PCI/PXI™-6704 User Manual
Contents
1. Figure 3 1 1 0 Connector Pin Assignments PCI PXI 6704 User Manual 3 2 National Instruments Corporation Chapter 3 Signal Connections Signal Connection Descriptions Pin Signal Name Description lt 2 9 gt DIO lt 0 7 gt Digital Input Output lines Line 7 is the MSB and Line 0 is the LSB lt 35 37 gt 39 41 42 DGND Digital Ground These pins are connected to the 6704 device digital ground plane All 6704 device ground planes connect to the computer system s ground signal 1 5V 5 V tThis pin is connected to the computer system s 5 VDC supply through a self resetting circuit breaker 38 40 RFU Reserved for future use 34 66 31 63 28 60 25 VCH lt 0 15 gt Voltage output channels 57 22 54 52 17 15 47 12 44 67 32 64 29 61 26 58 ICH lt 16 31 gt Current output channels 23 21 53 51 16 48 13 45 10 68 33 65 30 62 27 59 AGND lt 0 16 15 31 gt Analog Grounds Each ground pin is 24 55 20 18 50 49 14 shared between one voltage and one current 46 11 channel These pins are connected to the 6704 device analog ground plane All 6704 device ground planes connect to the computer system s ground signal 19 43 56 AGND Additional pins connected to analog ground National Instruments Corporation 3 3 PCI PXI 6704 User Manual Chapter 3 Signal Connections Analog Output Signal Connections Both voltage and cur2. Power up Condition ss 3 6 Digital VO Signal Connections pensieri iese ede Ee aos nis EE GE ESE a ee Bee iii 3 6 Power up Condition ss 3 7 Power Connections ss ri ls N 3 7 National Instruments Corporation v PCI PXI 6704 User Manual Contents Chapter 4 Hardware Overview Bus Interface Circuitry oe eee se ee ed Sk Se ee Here sd EE N EE ee Nonvolatile RAM DAC Control Digital I O Control sees sees se ee Ge ee Ge ee ee Temperature Sensor Chapter 5 Calibration SCH CANDFAON rennes marina External Calibration ee Ge ke ee ee Voltage Output Calibration ees eee ke ee Offset Adjustment iese ese sees ee se ee ee Gain Adjustment Current Output Calibration se ek ee Offset Adjustment iese see see ee ee ee ee Gain Adjustment Saving Calibration Values eee Appendix A Specifications Appendix B Common Questions Appendix C Customer Communication Glossary Index PCI PXI 6704 User Manual vi National Instruments Corporation Contents Figures Figure 1 1 The Relationship between the Programming Environment NI DAQ and Your Hardware 1 4 Figure 3 1 VO Connector Pin Assignment eee se ee ee ee se ee Re Ge Re ee 3 2 Figure 3 2 VCH Connection as a Voltage Output ss 3 4 Figure 3 3 ICH Connection as a Current Output ss 3 5 Figure 3 4 Example Digital VO
3. Connections ese see see ke Ge ee ee ee Ge ee 3 6 Figure 4 1 PCVPXI 6704 Block Diagram iese sesse ese ee se ee ee ee ee ee Ge ee be 4 1 Tables Table 5 1 Calibration Channel Numbers ee ee ee 5 2 National Instruments Corporation vii PCI PXI 6704 User Manual About This Manual This manual describes the mechanical and electrical aspects of the 6704 devices and contains information concerning their configuration installation and operation The 6704 devices are designed for precise DC setpoint applications and provide general purpose digital I O Unless otherwise noted text applies to both 6704 devices the PCI 6704 and PXI 6704 Organization of This Manual The PCI PXI 6704 User Manual is organized as follows National Instruments Corporation Chapter 1 Introduction describes the 6704 devices lists what you need to get started describes software programming choices optional equipment and custom cables and explains how to unpack your 6704 device Chapter 2 Installation and Configuration explains how to install and configure your 6704 device Chapter 3 Signal Connections provides connection instructions for the signals on your 6704 device s I O connector Chapter 4 Hardware Overview contains a functional overview of the 6704 devices and explains the operation of each functional unit making up the devices Chapter 5 Calibration discusses the calibratio
4. bit If you are using NI DAQ calibration is enabled by calling the NI DAQ function Set DAO Device Info deviceNumber infoType infoValue with infoType equal to ND_CALIBRATION_ENABLE and info Value equal to ND YES You may then write to the calibration channels by calling AO Vwrite deviceNumber chan voltage where char is the calibration channel number and voltage is the channel value to be written Table 5 1 lists the channel numbers of the calibration channels Table 5 1 Calibration Channel Numbers Calibration Channel Channel Number Voltage offset Channel 32 Voltage gain Channel 34 Current offset Channel 33 Current gain Channel 35 Voltage Output Calibration There are two adjustments to make for the voltage outputs offset and gain You should perform offset adjustment first It is a good idea to calibrate twice because a large change in the voltage gain channel value could impact the accuracy of the offset calibration Offset Adjustment To calibrate the offset set one of the voltage output channels to 0 V and measure it with a precise voltmeter Then change the voltage offset channel value until the output is zero The voltage you write to the voltage offset channel will be close to zero and increasing it will lower the voltage you measure PCI PXI 6704 User Manual 5 2 National Instruments Corporation Gain Adjustment Chapter 5 Calibration To calibrate the gain
