counter Block Diagram Each counter has a clock input pin a gate input
18. pin and an output pin labeled CLK GATE and OUT respectively The MSM82CS54 counters are numbered zero through two and their GATE CLK and OUT pins are labeled GATE N CLK N and OUT N where N is the counter number National Instruments Corporation 4 9 PC 516 DAQCard 516 User Manual Specifications This appendix lists the specifications of the PC 516 and DAQCard 516 These specifications are typical at 25 C unless otherwise specified Analog Input Input Characteristics Number of channels 8 single ended or 4 differential software selectable Type of ADC sise Successive approximation R solution issoria 16 bits worst case code range 32 243 to 32 242 due to software calibration Maximum sampling rate 50 kS s Input signal ranges 5 V Input Couphng s uns DC Overvoltage protection 25 V powered on 25 V powered off Inputs protected isssseninshenentes ACH lt 0 7 gt FIFO buffer size aiment 512 S Data transfers sine Interrupts programmed I O Transfer Characteristics ON ie niet 3 LSB max No missing codes 15 bits guaranteed Offset error After software calibration 1 LSB Before software calibration 20 LSB typ 45 LSB max National Instruments Corporation A 1 PC 516 DAQCard 516 User Manual Appendix Specifications Gain error relativ
19. system use either the application software LabVIEW or LabWindows CVI manuals or the NI DAQ documentation to help you write your application If you have a large and complicated system it is worthwhile to look through the software documentation before you configure your hardware Accessory manuals If you are using accessory products read the terminal block and cable assembly installation guides They explain how to physically connect the relevant pieces of the system Consult these guides when you are making your connections SCXI chassis manuals If you are using SCXI read these manuals for maintenance information on the chassis installation instructions and information about making custom modules xi PC 516 DAQCard 516 User Manual About This Manual Related Documentation The following documents contain information that you may find helpful as you read this manual Your NI DAQ software documentation e Your computer operating manual which explains how to insert cards into your system The following National Instruments manual contains detailed information for the register level programmer e DAQCard 500 516 and PC 516 Register Level Programmer Manual This manual is available from National Instruments by request If you are using NI DAQ LabVIEW or LabWindows CVI you should not need the register level programmer manual Using NI DAQ LabVIEW or LabWindows CVI is as easy and as flexible as using the low level prog
20. useful for the initial prototyping of an application or in situations in which the 516 device interconnections are frequently changed After you develop a final field wiring scheme however you may want to develop your own cable Refer to Appendix B Custom Cable Design for information and guidelines for the design of custom cables National Instruments Corporation 1 5 PC 516 DAQCard 516 User Manual Chapter 1 Introduction Unpacking PC 516 Your board is shipped in an antistatic package to prevent electrostatic damage to the board Electrostatic discharge can damage several components on the board To avoid such damage in handling the board take the following precautions e Ground yourself via a grounding strap or by holding a grounded object e Touch the antistatic package to a metal part of your computer chassis before removing the board from the package Remove the board from the package and inspect the board for loose components or any other sign of damage Notify National Instruments if the board appears damaged in any way Do not install a damaged board into your computer e Never touch the exposed pins of connectors DAQCard 516 Your PC card is shipped in an antistatic vinyl case when you are not using the card you should store it in this case Because the card is enclosed in a fully shielded case no additional electrostatic precautions are necessary However for your own safety and to protect the card
21. 16 device Signals are routed to the positive and PC 516 DAQCard 516 User Manual 3 6 National Instruments Corporation Chapter 3 Signal Connections negative inputs of the instrumentation amplifier through input multiplexers The instrumentation amplifier converts two input signals to a signal that is the difference between the two input signals multiplied by the gain setting of the amplifier The amplifier output voltage is referenced to the 516 device ground The 516 device ADC measures this output voltage when it performs A D conversions SE Input In single ended mode the signals connected to ACH lt 7 0 gt are routed to the positive terminal of the instrumentation amplifier and the negative terminal of the instrumentation amplifier is connected to the analog ground reference of the 516 device Thus the voltage measured by the 516 device in single ended mode is the difference between an input signal and the 516 device analog ground reference DIFF Input In differential mode signals connected to ACH lt 3 0 gt are routed to the positive input of the instrumentation amplifier and signals connected to ACH lt 7 4 gt are routed to the negative input of the instrumentation amplifier Thus the voltage measured by the 516 device in differential mode is the difference between two of the input signals Single Ended Connection Considerations Single ended connections are those in which all 516 device analog input signals are referen
22. 3 and the negative input tied to channels 4 5 6 or 7 respectively thus choosing channel pairs 0 4 1 5 2 6 3 7 While reading the following paragraphs you may find it helpful to refer to the Analog Input Signal Connections section of Chapter 3 Signal Connections which contains diagrams showing the signal paths for the two configurations These two modes are software selectable RSE Input Eight Channels Default Setting RSE input means that all input signals are referenced to a common ground point that is also tied to the device analog input ground The RSE configuration is useful for measuring floating signal sources See the Types of Signal Souces and Measurement Systems section of Chapter 3 Signal Connections for more information With this input configuration the device can monitor eight different analog input channels Considerations for using the RSE configuration are discussed in Chapter 3 Signal Connections Notice that in this mode the return path of the signal is analog ground at the connector through the AIGND pin DIFF Input Four Channels DIFF input means that each input signal has its own reference and the difference between each signal and its reference is measured The signal and its reference are each assigned an input channel With this input configuration the device can monitor four differential analog input signals PC 516 DAQCard 516 User Manual 2 6 National Instruments Corporation
23. 6 are warranted against defects in materials and workmanship for a period of one year from the date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace equipment that proves to be defective during the warranty period This warranty includes parts and labor The media on which you receive National Instruments software are warranted not to fail to execute programming instructions due to defects in materials and workmanship for a period of 90 days from date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace software media that do not execute programming instructions if National Instruments receives notice of such defects during the warranty period National Instruments does not warrant that the operation of the software shall be uninterrupted or error free A Return Material Authorization RMA number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty National Instruments believes that the information in this manual is accurate The document has been carefully reviewed for technical accuracy In the event that technical or typographical errors exist National Instruments reserves the right to make changes to subsequent ed
24. 6 only eee eceeesseeeesseeeeseeerseseeessseess 2 4 Plug and Play Mode anni at ante 2 4 Switchless M de scriosann eiin 2 5 Base I O Address Selection ss 2 5 Data Acquisition Related Configuration 2 5 Analog Input Configuration 0 00 cece ceeenecceseeeeeeseesecsreseensaeseseeees 2 5 RSE Input Eight Channels Default Setting 0 00000 2 6 DIFF Input Four Channels 2 0 0 0 ee eeeeeessseevesseesesrenees 2 6 Digital I O Configuration ss 2 7 Counter COMM SULTAN ON nn nee deen secasevsoureseten 2 7 National Instruments Corporation v PC 516 DAQCard 516 User Manual Table of Contents Chapter 3 Signal Connections HO CONN CEOLS en a SN ere Re Reis en 3 1 Signal Connection Descriptions 2 nantaise nidiosistitninse 3 3 Analog Input Signal Connections ss 3 4 Analog Input Signal Connection Considerations 0 0 cee 3 4 Types of Signal Sources and Measurement Systems 0000 3 5 Ground Referenced Signal Sources 3 5 Floating Signal Sources 0 eceesseseecesseeseseeessseeeseesenees 3 5 Input Configurations ne en nes den be often 3 5 SE INpUt RE se aar rai erasana aaao 3 7 DIFF Sanyo nn A a tt seeded sea ee beeen cendeceenads 3 7 Single Ended Connection Considerations 3 7 Differential Connection Considerations 3 9 Differ
25. A D conversion is complete the ADC clocks the result into the A D FIFO The A D FIFO is 16 bits wide and 512 words deep This FIFO serves as a buffer to the ADC and has two benefits First when an A D conversion is complete the value is saved in the A D FIFO for later reading and the ADC is free to start a new conversion Secondly the PC 516 DAQCard 516 User Manual 4 4 National Instruments Corporation Chapter 4 Theory of Operation A D FIFO can collect up to 512 A D conversion values before any information is lost thus giving the software some extra time 512 times the sample interval to catch up with the hardware If more than 512 values are stored in the A D FIFO without the A D FIFO being read from an error condition called A D FIFO overflow occurs and A D conversion information is lost The A D FIFO generates a signal that indicates when it contains A D conversion data The state of this signal can be read from the Status Register The output from the ADC is a two s complement number ranging from 32 768 to 32 767 Data Acquisition Timing Circuitry A data acquisition operation refers to the process of obtaining a Series of successive A D conversions at a carefully timed interval This interval is called the sample interval The data acquisition timing circuitry consists of various clocks and timing signals that perform this timing The 516 device can perform two types of data acquisition single channel data acquisition a
26. Figure 1 1 The Relationship between the Programming Environment NI DAQ and Your Hardware ccccccssssssseeeccccceasesscceceeeaeceesceeeeees 1 4 Figure 2 1 A Typical Configuration for the DAQCard 516 aseeseen 2 3 Figure 3 1 W O Connector Pin Assignment 0 cccesescccseesseeceeesstseeeseseseeeeeeeeees 3 2 Figure 3 2 Onboard Instrumentation Amplifier cc cccccceeeessesceeeeeeeeeeteneeeeeees 3 6 Figure 3 3 Single Ended Analog Input Signal Connections 0 0 0 0 cee eeeeeeeeeeeeee 3 8 Figure 3 4 Differential Input Connections for Grounded Signal Sources 3 10 Figure 3 5 Differential Input Connections for Floating Sources 0 3 11 Figure 3 6 Digital I O Signal Connections 0000 eee eeeseeeeeeneeeeeeeeeessueeeesseeseneees 3 14 Figure 3 7 EXTCONV Signal Timing sisi cosesvincaconstscasiatsventsvotencuossannvangiers 3 15 Figure 3 8 Event Counting Application with External Switch Gating 3 16 Figure 3 9 Frequency Measurement Application ceseceecessseceeeeeeeeeeeeeenneees 3 17 Figure 3 10 General Purpose Timing Signals 3 19 Figure 4 1 516 Device Block Diagramme in teste isa 4 2 Figure 4 2 Bus Interface Circuitry Block Diagram 4 3 Figure 4 3 Analog Input and Data Acquisition Circuitry Block Diagram 4 4 Figure 4 4 Digital I O Circuitry Block Diagram cece
27. Operation To perform pulse and square wave generation program a counter to generate a timing signal at its OUT output pin To count events program a counter to count rising or falling edges applied to any of the MSM82C54 CLK inputs You can then read the counter value to determine the number of edges that have occurred You can gate counter operation on and off during event counting Figure 3 8 shows connections for a typical event counting operation in which a switch is used to gate counter 2 on and off 27 DGND a a 1 0 Connector PC 516 or DAQCard 516 Notice that the switch debounce circuit which is required for proper operation is not shown in the figure for simplicity Figure 3 8 Event Counting Application with External Switch Gating Use level gating to measure pulse width Apply the pulse to be measured to the GATE2 input Load the counter with the known count and program the counter to count down while the signal at the GATE2 PC 516 DAQCard 516 User Manual 3 16 National Instruments Corporation Chapter 3 Signal Connections input is high The pulse width equals the counter difference loaded value minus read value multiplied by the CLK2 period To measure time lapse program counter 2 to be edge gated Apply an edge to the GATE2 input to start the counter Program counter 2 to start counting after receiving a low to high edge The time lapse since receiving the edge equals the counter value difference
28. accessory 1 5 custom cable design connector pin assignments B 2 DAQCard 516 B 1 PC 516 B 1 to B 2 CLK GATE and OUT signal timing connections counter block diagram 4 9 event counting application figure 3 16 frequency measurement application figure 3 17 PC 516 DAQCard 516 User Manual Index timing requirements figure 3 19 timing specifications 3 18 CLK1 signal table 3 3 CLK2 signal table 3 3 common mode signal rejection considerations 3 12 to 3 13 configuration See also installation analog input 2 5 to 2 7 DIFF input 2 6 to 2 7 RSE input 2 6 counter 2 7 data acquisition related 2 5 to 2 7 digital I O 2 7 PC 516 configuration 2 4 to 2 5 base I O selection 2 4 to 2 5 bus related 2 4 plug and play mode 2 4 to 2 5 switchless mode 2 5 PC card questions and answers C 1 typical configuration for DAQCard 516 figure 2 3 counter block diagram 4 9 counter configuration 2 7 custom cable design See cables customer communication xii E 1 to E 2 D DAQCard 516 See PC 516 DAQCard 516 data acquisition counter and timing connections 3 15 data acquisition timing circuitry block diagram 4 5 data acquisition rates 4 6 multichannel scanned data acquisition 4 6 single channel data acquisition 4 6 theory of operation 4 5 to 4 6 DGND signal table 3 3 PC 516 DAQCard 516 User Manual DIFF input analog input configuration 2 6 to 2 7 definition table 2 6 recommended input configur
29. as a general analog power ground tie to your 516 device Pins 2 through 9 are the ACH lt 0 7 gt signal pins These pins are tied to the analog input channels of your 516 device through 4 7 kQ series resistors These resistors limit the input current to the multiplexer The following input range and maximum ratings apply to inputs ACH lt 0 7 gt e Input signal range 5 V e Maximum input voltage rating 25 V powered on or off Ya Warning Exceeding the input signal range distorts input signals Exceeding the maximum input voltage rating may damage your 516 device and computer National Instruments IS NOT liable for any damages resulting from any such signal connections Analog input Signal Connection Considerations When making analog signal connections to your 516 device you should first determine whether the signal source and the measurement system are floating or ground referenced The two types of signal sources are described as follows and the types of measurement systems are described in later sections PC 516 DAQCard 516 User Manual 3 4 National Instruments Corporation Chapter 3 Signal Connections Types of Signal Sources and Measurement Systems Ground Referenced Signal Sources A ground referenced signal source or measurement system is one that is connected in some way to the building system ground Nonisolated outputs of instruments and devices that plug into the building power system fall into this category The diffe
30. assignment figure only if you are designing custom made cables for your device PC 516 DAQCard 516 User Manual B 2 National Instruments Corporation PC Card Questions and Answers Appendix This appendix contains a list of common questions and answers relating to PC Card PCMCIA operation The questions are grouped according to the type of information requested You may find this information useful if you are having difficulty with the PCMCIA system software configuration and you are using Windows 3 1 If you are using Windows 95 the operation system will automatically configure your PC Card All questions in this appendix are specific to Windows 3 1 with the exception of question 3 in the Operations section Configuration Do I need to use my PCMCIA configuration utility to configure the National Instruments PC Cards No We recommend that you do not configure our PC Cards using PC Card Control or an equivalent PC Card configuration utility Use the configuration utilities included with the NI DAQ driver software to properly configure your card The appropriate utility is the NI DAQ Configuration Utility formerly called WOAQCONF for Windows 3 1 users 2 What should I do if my computer does not have Card and Socket Services version 2 0 or later Contact the manufacturer of your computer or of your PCMCIA adapter and request the latest Card and Socket PCMCIA driver Our NI DAQ software will work with any Card an
31. ations table 3 6 differential connection considerations 3 9 to 3 13 common mode signal rejection considerations 3 12 to 3 13 floating signal sources 3 11 to 3 12 grounded signal sources 3 10 DIFF input 3 7 digital O circuitry 4 7 block diagram 4 7 data acquisition configuration 2 7 signal connections 3 13 to 3 14 I O connections figure 3 14 pins 3 13 specifications 3 13 specifications A 3 DIN lt 0 3 gt signal description table 3 3 digital I O circuitry 4 7 documentation conventions used in manual x National Instruments documentation xi organization of manual ix x related documentation xii DOUT lt 0 3 gt signal description table 3 3 digital I O circuitry 4 7 E e mail support E 2 electronic technical support E 1 to E 2 environment specifications A 4 equipment optional 1 5 event counting 3 16 application with external switch gating figure 3 16 National Instruments Corporation EXTCONV signal data acquisition counter and timing connections 3 15 description table 3 3 signal timing figure 3 15 F fax and telephone support E 2 faxback support E 2 floating signal sources analog input signal connections 3 5 to 3 7 differential input connections 3 11 to 3 12 recommended input configurations table 3 6 frequency measurement 3 17 application figure 3 17 FTP support E 1 G GATE signal timing connections See CLK GATE and OUT signal timing connections