5. its own clock rates handshaking modes buffer configurations and so on A port cannot belong to more than one group digital input output Dynamic Link Library A software module in Microsoft Windows containing executable code and data that can be called or used by Windows applications or by other DLLs Functions and data in a DLL are loaded and linked at run time when they are referenced by a Windows application or other DLLs Dynamic RAM software that controls a specific hardware device such as a DAQ board a method of automatically assigning logical addresses to PCI devices at system startup or other configuration times the ratio of the largest signal level a circuit can handle to the smallest signal level it can handle usually taken to be the noise level normally expressed in decibels National Instruments Corporation G 3 PCI PXI 6704 User Manual Glossary E EPROM EEPROM F floating signal sources function GND H hardware hex IC in INL PCI PXI 6704 User Manual Erasable Programmable Read Only Memory ROM that can be erased electrically and reprogrammed Electrically Erasable Programmable Read Only Memory ROM that can be erased usually by ultraviolet light exposure and reprogrammed signal sources with voltage signals that are not connected to an absolute reference or system ground Also called nonreferenced signal sources Some common examples of floating signal sources are batterie
6. 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 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 driver software Abbreviations acronyms definitions metric prefixes mnemonics and symbols are listed in the Glossary X National Instruments Corporation About This Manual National Instruments Documentation The PCVPXI 6704 User Manual is one piece of the documentation set for your data acquisition system You could have any of several types of documentation depending on the hardware and software in your system Use the different types of documentation you have as follows e 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 e Software documentation Examples of software docu
7. scanned at a rate of 50 us per channel thus a channel can change value a maximum of 1 8 ms after it has been updated by software 8 How are the voltage and current outputs related They are completely independent of each other PCI PXI 6704 User Manual B 2 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 fax on demand 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 qu
8. set the voltage output channel to a voltage near full scale such as 10 V Then change the voltage gain channel value until the output that you measure is as close as possible to the voltage that you wrote to the output channel The voltage you write to the voltage gain channel will be close to 10 V and increasing it will lower the magnitude of the voltage you measure You can also calibrate using several output channels instead of just one by averaging channels together Do this by writing the values to all the channels you wish to average and using a resistive averaging circuit to average the outputs This will reduce the sensitivity of the calibration process to interchannel mismatch the slight differences in the output characteristics of the channels by averaging out these differences Current Output Calibration Offset Adjustment Gain Adjustment There are two adjustments to make for the current outputs offset and gain You should perform offset adjustment first It is a good idea to calibrate twice because a large change in the current gain channel value could impact the accuracy of the offset calibration To calibrate the offset set one of the current output channels to 100 uA and measure it with a precise ammeter Then change the current offset channel value until the output is as close as possible to 100 uA The current you write to the current offset channel will be close to 10 uA and increasing it will lower the cur
9. supply has a total of 0 75 A available The 5 V power supply has a self resetting protection circuit breaker in series If the circuit breaker protection is activated simply remove the circuit causing the heavy current load and the circuit breaker will reset itself For more information on these output pins see the Digital 1 0 and Power Requirement sections in Appendix A Specifications Power rating 0 75 A at 5 V 10 4 55 to 5 25 VDC at 0 75 A AN Warning Under no circumstances should you connect these 5 V power pins directly to ground or to any other voltage source on your 6704 device or any other device Doing so can damage your 6704 device and your computer system National Instruments is NOT liable for damage resulting from such a connection National Instruments Corporation 3 7 PCI PXI 6704 User Manual Hardware Overview This chapter contains a functional overview of the 6704 devices and explains the operation of each functional unit making up the devices The block diagram in Figure 4 1 illustrates the key functional components of the 6704 devices lt Control Address Bus lt _ Interface q Paa Logic A Main Voltage 16 gt Voltage gt Output 7 gt DAC Circuit Circuit X 16 Gel 16 Bit Out Lines gt 2 9 DAC 5 n Main Current 16 D x gt Current Output