32. ced to one common ground The input signals are tied to the positive input of the instrumentation amplifier that is referenced to their common ground point When your 516 device is configured for single ended input eight analog input channels are available You can use single ended input connections when the following criteria are met by all input signals e Input signals are high level greater than 1 V e Leads connecting the signals to the 516 device are less than 15 ft e All input signals share a common reference signal at the source If any one of the preceding criteria is not met use the DIFF input configuration The 516 device single ended configuration is referenced You can use this mode for nonreferenced signal sources In addition if the computer National Instruments Corporation 3 7 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections using the 516 device is not ground referenced you can use this mode for ground referenced signal sources Figure 3 3 shows how to connect a signal source to your 516 device in single ended mode When you connect grounded signal sources to a 516 device in a ground referenced computer carefully observe the polarity to avoid shorting the signal source output A laptop operating from a battery is not grounded A laptop powered from an AC DC adapter may or may not be grounded Instrumentation Signal Amplifier Source Measured Vy Voltage 1 0 Connector 7 PC 516
33. croprocessor Clock frequency or speed 2 a ma Type of video board installed Operating system version Operating system mode Programming language 2 2 re a a aa Programming language version _ o e a a aa a aa aa Other boards in system A a a a a Base I O address of other boards DMA channels of other boards Interrupt level of other boards _ s s e s a aa a aaa a aaa a a PC card software Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products This information helps us provide quality products to meet your needs Title PC 516 DAQCard 516 User Manual Edition Date May 1996 Part Number 321178A 01 Please comment on the completeness clarity and organization of the manual If you find errors in the manual please record the page numbers and describe the errors Thank you for your help Name Title Company Address Phone Mail t0 Technical Publications Fax to Technical Publications National Instruments Corporation National Instruments Corporation 6504 Bridge Point Parkway 512 794 5678 Austin TX 78730 5039 Glossary Numbers Symbols Q 1 MHz AIGND AWG CE CLK CMOS CMRR CTR degrees ohms percent 1 MHz square wave oscillator signal amperes alternating current analog input channel signal analog to digital A D converter analog input ground signal American Wire Gauge Celsius card enable signal
34. d Socket Service driver that is compliant to version 2 0 or later National Instruments Corporation C 1 PC 516 DAQCard 516 User Manual Appendix C PC Card Questions and Answers Operation 1 My PC Card works when inserted before power on time but it does not work when hot inserted What is wrong You may have an interrupt conflict If you have a utility such as MSD EXE run it to determine the allocated interrupts then refer to question 5 in the Resources section MSD EXE is usually shipped with Microsoft Windows 2 My computer locks up when I use a PC Card What should I do This usually happens because Card Services allocated an unusable interrupt level to the PC Card For example on some computers interrupt level 11 is not routed to PC Cards If Card Services is not aware of this it may assign interrupt 11 to a PC Card even though the interrupt is not usable When a call uses the interrupt the interrupt never occurs and the computer locks up waiting for a response For information about how to locate an interrupt that is free to be used refer to question 4 in the Resources section 3 Is there a way I can conserve power on my PC Card when it is not in use Yes If you are using NI DAQ for PC compatibles version 4 8 0 or later a utility called DAQPOWER EXE will switch National Instruments PC Cards between normal mode and power down mode Run DAQPOWER from the command line to view instructions on the proper usage See
35. digital circuitry is powered on and is functional The analog input is powered down by setting the PWRDOWN bit in the PC Card Configuration and Status Register You can set the PWRDOWN bit by using the DAQPOWER utility that is shipped with NI DAQ Use DAQPOWER D to power down and DAQPOWER U to power up the DAQCard 516 This utility is available in Windows and is installed whenever you install NI DAQ Typically the analog supplies are not reduced to zero negligible power is supplied to the analog circuits This mode draws about 20 mA from the 5 V supply about 100 mW D 1 PC 516 DAQCard 516 User Manual Appendix D Power Management Modes Table D 1 shows the effects of different power management modes on the DAQCard 516 circuits Table D 1 Analog Input Normal Mode Functional Protected to 25 V Impedance gt 10 GQ Counters PC 516 DAQCard 516 User Manual Functional Protected from 0 5 to 5 5 V Functional Initialize to undefined states Individual counters of the 82C54 must be fully programmed before use Protected from 0 5 to 5 5 V DAQCard 516 Power Management Modes Power Down Mode Nonfunctional Draws negligible power Protected to 25 V Impedance 4 7 kQ which is the input protection resistance Functional Protected from 0 5 to 5 5 V Functional Initialize to undefined states Individual counters of the 82C54 must be fully programmed before use Protected from 0 5 to 5 5 V
36. e or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of National Instruments Corporation LabVIEW NI DAQ RTSI DAQCard and SCXI are trademarks of National Instruments Corporation Product and company names listed are trademarks or trade names of their respective companies WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS National Instruments products are not designed with components and testing intended to ensure a level of reliability suitable for use in treatment and diagnosis of humans Applications of National Instruments products involving medical or clinical treatment can create a potential for accidental injury caused by product failure or by errors on the part of the user or application designer Any use or application of National Instruments products for or involving medical or clinical treatment must be performed by properly trained and qualified medical personnel and all traditional medical safeguards equipment and procedures that are appropriate in the particular situation to prevent serious injury or death should always continue to be used whe
37. e to calibration reference After software calibration 40 045 of reading typ 0 09 max Before software calibration 0 87 of reading typ 1 5 max Amplifier Characteristics Input impedance 10 GQ in parallel with 20 pF CMRR all input ranges 0 70 dB DC to 60 Hz Dynamic Characteristics Settling time to 0 0015 1 LSB for full scale Step 20 us System OISE pese ens 1 LSBrms typ Stability Recommended warm up time 15 min Offset temperature coefficient 20 ppm C max Gain temperature coefficient 30 ppm C max PC 516 DAQCard 516 User Manual A 2 National Instruments Corporation Digital 1 0 Timing 1 0 Bus interface Number of channels Compatibility sde sis Appendix A Specifications Digital logic levels Input low voltage Input high voltage Input low current Vin 0 V Input high Vin 5 V current Output low voltage Tout 4 mA Output high voltage out 4 mA Number of channels Resolution Compatibility ns Base clocks available 008 Base clock accuracy Max source frequency Min source pulse duration Min gate pulse duration Data transfers nie nmen nine National Inst
38. ential Connections for Grounded Signal Sources 3 10 Differential Connections for Floating Signal Sources 3 11 Common Mode Signal Rejection Considerations 3 12 Digital I O Signal Connections ss 3 13 Timing ONNECHONS nn sn en a Esa TESEN Eae Si 3 14 Data Acquisition Counter and Timing Connections c ce00 3 15 General Purpose Counter and Timing Signal Connections 3 15 Chapter 4 Theory of Operation Funct Oral Overview isco eile Re aeaee a eee iine ar iaae EEAS SET iR 4 1 Bus Interface Circuitry nee ia ac es a aes aaa e re E h e ESER EE A ia aED 4 3 Analog Input and Data Acquisition Circuitry ss 4 3 Analog Inp t Circ nner y opsein erie seiiet nes ie diiens 4 4 Data Acquisition Timing Circuitry ss 4 5 Single Channel Data Acquisition eseesssreessreeeseeeeeesrsrnreesessrressses 4 6 Multichannel Scanned Data Acquisition 4 6 Data ACquisition Rates nt astsdiettncnaos sa snnces ureien vakoaan 4 6 Digital VO Circ ttiy eiee iiite a seaseasosscessbe adbicivec EASE EEA OE EAE Eoee aras 4 7 Timing DO CC ey nn ainsi id nr ann Ann E LA EEE EE bete 4 7 Appendix A Specifications Appendix B Custom Cable Design PC 516 DAQCard 516 User Manual vi National Instruments Corporation Table of Contents Appendix C PC Card Questions and Answers Appendix D Power Management Modes Appendix E Customer Communication Glossary Index Figures
39. er operations SCXI RTSI self calibration messaging and acquiring data to extended memory National Instruments Corporation 1 3 PC 516 DAQCard 516 User Manual Chapter 1 Introduction NI DAQ has both high level DAQ I O functions for maximum ease of use and low level DAQ I O functions for maximum flexibility and performance Examples of high level functions are streaming data to disk or acquiring a certain number of data points An example of a low level function is writing directly to registers on the DAQ device NI DAQ does not sacrifice the performance of National Instruments DAQ devices because it lets multiple devices operate at their peak performance NI DAQ also internally addresses many of the complex issues between the computer and the DAQ hardware such as programming interrupts and DMA controllers NI DAQ maintains a consistent software interface among its different versions so that you can change platforms with minimal modifications to your code Whether you are using conventional programming languages LabVIEW or LabWindows CVI your application uses the NI DAQ driver software as illustrated in Figure 1 1 Conventional Programming LabVIEW LabWindows CVI Environment PC Macintosh or PC or PC Macintosh or Sun SPARCstation Sun SPARCstation Sun SPARCstation NI DAQ Driver Software Personal DAQ or Computer SCXI Hardware or Workstation Figure 1 1 The Relationship between the Programming Envir