10. 6 bit DACs offset and gain are adjusted to minimize the errors of the four outputs Since 6704 devices have excellent channel to channel matching of offset and gain errors minimizing the errors of the four calibration channels also minimizes the errors for all the voltage and current outputs External Calibration Because of the nature of the 6704 device s calibration circuitry the only calibration adjustment you must make is to adjust the values of the four calibration channels to account for time or temperature related drift of the onboard references These four values are loaded into nonvolatile RAM at factory calibration and you should not need to adjust them for at least one year after the date of factory calibration unless you are operating your device at an extreme temperature To perform calibration you need a voltage and current measuring device that is much more accurate than your 6704 device A DMM with an accuracy of at least 10 ppm will generally suffice but be sure to check its specifications Also be sure that no other devices are connected to your 6704 when you calibrate it to ensure that no ground loops can corrupt the calibration National Instruments Corporation 5 1 PCI PXI 6704 User Manual Chapter 5 Calibration Your 6704 device contains a calibration enable bit in a control register to prevent you from accidentally writing to the calibration channels Before you can calibrate the board you must set this
11. DAQ PGI PXI 6704 User Manual Voltage and Current Output Device for PCI PXI CompactPCI Bus Computers ON INSTRUMENTS September 1998 Edition Part Number 322110A 01 Internet Support E mail support natinst com FTP Site ftp natinst com Web Address http www natinst com Bulletin Board Support BBS United States 512 794 5422 BBS United Kingdom 01635 551422 BBS France 01 48 65 15 59 Fax on Demand Support 5124181111 Telephone Support USA Tel 512 795 8248 Fax 512 794 5678 International Offices Australia 03 9879 5166 Austria 0662 45 79 90 0 Belgium 02 757 00 20 Brazil 011 288 3336 Canada Ontario 905 785 0085 Canada Qu bec 514 694 8521 Denmark 45 76 26 00 Finland 09 725 725 11 France 01 48 14 24 24 Germany 089 741 31 30 Hong Kong 2645 3186 Israel 03 6120092 Italy 02 413091 Japan 03 5472 2970 Korea 02 596 7456 Mexico 5 520 2635 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 United Kingdom 01635 523545 National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin Texas 78730 5039 USA Tel 512 794 0100 Copyright 1998 National Instruments Corporation All rights reserved Important Information Warranty Copyright Trademarks The PCI 6704 and PXI 6704 are warranted against defects in materials and workmanship for a period of one year from the date of shipment as eviden
12. Installation and Configuration 2 National Instruments Corporation Which National Instruments document should I read first to get started using DAQ software The release notes document for your application or driver software is always the best starting place What version of NI DAQ must I have to program my 6704 device You must have NI DAQ for PC compatibles version 6 5 or higher for your 6704 device What is the best way to test my device without having to program it The NI DAQ Configuration Utility has a Test menu with some excellent tools for doing simple functional tests of the device such as testing the digital I O lines Also the Test Configuration option will verify that the logical address for the device is current B 1 PCI PXI 6704 User Manual Appendix B Common Questions Timing and Digital 1 0 5 What are the power on states of the DIO lines on the VO connector At system power on and reset all lines are configured as inputs Refer to the Digital VO Control section in Chapter 4 Hardware Overview for more information Analog Output 6 What are the power on states of the voltage and current outputs At system power on and reset all analog outputs are at the values you last saved 7 How fast do the 6704 devices scan channels The 6704 devices have one 16 bit DAC that is time division multiplexed to create the 16 voltage output 16 current output and four calibration output channels The channels are
13. National Instruments 6704 device The 6704 devices are precise DC setpoint devices for PCI and PXI They have a total of 32 analog output channels 16 voltage output and 16 current output channels The 6704 devices also have eight digital I O lines You can use the 6704 devices in a wide variety of DC setpoint and digital T O applications With the 6704 devices your PC system can serve as a digital I O system controller for laboratory testing production testing and industrial process monitoring and control These devices can do the following e Generate experimental stimuli e Generate analog functions e Connect to a variety of signal types including Electromechanical relays LEDs Optically isolated solid state relays and I O module mounting racks Voltage and current excitation for precision transducers Detailed specifications for the 6704 devices are in Appendix A Specifications National Instruments Corporation 1 1 PCI PXI 6704 User Manual Chapter 1 Introduction What You Need to Get Started Unpacking To set up and use your 6704 device you will need the following Q One of the following devices PCI 6704 PXI 6704 Q PCVPXI 6704 User Manual Q One of the following software packages and documentation ComponentWorks LabVIEW for Windows LabWindows CVI for Windows Measure NI DAQ for PC compatibles VirtualBench Q PC with a free PCI slot or PXI chassis with a free slot UL 68 pin