40. figuration section for your operating system and follow the instructions given there If you are using LabVIEW the software installation instructions are in your LabVIEW release notes After you have installed LabVIEW refer to the Configuring LabVIEW section of Chapter 1 of your LabVIEW user manual for software configuration instructions If you are using LabWindows CVI the software installation instructions are in your LabWindows CVI release notes After you have installed LabWindows CVI refer to Chapter 1 Configuring LabWindows CVI of the LabWindows CVI User Manual for software configuration instructions If you are a register level programmer refer to the DAQCard 500 516 and PC 516 Register Level Programmer Manual PC 516 The PC 516 is completely software configurable Two types of configuration are performed on the PC 516 bus related and data acquisition related Bus related configuration includes setting the base I O address Data acquisition related configuration includes such settings as analog input mode digital I O configuration and counter configuration Bus Related Configuration PC 516 only The PC 516 works in either a Plug and Play mode or a switchless mode These modes dictate how the base I O address is determined and assigned to the device Plug and Play Mode The PC 516 is fully compatible with the industry standard Intel Microsoft Plug and Play Specification version 1 0 A Plug and Play system arbi
41. for the 27 pin female connector on the DAQCard 516 Use the pin assignment in Figure B 1 only for custom cable design If you are using the National Instruments PR27 30F cable you should use the pin assignment shown in Figure 3 1a The other end of the cable uses a 30 pin insulation displacement male ribbon cable header connector National Instruments uses a polarized keyed connector to prevent inadvertent upside down connection to the CB 27 The recommended manufacturer part number for this mating connector is as follows e AMP Manufacturing part number 746288 7 The following are the standard ribbon cables 30 conductor 28 AWG stranded that work with the 30 pin connectors e Electronic Products Division 3M part number 3365 30 e T amp B Ansley Corporation part number 171 30 PC 516 The recommended cable for the PC 516 is the National Instruments R30 30 This cable is a standard 30 conductor ribbon cable with a polarized 30 pin insulation displacement male ribbon cable header connector on each end Figure 3 1b shows the pin assignment for the 30 pin connector on the PC 516 Recommended manufacturer part numbers for the standard ribbon cables that work with the 30 pin connectors are listed above B 1 PC 516 DAQCard 516 User Manual Appendix B Custom Cable Design EXTCONV 5 V ACH7 ACH3 ACH6 ACH2 ACH5 ACH1 ACH4 ACHO mano Figure B 1 DAQCard 516 1 0 Connector Pin Assignments J Note Use this pin
42. ic low voltage 0 8 V maximum Input load current 10 0 pA maximum MSM82C54 digital output specifications referenced to DGND Voy output logic high voltage 3 0 V minimum Vo output logic low voltage 0 40 V maximum Ip output source current at Voy 2 5 mA maximum Ip output sink current at VoL 2 5 mA maximum 3 18 National Instruments Corporation clock period 100 ns clock high level 30 ns clock low level 50 ns gate setup time 40 ns gate hold time 50 ns gate high level 50 ns gate low level 50 ns output delay from clock 100 ns output delay from gate 100 ns Chapter 3 Signal Connections minimum minimum minimum minimum minimum minimum minimum maximum maximum Figure 3 10 General Purpose Timing Signals The GATE and OUT signals in Figure 3 10 are referenced to the rising edge of the CLK signal National Instruments Corporation 3 19 PC 516 DAQCard 516 User Manual Chapter Theory of Operation This chapter includes an overview of the PC 516 and DAQCard 516 and explains the operation of each functional unit making up your 516 device Functional Overview The block diagram in Figure 4 1 shows a functional overview of the PC 516 and DAQCard 516 National Instruments Corporation 4 1 PC 516 DAQCard 516 User Manual Chapter 4 Theory of Operation Cc amp O O lt O O a 2 a Instrumentation Amplifier 512 Word _ sampling Interface A D Tim
43. include the configuration forms from their user manuals Include additional pages if necessary Name Company Address Fax ___ Phone __ Computer brand Model Processor Operating system include version number Clock speed MHz RAM __ MB Display adapter Mouse _yes __no Other adapters installed Hard disk capacity __MB Brand Instruments used National Instruments hardware product model Revision Configuration National Instruments software product Version Configuration The problem is List any error messages The following steps reproduce the problem PC 516 DAQCard 516 Hardware and Software Configuration Form Record the settings and revisions of your hardware and software on the line to the right of each item Complete a new copy of this form each time you revise your software or hardware configuration and use this form as a reference for your current configuration Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently National Instruments Products PC 516 or DAQCard 516 Serial Number and Revision DAQ hardware Interrupt level of hardware Base I O address of hardware NI DAQ LabVIEW or LabWindows CVI version Programming choice Other boards in system Base I O address of other boards DMA channels of other boards Interrupt level of other boards Other Products Computer make and model Mi
44. ing oo eee ee cert nl eee MSM82c54 CRE OUT lt 1 2 gt 1 0 Connector Interrupt Interface From A D FIFO Digital 1O DC DC Converter 0 75 A Resettable Fuse Figure 4 1 516 Device Block Diagram The following are the major components of the 516 device e Bus interface circuitry Analog input circuitry e Digital I O circuitry Timing I O circuitry You can execute data acquisition functions by using the analog input circuitry and some of the timing I O circuitry The internal data and control buses interconnect the components The theory of operation for PC 516 DAQCard 516 User Manual 4 2 National Instruments Corporation Chapter 4 Theory of Operation each of these components is explained in the remainder of this chapter The theory of operation for the data acquisition circuitry is included with the discussion of the analog input circuitry Bus Interface Circuitry The bus interface circuitry consists of an address bus a data bus interrupt lines and several control and support signals The components making up the bus interface circuitry are shown in Figure 4 2 Address Bus Control Lines Data Bus S Cc fse O Q lt O O Q 2 Address Decoder Timing Interface Card Information Structure Data Buffers PCMCIA Control Registers Interrupt Control Register Selects Timing Signals Internal Data Bus interrupt Requests Figure 4 2
45. instrument control data analysis and graphical data presentation LabVIEW features interactive graphics a state of the art user interface and a powerful graphical programming language The LabVIEW Data Acquisition VI Library a series of VIs for using LabVIEW with National Instruments DAQ hardware is included with LabVIEW The LabVIEW Data Acquisition VI Library is functionally equivalent to the NI DAQ software LabWindows CVI features interactive graphics a state of the art user interface and uses the ANSI standard C programming language The LabWindows CVI Data Acquisition Library a series of functions for using LabWindows CVI with National Instruments DAQ hardware is included with the NI DAQ software kit The LabWindows CVI Data Acquisition library is functionally equivalent to the NI DAQ software Using LabVIEW or LabWindows CVI software will greatly reduce the development time for your data acquisition and control application NI DAQ Driver Software The NI DAQ driver software is included at no charge with all National Instruments DAQ hardware NI DAQ is not packaged with SCXI or accessory products except for the SCXI 1200 NI DAQ has an extensive library of functions that you can call from your application programming environment These functions include routines for analog input A D conversion buffered data acquisition high speed A D conversion analog output D A conversion waveform generation digital I O counter tim
46. itions of this document without prior notice to holders of this edition The reader should consult National Instruments if errors are suspected In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it EXCEPT AS SPECIFIED HEREIN NATIONAL INSTRUMENTS MAKES NO WARRANTIES EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CUSTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA PROFITS USE OF PRODUCTS OR INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY THEREOF This limitation of the liability of National Instruments will apply regardless of the form of action whether in contract or tort including negligence Any action against National Instruments must be brought within one year after the cause of action accrues National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control The warranty provided herein does not cover damages defects malfunctions or service failures caused by owner s failure to follow the National Instruments installation operation or maintenance instructions owner s modification of the product owner s abuse misus