14. ables connector blocks and other accessories as follows e Cables and cable assemblies shielded and ribbon e Connector blocks shielded and unshielded screw terminals For more specific information about these products refer to your National Instruments catalogue or call the office nearest you Custom Cabling National Instruments offers cables and accessories for you to prototype your application or to use if you frequently change module interconnections If you want to develop your own cable mating connectors and a backshell kit for making custom 68 pin cables are available from National Instruments part number 776832 01 Refer to your National Instruments catalogue for specific information National Instruments Corporation 1 5 PCI PXI 6704 User Manual Installation and Configuration This chapter explains how to install and configure your 6704 device Software Installation Install your software before you install your 6704 device Refer to the appropriate release notes indicated below for specific instructions on the software installation sequence 1 Install your application software If you are using LabVIEW LabWindows CVI or other National Instruments application software packages refer to the appropriate release notes 2 Install the NI DAQ driver software Refer to your NI DAQ release notes and follow the instructions given there for your operating system and application software package You ca
15. alues will become the power on states Digital 1 0 Control The 6704 devices have eight digital I O lines configured as one 8 bit port You can configure each line independently as an input or output The DIO lines have 16 mA of sink capability and 16 mA of source capability All digital lines are TTL compatible At power up all digital lines are configured as inputs Temperature Sensor PCI PXI 6704 User Manual The onboard temperature sensor measures the air temperature flowing over the board This sensor is positioned near the onboard precision voltage reference which can be affected by extreme temperatures This sensor has a serial digital interface 4 2 National Instruments Corporation Calibration This chapter discusses the calibration procedures for your 6704 device Calibration is the process of minimizing output errors by making small circuit adjustments On your 6704 device you write values to four calibration channels to make these adjustments Self Calibration The 6704 devices perform continuous self calibration In addition to the 16 accessible voltage channels and 16 accessible current channels there are two voltage channels and two current channels that are continuously updated and refreshed along with the others These four channels are the voltage offset the voltage gain the current offset and the current gain channels The outputs of these four channels are compared to onboard references and the 1
16. block diagram program PCI PXI 6704 User Manual Glossary W watts PCI PXI 6704 User Manual G 8 National Instruments Corporation Index Numbers 5 V signal damage due to faulty connections warning 3 7 description table 3 3 self resetting circuit breaker 3 7 B 1 short circuiting B 1 16 bit DAC 4 2 A AGND signal table 3 3 AGND lt 0 16 15 31 gt signal table 3 3 analog output signal connections 3 3 to 3 6 current output 3 4 to 3 6 ICH connection as current output figure 3 5 power up condition 3 6 questions about B 2 VCH connection as voltage output figure 3 4 voltage output 3 4 analog output specifications A 1 to A 2 current output A 2 dynamic characteristics A 2 stability A 2 transfer characteristics A 1 voltage output A 1 to A 2 AO Calibrate function 5 4 AO_VWrite function 5 2 block diagram of PCI PXI 6704 4 1 bulletin board support C 1 National Instruments Corporation bus interface circuitry 4 2 specifications A 3 C cabling custom 1 5 calibration 5 1 to 5 4 channel numbers of calibration channels table 5 2 current output calibration 5 3 to 5 4 external calibration 5 1 to 5 2 saving calibration values 5 4 self calibration 5 1 voltage output calibration 5 2 to 5 3 circuit breaker self resetting on 5 V supply 3 7 B 1 common questions B 1 to B 2 analog output B 2 general information B 1 installation and configuration B 1 timing and d
17. cable type SH68 68 D1 Q 68 pin terminal block type CB 68 PCI PXI 6704 User Manual Your 6704 device is shipped in an antistatic package to prevent electrostatic damage to the device Electrostatic discharge can damage several components on the device To avoid such damage in handling the device 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 PC chassis before removing the device from the package e Remove the device from the package and inspect the device for loose components or any other sign of damage Notify National Instruments if the device appears damaged in any way Do not install a damaged device into your computer Never touch the exposed pins of connectors 1 2 National Instruments Corporation Chapter 1 Introduction Software Programming Choices There are several options to choose from when programming your National Instruments DAQ hardware You can use LabVIEW LabWindows CVI ComponentWorks VirtualBench or other application development environments in conjunction with NI DAQ National Instruments Application Software ComponentWorks contains tools for data acquisition and instrument control built on NI DAQ driver software ComponentWorks provides a higher level programming interface for building virtual instruments through standard OLE controls and DLLs With ComponentWorks you can us
18. ced 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 editions of this document without prior notice to holders of this edition The reader should consult National Instruments if
19. dance ses see ee ee 1 GQ min Output compliance eee 0 to 10 V Absolute aCCUFACY ees sesse ee ee ee 2 uA max NO1SE ied ian we anise 1 uA rms DC to 1 MHz PLOLECHON insistent Short circuit and open circuit Power up Staten cesis Independent user defined values Dynamic Characteristics Settling time including channel latency Accuracy Time 0 1 1 8 ms typ 5 6 ms max 0 01 3 6 ms typ 11 2 ms max 0 001 14 4 ms typ 48 8 ms max Stability Offset temperature coefficient voltade ER OE 5 uV C CUEN vues EE honte te dE 10 nA C Gain temperature coefficient ei he 1 ppm C CUEN ER tn nt este 2 ppm C PCI PXI 6704 User Manual A 2 National Instruments Corporation Appendix Specifications Digital 1 0 Number of channels iese see ee ee 8 VO Compatibility iese sesse se see ee se ee ee TTL Power on state Input high impedance Digital logic levels Level Min Max Input low voltage 0 8 V Input high voltage 2 0 V Output low voltage 0 45 V Io 16 mA Output high voltage 2 4 V lou 16 mA Input leakage current 10 HA Bus Interface TYPE RE EE Abe Slave Power Reduirement EE Ee 1 A HD VE OE R 70 mA SD EE OE RE 70 mA Cr Note These power usage figures do not include the power used by external devices that are connected to the fused supply present on the I O connector They assume that all voltage and curren
20. driver software for DAQ hardware National Instruments Corporation G 5 PCI PXI 6704 User Manual Glossary noise nvRAM 0 operating system output limits output settling time PC port ppm R RAM resolution RTSI PCI PXI 6704 User Manual an undesirable electrical signal Noise comes from external sources such as the AC power line motors generators transformers fluorescent lights soldering irons CRT displays computers electrical storms welders radio transmitters and internal sources such as semiconductors resistors and capacitors Noise corrupts signals you are trying to send or receive nonvolatile RAM base level software that controls a computer runs programs interacts with users and communicates with installed hardware or peripheral devices the upper and lower voltage or current outputs for an analog output channel The output limits determine the polarity and voltage reference settings for a board the amount of time required for the analog output voltage to reach its final value within specified limits personal computer 1 a communications connection on a computer or a remote controller 2 a digital port consisting of four or eight lines of digital input and or output parts per million random access memory the smallest signal increment that can be detected by a measurement system Resolution can be expressed in bits in proportions or in percent of full scale For exam
21. e all of the configuration tools resource management utilities and interactive control utilities included with NI DAQ 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 VirtualBench features VIs that combine DAQ products software and your computer to create a standalone instrument with the added benefit of the processing display and storage capabilities of your computer VirtualBench instruments load and save waveform data to disk in the same forms that can be used in popular spreadsheet programs and word processors Using ComponentWorks Lab VIEW LabWindows CVI or VirtualBench software will greatly reduce the development time for your data acquisition and control application National Instruments Corporation 1 3 PCI PXI 6704 User Manual C
22. endix C Customer Communication of this manual Turn off and unplug your PXI controller Choose an unused PXI slot in your system Remove the filler panel for the slot you have chosen Hu SR Insert the PXI 6704 into a PXI chassis slot Use the injector ejector handle to fully insert the device into the chassis 6 Screw the front panel of the PXI 6704 to the front panel mounting rail of the system 7 Plug in and turn on your computer Your PXI 6704 is installed You are now ready to configure your software Refer to your software documentation for configuration instructions Device Configuration PCI PXI 6704 User Manual Due to the National Instruments standard architecture for data acquisition and the PCI and PXI bus specifications 6704 devices are completely software configurable The PCI 6704 is fully compatible with the industry standard PCI Local Bus Specification Revision 2 0 and the PXI 6704 is fully compatible with the PXI Specification Revision 1 0 These specifications allow the PCI and PXI systems to automatically perform all bus related configurations and require no user interaction Bus related configuration includes setting the device base memory address and interrupt channel 2 2 National Instruments Corporation Signal Connections This chapter provides connection instructions for the signals on your 6704 device s VO connector AN Warning Connections that exceed any of the maximum ratings of i
23. 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 misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside
24. estions 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 services at United States 512 794 5422 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 01 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 C 1 PCI PXI 6704 User Manual Fax on Demand Support Fax on Demand is a 24 hour information retrieval system containing a library of documents on a wide range of technical information You can access Fax on Demand from a touch tone telephone at 512418 1111 E Mail Support Currently USA Only You can submit technical support questions to the applications engineering team through e mail at the Internet address listed below Remember to include your name address and phone number so we can contact you with solutions and suggestions support natinst com Telephone and Fax Support National Instruments has branch offices all over the world Use the list bel