47. mple do not configure two devices for the same base address Base 1 0 Address Selection You can configure the PC 516 to use base addresses in the range of 100 to FFFO hex The PC 516 occupies 16 bytes of address space and must be located on a 16 byte boundary Therefore valid addresses include 100 110 120 FFEO FFFO hex This selection is software configured and does not require you to manually change any settings on the device Data Acquisition Related Configuration Analog Input Configuration At startup your device defaults to the following configuration e Single ended input mode referenced to analog ground e 5 V analog range Software can configure the device for differential input mode The device has two different input modes referenced single ended RSE input and differential DIFF input The single ended input National Instruments Corporation 2 5 PC 516 DAQCard 516 User Manual Chapter 2 Installation and Configuration configuration provides eight channels The DIFF input configuration provides four channels Table 2 1 describes these configurations Table 2 1 Analog Input Modes for the 516 Device Analog Input Description Modes RSE Referenced single ended mode provides eight single ended inputs referenced to analog ground default setting Differential mode provides four differential inputs with the positive input of the instrumentation amplifier tied to channels 0 1 2 or
48. n National Instruments products are being used National Instruments products are NOT intended to be a substitute for any form of established process procedure or equipment used to monitor or safeguard human health and safety in medical or clinical treatment Table of Contents About This Manual Organization of this Manual issue rlnatetrertenisle delete ele Este 1X Conventions Used in This Manual 000 eee eeceeecseeceesessssceceeeseeeesseaneeeeeeeesssesnaeeeeeeeeees X National Instruments Documentation ss xi Related Documentation sooonseeoeeseesoeresessssssreesessssoreretesssssssoreessssnssrererssssssrrereresssreeeees xii Customer Communication divs cciisadectvrerceneca tase seem tise sare Guene aie ees xii Chapter 1 introduction About Your PC 516 and DAQCard 516 ss 1 1 What You Ne d to Get Started fier enr RE E a E a 1 2 Software Programming Choices gt ssc ccrecscusssveyeceavecicesta zovcebae detec teendonsSikeadeseeeusnauddendsseee 1 3 LabVIEW and LabWindows CVI Application Software cseseeee 1 3 NI DAQ Driver SOFWAT 2e eee sense tese 1 3 Register Level Programming suisses uit rsniatt terse 1 5 Optional Equipment nesciens ene ne dd tite de 1 5 Cabling SR PR vate Payet Stade 1 5 APACRINE ns TN teens eat E rte 1 6 Chapter 2 Installation and Configuration Installation 55 oie she Rs LAS nn ds ea aa 2 1 Hardwar Config ration cca pss de sass ne CRM den ne NN ere 2 3 Bus Related Configuration PC 51
49. n amplifier If the input signal common mode range exceeds the maximum computed above with respect to the 516 device ground you need to limit the amount of floating that occurs between the signal ground and the 516 device ground Digital 1 0 Signal Connections Pins 12 through 19 of the I O connector are digital I O signal pins Pins 12 through 15 are digital input pins Pins 16 through 19 are digital output pins Pin 27 is the digital ground pin The following specifications and ratings apply to the digital I O lines e Absolute maximum voltage 5 5 V with respect to input rating DGND e Absolute minimum voltage 0 5 V with respect to input rating DGND e Digital input compatibility TTL compatible Input current high or low level 1 HA e Digital output compatibility TTL compatible e Output current source capability 4 mA at Voy 3 5 V e Output current sink capability 4 mA at VoL 0 5 V Figure 3 6 shows an example of connections to the digital input and output ports Digital input applications include receiving TTL signals and sensing external device states such as the switch in Figure 3 6 Digital output applications include sending TTL signals and driving external devices such as the LED shown in Figure 3 6 National Instruments Corporation 3 13 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections Digital Input Port Digital Output Port 1 0 Connector PC 516 or DAQCard 516 Notice that the
50. n your country contact the source from which you purchased your software to obtain support Australia Austria Belgium Canada Ontario Canada Quebec Denmark Finland France Germany Hong Kong Italy Japan Korea Mexico Netherlands Norway Singapore Spain Sweden Switzerland Taiwan UK Telephone 03 9 879 9422 0662 45 79 90 0 02 757 00 20 519 622 9310 514 694 8521 45 76 26 00 90 527 2321 1 48 14 24 24 089 741 31 30 2645 3186 02 413091 03 5472 2970 02 596 7456 95 800 010 0793 0348 433466 32 84 84 00 2265886 91 640 0085 08 730 49 70 056 200 51 51 02 377 1200 01635 523545 LabVIEW 1v support natinst com HiQ hiq support natinst com VISA visa support natinst com Fax 03 9 879 9179 0662 45 79 90 19 02 757 03 11 514 694 4399 45 76 26 02 90 502 2930 1 48 14 24 14 089 714 60 35 2686 8505 02 41309215 03 5472 2977 02 596 7455 5 520 3282 0348 430673 32 84 86 00 2265887 91 640 0533 08 730 43 70 056 200 51 55 02 737 4644 01635 523154 Technical Support Form Photocopy this form and update it each time you make changes to your software or hardware and use the completed copy of this form as a reference for your current configuration Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently If you are using any National Instruments hardware or software products related to this problem
51. nd multichannel scanned data acquisition Scanned data acquisition uses a counter to automatically switch between analog input channels during data acquisition Data acquisition timing consists of signals that initiate a data acquisition operation and generate scanning clocks One of the three counters of the onboard MSM82CS4 is reserved for this purpose An A D conversion can be initiated during data acquisition by a low to high transition on the counter 0 output OUTO of the MSM82C54 onboard counter timer chip on the 516 device or by a low to high transition on EXTCONV input The sample interval timer is a 16 bit down counter that uses the onboard 1 MHz clock to generate sample intervals from 2 us to 65 535 ps see Timing I O Circuitry later in this chapter Each time the sample interval timer reaches zero it generates a pulse and reloads with the programmed sample interval count This operation continues until you reprogram the counter Notice that only counter 0 is required for data acquisition operations The software must track the number of conversions that have occurred and turn off counter 0 after the required number has been obtained National Instruments Corporation 4 5 PC 516 DAQCard 516 User Manual Chapter 4 Theory of Operation Single Channel Data Acquisition During single channel data acquisition you set a control register to select the analog input channel before data acquisition starts This multiplexer setti
52. never attempt to touch the pins of the connectors PC 516 DAQCard 516 User Manual 1 6 National Instruments Corporation Installation and Configuration Chapter This chapter describes how to install and software configure your 516 device Installation i Note You should install your driver software before installing your hardware Refer to your NI DAQ Release Notes for software installation instructions PC 516 You can install the PC 516 in any available 8 bit or 16 bit expansion slot in your computer The following are general installation instructions but consult your PC user manual or technical reference manual for specific instructions and warnings National Instruments Corporation 1 2 3 Turn off your computer Remove the top cover or access port to the I O channel Remove the expansion slot cover on the back panel of the computer Record the PC 516 serial and revision numbers on the Hardware and Software Configuration form in Appendix E Customer Communication You will need these numbers when you install and configure your board Insert the PC 516 into an 8 bit or a 16 bit slot Screw the mounting bracket of the PC 516 to the back panel rail of the computer Check the installation Replace the cover Attach the I O cable The optional R30 30 cable available for the PC 516 plugs into the 30 pin I O connector on the other end of the card This cable connects the PC 516 to other Nati
53. ng remains constant during the entire data acquisition process therefore you read all A D conversion data from a single channel Multichannel Scanned Data Acquisition You can perform multichannel data acquisition by enabling scanning during data acquisition A scan counter controls multichannel scanning For scanning operations the 516 device decrements from the highest numbered channel which you select through channel 0 and then repeats the sequence The 516 device can scan any number of channels from 2 to 8 Data Acquisition Rates The maximum data acquisition rate number of samples per second is determined by the conversion period of the ADC plus the acquisition time of its track and hold stage During multichannel scanning the data acquisition rate is further limited by the settling time of the input multiplexer and operational amplifier After the input multiplexer is switched the amplifier must be able to settle to the new input signal value to within 16 bit accuracy before an A D conversion is performed or 16 bit accuracy cannot not be achieved If your chosen data acquisition rate does not allow the specified settling time the analog input circuitry may not perform at 16 bit accuracy Furthermore if the maximum data acquisition rate is exceeded A D conversions may be lost The maximum data acquisition rate and settling time specifications are listed in Appendix A Specifications These settling time specifications as