25. fore 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 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 PCI PXI 6704 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 6704 device serial number Interrupt level of 6704 dev
26. gned by the NI DAQ Configuration Utility If you need to restore the factory calibration values load them by calling AO_Calibrate deviceNumber 1 5 For more information consult the NI DAQ Function Reference Manual 5 4 National Instruments Corporation Specifications This appendix lists specifications for 6704 devices These specifications are valid for an ambient temperature of 0 to 55 C unless otherwise stated Analog Output Number of voltage channels 16 Number of current channels 16 R solution esos cass RE eo eed ER Ee 16 bit Recommended warm up time 15 minutes Transfer Characteristics INLEES ee T 1 LSB max BE N N EED 1 LSB max Monotonicity 16 bits guaranteed Voltage Output Range ss hs DR nn Rien 10 1 V Output coupling DC Output impedance ee see se ee ee 0 1 Q max Current drive ssh 10 mA max Load capacitance ee see se se ee 10 000 pF max Protection ees esse se ee ee ee ee ee Short circuit to ground Absolute accuracy esse ee ee ee ee 1 mV max National Instruments Corporation A 1 PCI PXI 6704 User Manual Appendix Specifications GEREEN EE EE N 100 uV rms DC to 1 MHz Power up State ese see se ee ee ee ee Independent user defined values Current Output RANGER nn ee Mein nn 0 1 to 20 2 mA TYPE sienne titane Source does not require external excitation source Output impe
27. hapter 1 Introduction NI DAQ Driver Software PCI PXI 6704 User Manual The NI DAQ driver software is included at no charge with all National Instruments DAQ hardware NI DAQ is not packaged with accessory products 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 timer operations SCXI RTSI self calibration messaging and acquiring data to extended memory 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 programing languages or National Instruments application software your application uses the NI DAQ driver software as illustrated in Figure 1 1 ComponentWorks Conventional LabVIEW Programming Environment LabWindows CVI or VirtualBench NI DAQ Driver Software Personal s Ed A Computer or eave Workstation Figure 1 1 The Relationship between the Programming Environment NI DAQ and Your Hardware 1 4 National Instruments Corporation Chapter 1 Introduction Optional Equipment National Instruments offers a variety of products to use with your 6704 device including c
28. ice Base memory address of hardware Programming choice National Instruments software Other boards in system Base I O address of other boards Interrupt level of other boards Other Products Computer make and model Microprocessor Clock frequency or speed Type of video board installed Operating system version Operating system mode Programming language Programming language version Other boards in system Base I O address of other boards Interrupt level of other boards 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 PCI PXI 6704 User Manual Edition Date September 1998 Part Number 322110A 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 E Mail Address Phone Fax Mail to Technical Publications Fax to Technical Publications National Instruments Corporation National Instruments Corporation 6504 Bridge Point Parkway 512 794 5678 Austin Texas 78730 5039 Glossary Prefix Meaning Value n nano 107 u
29. igital VO B 2 configuration 2 2 B 1 current output 3 4 to 3 6 analog output specifications A 2 damage due to high voltage warning 3 5 ICH connection as current output figure 3 5 minimizing effect of return current channel 3 5 to 3 6 power up condition 3 6 current output calibration 5 3 to 5 4 gain adjustment 5 3 to 5 4 offset adjustment 5 3 custom cabling 1 5 customer communication xi C 1 to C 2 PCI PXI 6704 User Manual Index D DAC 16 bit 4 2 device configuration 2 2 DGND signal table 3 3 digital VO signal connections 3 6 to 3 7 digital VO control 4 2 example connections figure 3 6 line by line direction control note 3 7 power up condition 3 7 timing and digital I O B 2 digital I O specifications A 3 DIO lt 0 7 gt signal table 3 3 documentation conventions used in manual x National Instruments documentation xi organization of manual ix E electronic support services C 1 to C 2 e mail support C 2 environment specifications A 4 equipment optional 1 5 F fax and telephone support numbers C 2 Fax on Demand support C 2 FTP support C 1 G gain adjustment current output calibration 5 3 to 5 4 voltage output calibration 5 3 H hardware functional overview 4 1 to 4 2 installation 2 1 to 2 2 PCI PXI 6704 User Manual 1 2 ICH connection as current output figure 3 5 ICH lt 0 15 gt signal table 3 3 installation device configuration 2 2 hardwa
30. mentation you may have are the LabVIEW LabWindows CVI Virtual Bench Component Works Measure and NI DAQ documentation After you set up your hardware system use either the application software or the NI DAQ documentation to help you write your application If you have a large complicated system it is worthwhile to look through the software documentation before you configure your hardware e Accessory installation guides or manuals If you are using accessory products read the terminal block and cable assembly installation guides or accessory board user manuals They explain how to physically connect the relevant pieces of the system Consult these guides when you are making your connections 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 C Customer Communication at the end of this manual National Instruments Corporation xi PCI PXI 6704 User Manual Introduction This chapter describes the 6704 devices lists what you need to get started describes software programming choices optional equipment and custom cables and explains how to unpack your device About the PCI PXI 6704 Thank you for purchasing a
31. micro 10 m milli 103 k kilo 105 M mega 106 G giga 10 Numbers Symbols s degrees negative of or minus Q ohms per percent plus or minus positive of or plus A A amperes A D analog to digital ANSI American National Standards Institute API application programming interface National Instruments Corporation G 1 PCI PXI 6704 User Manual Glossary base address bit bus byte C C channel D A DAC DAQ DC PCI PXI 6704 User Manual a memory address that serves as the starting address for programmable registers All other addresses are located by adding to the base address one binary digit either O or 1 the group of conductors that interconnect individual circuitry in a computer Typically a bus is the expansion vehicle to which I O or other devices are connected eight related bits of data an eight bit binary number Also used to denote the amount of memory required to store one byte of data Celsius pin or wire lead to which you apply or from which you read the analog or digital signal Analog signals can be single ended or differential For digital signals you group channels to form ports Ports usually consist of either four or eight digital channels digital to analog D A converter data acquisition 1 collecting and measuring electrical signals from sensors transducers and test probes or fixtures and inputting them to a computer for processing 2 collecti
32. n now install your hardware Hardware Installation You can install the 6704 device in any available expansion slot in your computer However to achieve best noise performance leave as much room as possible between the 6704 device and other boards and hardware The following are general installation instructions but consult your computer user manual or technical reference manual for specific instructions and warnings PCI 6704 1 Write down your PCI 6704 device serial number in the PCI PXI 6704 Hardware and Software Configuration Form in Appendix C Customer Communication of this manual 2 Turn off and unplug your computer Remove the top cover or access port to the I O channel 4 Remove the expansion slot cover on the back panel of the computer National Instruments Corporation 2 1 PCI PXI 6704 User Manual Chapter 2 Installation and Configuration 5 Insert the PCI 6704 into a 5 V PCI slot Gently rock the device to ease it into place It may be a tight fit but do not force the device into place 6 Screw the mounting bracket of the PCI 6704 device to the back panel rail of the computer 7 Replace the cover 8 Plug in and turn on your computer Your PCI 6704 is installed You are now ready to configure your software Refer to your software documentation for configuration instructions PXI 6704 1 Write down your PXI 6704 device serial number in the PCI PXI 6704 Hardware and Software Configuration Form in App
33. n procedures for your 6704 device Appendix A Specifications lists specifications for the 6704 devices Appendix B Common Questions contains commonly asked questions and their answers relating to usage and special features of your 6704 device Appendix C Customer Communication contains forms you can use to request help from National Instruments or to comment on our products The Glossary contains an alphabetical list and description of terms used in this manual including abbreviations acronyms definitions metric prefixes mnemonics symbols and terms The ndex alphabetically lists the topics in this manual including the page where you can find each one ix PCI PXI 6704 User Manual About This Manual Conventions Used in This Manual bold bold italic italic monospace NI DAQ PCI PXI 6704 User Manual The following conventions are used in this manual This icon to the left of bold italicized text denotes a note which alerts you to important information This icon to the left of bold italicized text denotes a warning which advises you of precautions to take to avoid being electrically shocked Angle brackets containing numbers separated by an ellipsis represent a range of values associated with a bit or signal name For example Line lt 0 7 gt stands for Line 0 through 7 The symbol indicates that the text following it applies only to a specific 6704 device Bold text denotes the names of