54. nstruments products Be very careful not to put strain on the I O cable when inserting it into and removing it from the DAQCard 516 When plugging and unplugging the cable always grasp the cable by the connector Never pull directly on the I O cable to unplug it from the DAQCard 516 The DAQCard 516 is installed You are ready to make the appropriate connections to the I O connector cable as described in Chapter 3 Signal Connections and to install and configure your software Figure 2 1 shows an example of a typical configuration PC 516 DAQCard 516 User Manual 2 2 National Instruments Corporation Chapter 2 Installation and Configuration Portable Computer Se es ae 2 PL PCMCIA Slot PR27 30F Figure 2 1 A Typical Configuration for the DAQCard 516 Hardware Configuration DAQCard 516 The DAQCard 516 is completely software configurable refer to your software documentation to install and configure the software If you are using NI DAQ for PC compatibles or NI DAQ for NEC PC 9800 Series computers refer to your NI DAQ release notes Find the installation and system configuration section for your operating system and follow the instructions given there If you are using NI DAQ for Macintosh refer to the NI DAQ software reference manual Find the installation and system National Instruments Corporation 2 3 PC 516 DAQCard 516 User Manual Chapter 2 Installation and Configuration con
55. nts Corporation 3 9 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections Differential Connections for Grounded Signal Sources Figure 3 4 shows how to connect a ground referenced signal source to your 516 device configured for DIFF input Ground Referenced Signal Instrumentation Source Amplifier QO V Measured Voltage Common Mode Noise Ground NZ Potential and so on Input Multiplexers 1 0 Connector PC 516 or DAQCard 516 in DIFF Configuration Figure 3 4 Differential Input Connections for Grounded Signal Sources With this type of connection the instrumentation amplifier rejects both the common mode noise in the signal and the ground potential difference between the signal source and the 516 device ground shown as Vom in Figure 3 4 PC 516 DAQCard 516 User Manual 3 10 National Instruments Corporation Chapter 3 Signal Connections Differential Connections for Floating Signal Sources Figure 3 5 shows how to connect a floating signal source to your 516 device configured for DIFF input Configuration instructions are included in the Input Configurations section earlier in this chapter Floating Signal Source Instrumentation Amplifier Measured m Voltage Bias Current Return Paths 1O Connector PC 516 or DAQCard 516 in DIFF Configuration Figure 3 5 Differential Input Connections for Floating Sources The 100 kQ resistors shown in Figure 3 5 create a return pa
56. ny power signals to ground and vice versa National Instruments is NOT liable for any damages resulting from such signal connections National Instruments Corporation 3 1 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections DIN AIGND DINO ACH4 EXTCONV AE ACH5 5 V ACH6 ACH7 ACH7 ACH3 EXTCONV ACH6 DIN ACH2 16 15 DIN3 ACH5 DOUT1 ACH1 DOUT3 ACH4 EE DGND ACHO OUT AIGND CLK2 AIGND DGND NC a CB 27 Connector Block b PR27 30F and R30 30 Cable Figure 3 1 1 0 Connector Pin Assignments PC 516 DAQCard 516 User Manual 3 2 National Instruments Corporation Chapter 3 Signal Connections Signal Connection Descriptions Pim Simi ame met erin o AIGND AIGND Analog Input Ground This signal is the common ground tie in point for all analog signals ACH lt 0 7 gt AIGND ae EXTCONV DGND 12 15 DIN lt 0 3 gt DGND 16 19 DOUT lt 0 3 gt DGND National Instruments Corporation 3 3 PC 516 DAQCard 516 User Manual Analog Input Channels 0 through 7 These signals are single ended analog input signals The differential pairs are 0 4 1 5 2 6 and 3 7 5 Volts This pin provides 5 VDC The 5 V supply is fused at 0 75 A which is the maximum current available External Convert Signal This input signal externally controls A D conversions Digital Input Data Lines These signals are TTL compatible digital inp
57. on cabling 1 5 hardware and software requirements 1 2 optional equipment 1 5 overview and features 1 1 to 1 2 software programming choices 1 3 to 1 5 LabVIEW and LabWindows CVI application software 1 3 NI DAQ driver software 1 3 to 1 4 register level programming 1 5 PC card questions and answers C 1 to C 4 configuration C 1 operation C 1 to C 2 resource conflicts C 4 resources C 2 to C 3 physical specifications A 4 pin assignments custom cabling B 2 I O connectors 3 2 plug and play mode PC 516 2 4 power management modes of DAQCard 516 effects of power management table D 2 normal mode D 1 power down mode D 1 power requirement specifications A 4 pulse and square wave generation 3 16 pulse width measurement 3 16 R referenced single ended input See RSE input register level programming 1 5 RSE input analog input configuration 2 6 definition table 2 6 recommended input configurations table 3 6 single ended connection considerations 3 7 to 3 8 SE input 3 7 PC 516 DAQCard 516 User Manual 1 4 S scanned multichannel data acquisition 4 6 signal connections analog input signal connections 3 4 to 3 13 differential connection considerations 3 9 to 3 13 common mode signal rejection considerations 3 12 to 3 13 floating signal sources 3 11 to 3 12 grounded signal sources 3 10 DIFF input 3 7 exceeding input signal range warning 3 5 floating signal sources 3 5 ground referenced
58. on 4 6 block diagram of PC 516 DAQCard 516 4 2 bus interface circuitry figure 4 3 digital I O circuitry 4 7 functional overview 4 1 to 4 3 timing I O circuitry 4 7 to 4 9 block diagram 4 8 counter block diagram 4 9 time lapse measurement 3 17 National Instruments Corporation 1 5 Index timing connections 3 14 to 3 19 data acquisition counter and timing connections 3 15 GATE CLK and OUT signal timing requirements 3 18 to 3 19 general purpose counter and timing signal connections 3 15 to 3 19 event counting 3 16 frequency measurement 3 17 pulse and square wave generation 3 16 pulse width measurement 3 16 time lapse measurement 3 17 pins for timing I O signals 3 14 timing I O circuitry 4 7 to 4 9 block diagram 4 8 counter block diagram 4 9 timing I O specifications A 3 PC 516 DAQCard 516 User Manual
59. onal Instruments products When plugging and unplugging the cable always grasp the cable by the connector Never pull directly on the I O cable to unplug it from the PC 516 2 1 PC 516 DAQCard 516 User Manual Chapter 2 Installation and Configuration The PC 516 device is installed You are ready to make the appropriate connections to the I O connector cable as described in Chapter 3 Signal Connections and to install and configure your software DAQCard 516 You can install your DAQCard 516 in any available Type II PCMCIA slot in your computer You must have Card and Socket Services 2 0 or later installed in your computer The PC card software configures the card for your computer and automatically determines the base address The following are general installation instructions but consult your PC user manual or technical reference manual for specific instructions and warnings 1 Turn off your computer If your computer supports hot insertion you may insert or remove the DAQCard 516 at any time whether the computer is powered on or off 2 Remove the PCMCIA slot cover on your computer Insert the 68 pin PCMCIA bus connector of the DAQCard 516 into the PCMCIA slot The card is keyed so that you can insert it only one way 4 Attach the I O cable The optional PR27 30F cable available for the DAQCard 516 plugs into the 27 pin I O connector on the other end of the card This cable connects the DAQCard 516 to other National I
60. onment NI DAQ and Your Hardware PC 516 DAQCard 516 User Manual 1 4 National Instruments Corporation Chapter 1 Introduction Register Level Programming The final option for programming any National Instruments DAQ hardware is to write register level software Writing register level programming software can be very time consuming and inefficient and is not recommended for most users Even if you are an experienced register level programmer consider using NI DAQ LabVIEW or LabWindows CVI to program your National Instruments DAQ hardware Using the NI DAQ LabVIEW or LabWindows CVI software is as easy and as flexible as register level programming and can save weeks of development time Optional Equipment Cabling Listed below are some of the optional accessories that work with your 516 device New accessories are always being added to our product family See your National Instruments catalog or call the National Instruments office nearest you for more information about optional equipment e CB 27 I O connector block e R30 30 I O connector with 0 5 or 1 m connector cable PC 516 PR27 30F I O connector with 0 5 or 1 m connector cable DAQCard 516 National Instruments currently offers a cable termination accessory the CB 27 for use with your PC 516 or DAQCard 516 You can attach signal input and output wires to screw terminals on the connector block and therefore to your 516 device I O connector The CB 27 is
61. or DAQCard 516 Figure 3 3 Single Ended Analog Input Signal Connections PC 516 DAQCard 516 User Manual 3 8 National Instruments Corporation Chapter 3 Signal Connections Differential Connection Considerations Differential connections are those in which each 516 device analog input signal has its own reference signal or signal return path These connections are available when the 516 device is configured in the DIFF mode Each input signal is tied to the positive input of the instrumentation amplifier and its reference signal or return is tied to the negative input of the instrumentation amplifier When your 516 device is configured for DIFF input each signal uses two of the multiplexer inputs one for the signal and one for its reference signal Therefore only four analog input channels are available when you use the DIFF configuration Use the DIFF input configuration when any of the following conditions is present e Input signals are low level less than 1 V e Leads connecting the signals to the 516 device are greater than 15 ft e Any of the input signals requires a separate ground reference point or return signal e The signal leads travel through noisy environments Differential signal connections reduce picked up noise and increase common mode signal and noise rejection With these connections input signals can float within the common mode limits of the input instrumentation amplifier National Instrume
62. our acquisition Both 516 devices ship with NI DAQ National Instruments complete DAQ driver that handles every function listed on the data sheet for our DAQ hardware Using NI DAQ you can quickly and easily start your application without having to program the card on the register level In addition the low cost of a system based on the PC 516 or DAQCard 516 makes it ideal for laboratory work in industrial and academic environments The multichannel analog input is useful in signal analysis and data logging The 16 bit ADC is useful in high resolution applications such as chromatography temperature measurement and DC voltage measurement You can use the eight TTL compatible digital I O lines for switching external devices such as transistors and solid state relays and for reading the status of external digital logic You can use the counter timers to synchronize events generate pulses and measure frequency and time The PC 516 and DAQCard 516 used in conjunction with your computer are versatile cost effective platforms for laboratory test measurement and control National Instruments Corporation 1 1 PC 516 DAQCard 516 User Manual Chapter 1 Introduction DAQCard 516 The DAQCard 516 is a low cost low power analog input digital I O and timing I O card for computers equipped with a Type II PCMCIA slot The small size and weight of the DAQCard 516 coupled with its low power consumption make this card ideal for use in po
63. pect to your 516 device In these cases the instrumentation amplifier can reject any voltage due to ground potential differences between the signal source and the 516 device In addition with differential input connections the instrumentation amplifier can reject common mode noise pickup in the leads connecting the signal sources to the 516 device The common mode input range of the 516 device instrumentation amplifier is defined as the magnitude of the greatest common mode signal that can be rejected The 516 device can reject common mode input signals so long as V and V are both in the range 4 9 V The common mode input range for the 516 device depends on the size of the differential input signal Vaifr V in V in The formula for the permissible common mode input range is as follows V 4 9 V Vif 2 cm max Thus for a differential voltage as large as 8 V the largest common mode voltage that can be rejected is 0 9 V However if the differential signal is 2 5 V 3 65 V common mode voltage can be rejected The common mode voltage is measured with respect to the 516 device ground and can be calculated by the following formula Vv Vta Win 2 cm actual PC 516 DAQCard 516 User Manual 3 12 National Instruments Corporation Chapter 3 Signal Connections where V is the signal at the positive input of the instrumentation amplifier and V is the signal at the negative input of the instrumentatio
64. r computer documentation whether any of the power connections are tied to the building power system ground Input Configurations To measure the different types of input signals you can configure your 516 device for one of two input modes DIFF or RSE by changing the configuration of the onboard instrumentation amplifier Table 3 1 summarizes the recommended input configurations for both types of National Instruments Corporation 3 5 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections signal sources Figure 3 2 shows a diagram of the instrumentation amplifier Table 3 1 Recommended Input Configurations for Ground Referenced and Floating Measurement Systems System Type Type of Signal Recommended Input Configurations Ground referenced Ground referenced system such as a nonisolated outputs plug in instruments desktop computer Floating DIFF with bias resistors batteries thermocouples isolated outputs RSE Floating system such as Ground referenced DIFF with bias resistors a battery powered nonisolated outputs plug in instruments RSE computer Floating DIFF with bias resistors batteries thermocouples isolated outputs RSE Instrumentation Amplifier Vin Measured Voltage Vin Vins gt Vin Gain Figure 3 2 Onboard Instrumentation Amplifier The instrumentation amplifier applies common mode voltage rejection and presents a high input impedance to the analog input signals connected to the 5
65. ramming described in the register level programmer manual Refer to Software Programming Choices in Chapter 1 Introduction of this manual to learn more about your programming options Customer Communication National Instruments wants to receive your comments on our products and manuals We are interested in the applications you develop with our products and we want to help if you have problems with them To make it easy for you to contact us this manual contains comment and configuration forms for you to complete These forms are in Appendix E Customer Communication at the end of this manual PC 516 DAQCard 516 User Manual xii National Instruments Corporation Introduction This chapter describes the PC 516 and DAQCard 516 lists the optional software and optional equipment and explains how to unpack your 516 device About Your PC 516 and DAQCard 516 Thank you for purchasing the National Instruments PC 516 or DAQCard 516 Each 516 device contains a 16 bit successive approximation ADC with eight single ended or four differential analog inputs four lines of TTL compatible digital input and four lines of digital output Each 516 device also contains two 16 bit counter timer channels for timing I O The optional 27 pin I O connector enables you to easily connect all your signals directly to the 516 device Each 516 device is fully software configurable and calibrated so that you can easily install the 516 device and begin y
66. rence in ground potential between two instruments connected to the same building power system is typically between 1 and 100 mV but can be much higher if power distribution circuits are not properly connected The connection instructions described later in this chapter for grounded signal sources are designed to eliminate this ground potential difference from the measured signal Floating Signal Sources A floating signal source or measurement system is one that is not connected in any way to the building ground system but rather has an isolated ground reference point Some examples of floating signal sources are outputs of transformers thermocouples battery powered devices optical isolator outputs and isolation amplifiers A floating measurement system will float to the level of the signals being measured The ground reference of a floating signal must be tied to the analog input ground to establish a local or onboard reference for the signal Otherwise the measured input signal varies or appears to float An instrument that provides an isolated output falls into the floating signal source category Depending on the power connection a portable computer can represent either a floating or ground referenced measurement system If a portable computer is entirely battery powered it is a floating system If it is operated from an AC DC wall adapter it may or may not be ground referenced depending on the connection You should determine from you
67. rtable computers making remote data acquisition practical The card requires very little power when operating and has a standby mode that uses even less power thus extending the life of your computer batteries Detailed specifications for the PC 516 and DAQCard 516 are in Appendix A Specifications What You Need to Get Started To set up and use your 516 device you will need the following Q One of the following 516 devices PC 516 DAQCard 516 Q One of the following I O connectors with 0 5 or 1 m connector cable PR27 30F DAQCard 5 16 R30 30 PC 516 Q PC 516 DAQCard 516 User Manual LJ One of the following software packages and documentation NI DAQ for PC compatibles NI DAQ for NEC PC 9800 Series NI DAQ for Macintosh LabVIEW for Windows LabVIEW for Macintosh LabWindows CVI for Windows Q Your computer PC 516 DAQCard 516 User Manual 1 2 National Instruments Corporation Chapter 1 Introduction Software Programming Choices There are several options to choose from when programming your National Instruments DAQ and SCXI hardware You can use LabVIEW LabWindows CVI or NI DAQ LabVIEW and LabWindows CVI Application Software LabVIEW and LabWindows CVI are innovative program development software packages for data acquisition and control applications LabVIEW uses graphical programming whereas LabWindows CVI enhances traditional programming languages Both packages include extensive libraries for data acquisition
68. ruments Corporation A 3 3 counter timers 1 dedicated to analog input 16 bits TTL gate and source pulled high with 100 kQ resistors 0 01 PC 516 DAQCard 516 User Manual Appendix A Specifications Power Requirement PC 516 5 VDC CES D se 80 mA max 12 ND CES Minis 20 mA max DAQCard 516 9 VDC CED sn eais 60 mA in operational mode 20 mA in power down mode 7 Note These power usage figures do not include the power used by external devices that you have connected to the fused supply present on the 1 0 connector Physical PC 516 Dimensions 12 by 10 7 cm 4 25 by 4 3 in VO CORRECLO NS ne 27 pin male DAQCard 516 PC Card De auras Type II I O CONNECUOF ss sine 27 pin male Environment Operating temperature 0 to 70 C Storage temperature 55 to 150 C Relative humidity 5 to 90 noncondensing PC 516 DAQCard 516 User Manual A 4 National Instruments Corporation Custom Cable Design This appendix describes the pin connections on the PC 516 and DAQCard 516 which you will need only if you are designing your own cable DAQCard 516 National Instruments Corporation The recommended cable for the DAQCard 516 is the National Instruments PR27 30F This cable has a 27 pin male connector that mates with the 27 pin female connector on the device Figure B 1 shows the pin assignment
69. signal sources 3 5 input configurations 3 5 to 3 7 signal connection considerations 3 4 single ended connection considerations 3 7 to 3 8 SE input 3 7 types of signal sources and measurement systems 3 5 digital I O signal connections 3 13 to 3 14 I O connector pin assignments figure 3 2 signal connection descriptions table 3 3 to 3 4 timing connections 3 14 to 3 19 data acquisition counter and timing connections 3 15 general purpose counter and timing signal connections 3 15 to 3 19 single channel data acquisition 4 6 single ended connection considerations 3 7 to 3 8 signal source connection figure 3 8 SE input 3 7 National Instruments Corporation software programming choices LabVIEW and LabWindows CVI application software 1 3 NI DAQ driver software 1 3 to 1 4 register level programming 1 5 specifications analog input amplifier characteristics A 2 dynamic characteristics A 2 input characteristics A 1 stability A 2 transfer characteristics A 1 to A 2 bus interface A 3 digital I O A 3 environment A 4 physical A 4 power requirements A 4 timing I O A 3 switchless mode 2 4 T technical support E 1 to E 2 theory of operation analog input and data acquisition circuitry 4 3 to 4 6 analog input circuitry 4 4 to 4 5 block diagram 4 4 data acquisition rates 4 6 data acquisition timing circuitry 4 5 to 4 6 multichannel scanned data acquisition 4 6 single channel data acquisiti
70. sume that voltage levels on all the channels included in the scan sequence are within range and are driven by low impedance sources Signal levels outside the ranges on the channels included in the scan sequence adversely affect the input settling time Similarly greater settling time may be required for channels driven by high impedance signal sources PC 516 DAQCard 516 User Manual 4 6 National Instruments Corporation Chapter 4 Theory of Operation Digital 1 0 Circuitry Each 516 device has eight digital I O lines that are TTL compatible Pins DIN lt 0 3 gt of the I O connector are digital input lines and pins DOUT lt 0 3 gt are digital output lines These lines are monitored or driven by the Digital Input Register or the Digital Output Register respectively Reading the Digital Input Register returns the current state of DIN lt 0 3 gt lines Writing to the Digital Output Register drives the new value onto the DOUT lt 0 3 gt lines Figure 4 4 shows a diagram of this circuitry Digital DIN lt 0 3 gt Input Register 1 0 Connector de DOUT lt 0 3 gt Digital Output Register O Q lt O 2 O ie 2 a Figure 4 4 Digital 1 0 Circuitry Block Diagram Timing 1 0 Circuitry Each 516 device uses an MSM82CS54 counter timer integrated circuit for data acquisition timing and for general purpose timing I O functions Counters 1 and 2 of the MSM82CS54 are available for general use but counter 0
71. switch debounce circuit which is required for proper operation is not shown in the figure for simplicity Figure 3 6 Digital 1 0 Signal Connections i Note Pin numbers in this figure refer only to the PR27 30F cable Timing Connections Pins 20 through 26 and pin 11 of the I O connector are for timing I O signals The 516 device uses an MSM82C54 counter timer integrated circuit Counters 1 and 2 are available at the I O connector Counter 0 is dedicated for data acquisition timing Pin 11 carries an external signal EXTCONV that can be used for data acquisition timing in place of counter 0 of the MSM82C54 This signal is explained in the Data Acquisition Counter and Timing Connections section of this chapter Pin 20 carries the 1 MHz square wave oscillator signal This signal can be used as a timebase for the counter clock inputs Pins 22 through 26 carry general purpose timing signals from the MSM82C54 These signals are explained under General Purpose Counter and Timing Signal Connections later in this chapter PC 516 DAQCard 516 User Manual 3 14 National Instruments Corporation Chapter 3 Signal Connections Data Acquisition Counter and Timing Connections Counter 0 on the MSM82C54 counter timer is used as a sample interval counter in timed A D conversions In addition to counter 0 you can use pin 11 EXTCONV to externally time conversions If you need to program this chip directly refer to the optional DAQCard 500 516 and
72. th to ground for the bias currents of the instrumentation amplifier If a return path is not provided the instrumentation amplifier bias currents charge up stray capacitances resulting in uncontrollable drift and possible saturation in the amplifier Typically values from 10 to 100 kQ are used A resistor from each input to ground as shown in Figure 3 5 provides bias current return paths for an AC coupled input signal This solution although necessary for AC coupled signals lowers the input impedance National Instruments Corporation 3 11 PC 516 DAQCard 516 User Manual Chapter 3 Signal Connections of the analog input channel In addition the input offset current of the instrumentation amplifier contributes a DC offset voltage at the input The amplifier has a maximum input offset current of 0 75 nA and a typical offset current drift of 1 5 pA C Multiplied by the 100 kQ resistor this current contributes a maximum offset voltage of 75 uV and a typical offset voltage drift of 150 nV C at the input Thus the offset is unlikely to be more than an LSB so it can usually be ignored If the input signal is DC coupled only the resistor connecting the negative signal input to ground is needed This connection does not lower the input impedance of the analog input channel Common Mode Signal Rejection Considerations Figures 3 4 and 3 5 show connections for signal sources that are already referenced to some ground point with res
73. trates and assigns resources through software freeing you from manually setting switches and jumpers These resources include the device base I O address The PC 516 is configured at the factory to request these resources from the Plug and Play Configuration Manager The Configuration Manager receives all of the resource requests at start up compares the available resources to those requested and assigns the available resources as efficiently as possible to the Plug and Play devices Application software can query the Configuration Manager to determine the resources assigned to each device without your PC 516 DAQCard 516 User Manual 2 4 National Instruments Corporation Chapter 2 Installation and Configuration involvement The Plug and Play software is installed as a device driver or as an integral component of the computer BIOS If you have the Windows 95 operating system on your PC it will configure your PC 516 Refer to your NI DAQ documentation for more information Switchless Mode You can use the PC 516 in a non Plug and Play system as a switchless DAQ device A non Plug and Play system is a system in which the Configuration Manager has not been installed and which does not contain any non National Instruments Plug and Play products You use a configuration utility to enter the base address and the application software assigns it to the device 7 7 Note Avoid resource conflicts with non National Instruments devices For exa
74. ut lines DIN3 is the MSB DINO is the LSB Digital Output Data Lines These signals are TTL compatible digital output lines DOUT3 is the MSB DOUTO is the LSB 1 MHz Square Wave Output of Oscillator This signal is a 1 MHz square wave for use with the internal counter or for external timing needs Digital Ground This is the common ground tie in point for all digital signals Clock Input of Counter 1 This signal is the clock input of counter 1 Output of Counter 1 This signal outputs the programmed waveform of counter 1 Gate Input of Counter 2 This signal controls the starting interruption and restarting of counter 2 Clock Input of Counter 2 This signal is the clock input of counter 2 Chapter 3 Signal Connections 26 OUT2 DGND Output of Counter 2 This signal outputs the programmed waveform of counter 2 28 30 NC Not Connected These signals are not connected Not available on the CB 27 I Note An asterisk indicates that the signal is active low The connector pins are grouped into analog input signal pins digital I O signal pins and timing I O signal pins Signal connection guidelines for each of these groups are included in this chapter Analog Input Signal Connections Pins 1 through 9 are analog input signal pins for the ADC Pin 1 AIGND is an analog common signal You can use this pin
75. vices at United States 512 794 5422 or 800 327 3077 Up to 14 400 baud 8 data bits 1 stop bit no parity United Kingdom 01635 551422 Up to 9 600 baud 8 data bits 1 stop bit no parity France 1 48 65 15 59 Up to 9 600 baud 8 data bits 1 stop bit no parity FTP Support To access our FTP site log on to our Internet host ftp natinst com as anonymous and use your Internet address such as joesmith anywhere com as your password The support files and documents are located in the support directories National Instruments Corporation E 1 PC 516 DAQCard 516 User Manual FaxBack Support FaxBack is a 24 hour information retrieval system containing a library of documents on a wide range of technical information You can access FaxBack from a touch tone telephone at the following number 512 418 1111 E Mail Support currently U S only You can submit technical support questions to the appropriate applications engineering team through e mail at the Internet addresses listed below Remember to include your name address and phone number so we can contact you with solutions and suggestions GPIB gpib support natinst com DAQ daq support natinst com VXI vxi support natinst com LabWindows 1w support natinst com Fax and Telephone Support National Instruments has branch offices all over the world Use the list below to find the technical support number for your country If there is no National Instruments office i

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