34. ng and measuring the same kinds of electrical signals with A D and or DIO boards plugged into a computer and possibly generating control signals with D A and or DIO boards in the same computer direct current G 2 National Instruments Corporation default setting device digital input group digital output group DIO DLL DRAM drivers driver software dynamic configuration dynamic range Glossary a default parameter value recorded in the driver In many cases the default input of a control is a certain value often 0 that means use the current default setting For example the default input for a parameter may be do not change current setting and the default setting may be no AMUX 64T boards If you do change the value of such a parameter the new value becomes the new setting You can set default settings for some parameters in the configuration utility or by manually using switches located on the device 1 a plug in data acquisition board card or pad that can contain multiple channels and conversion devices Plug in boards PCMCIA cards and devices such as the DAQPad 1200 which connects to your computer parallel port are all examples of DAQ devices a collection of digital input ports You can associate each group with its own clock rates handshaking modes buffer configurations and so on A port cannot belong to more than one group a collection of digital output ports You can associate each group with
35. nput or output signals on the 6704 device can damage the 6704 device and the computer Maximum input ratings for each signal are given in this chapter under the discussion of that signal National Instruments is NOT liable for any damages resulting from any incorrect signal connections 1 0 Connector Pin Assignments Figures 3 1 shows the I O connector pin assignments for the 6704 devices National Instruments Corporation 3 1 PCI PXI 6704 User Manual Chapter 3 Signal Connections 5V 1 35 DGND DIOO 2 36 DGND DIO1 3 137 DGND DIO2 4 38 RFU DIO3 5 39 DGND DIO4 6 40 RFU DIO5 7 41 DGND DIO6 8 42 DGND DIO7 9 43 AGND ICH31 10 44 VCH15 AGND15 AGND31 11 45 ICH30 VCH14 12 46 AGND14 AGND30 ICH29 13 47 VCH13 AGND13 AGND29 14 48 ICH28 VCH12 15 49 AGND12 AGND28 ICH27 16 50 AGND11 AGND27 VCH11 17 51 ICH26 AGND10 AGND26 18 52 VCH10 AGND 19 53 ICH25 AGND9 AGND25 20 54 VCH9 ICH24 21 55 AGND8 AGND24 VCH8 22 56 AGND ICH23 23 57 VCH7 AGND7 AGND23 24 58 ICH22 VCH6 25 59 AGND6 AGND22 ICH21 26 60 yCH5 AGND5 AGND21 27 61 ICH20 VCH4 28 62 AGND4 AGND20 ICH19 29 63 VCH3 AGND3 AGND19 30 64 cHig VCH2 31165 AGND2 AGND18 ICH17 32166 VCH1 AGND1 AGND17 33 67 ICH16 VCHO 34 68 AGNDO AGND16
36. oducts 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 Contents About This Manual Organization of This Manual ss ix Conventions Used in This Manual X National Instruments Documentation esse esse see se ee ee Re GR Re RA ee ee ee ge ee xi Customer COMMUNICATION serr e EE ER RE et tie N xi Chapter 1 Introduction About the PCUPXI OTOM nine en Se Ke Ee ee Moines terne Puissant 1 1 What You Need to Get Started siennes 1 2 Bird EE OE ER RE EE EE Re ae OO Ant 1 2 Software Programming Choices ss 1 3 National Instruments Application Software ees ese ee se se ee ee Ge Se ee ee 1 3 NI DAQ Driver Software sees sees es e ee Re ee ER e Ge ee E ee ee Ge ee 1 4 Optional Equipment sore dee en Se de es Ses De ee annee Seed SEG KS cba ek ged ee ts 1 5 Custom Cabling ssh EE EE ED 1 5 Chapter 2 Installation and Configuration Software Installation eds see Ee Avcdkccseveedtheeteecevencetendevevdovedeodddsdesestudvensaeednetedheescnccoveeetense 2 1 Hardware Installation siennes 2 1 Device Configurations ss een oine Ges Seed di Bes Ee GES eh in sn dite 2 2 Chapter 3 Signal Connections I O Connector Pin Assignment ss 3 1 Signal Connection Descriptions ss 3 3 Analog Output Signal Connections ss 3 4 MEES MO N EE ES EE E 3 4 Power up Condition 3 4 Current Output esse N N DANS AE GN 3 5
37. oltages a load with high common mode voltages can damage the 6704 devices National Instruments is NOT liable for any damages resulting from any such signal connections Figure 3 3 shows how to connect a current channel ICH as a current output ICH 7 0 1 to 20 2 mA Load AGND PCI PXI 6704 Figure 3 3 ICH Connection as a Current Output Because each current channel shares a ground line with a voltage channel you should try to minimize the effect of the return current from your current channel on the voltage that you are outputting on your voltage channel For example if you output 20 mA on a current channel and return that current to the 6704 device along the shared ground line in a cable with an impedance of 0 1 you will see a 2 mV drop in the voltage output by the voltage channel sharing the ground line You can approach this problem in the following ways National Instruments Corporation 3 5 PCI PXI 6704 User Manual Chapter 3 Signal Connections Use a shorter cable to minimize the impedance of the shared ground line Use separate wiring for VCH and ICH ground return to minimize common ground impedance Use different pairs of voltage and current channels to keep your sensitive voltage outputs separate from your higher output current channels Power up Condition All current outputs are within 1 1 mA maximum of their user defined values within 0 5 s of po
38. ow to find the technical support number for your country If there is no National Instruments office in your country contact the source from which you purchased your software to obtain support Country Australia Austria Belgium Brazil Canada Ontario Canada Qu bec Denmark Finland France Germany Hong Kong Israel Italy Japan Korea Mexico Netherlands Norway Singapore Spain Sweden Switzerland Taiwan United Kingdom United States PCI PXI 6704 User Manual Telephone 03 9879 5166 0662 45 79 90 0 02 757 00 20 011 288 3336 905 785 0085 514 694 8521 45 76 26 00 09 725 725 11 01 48 14 24 24 089 741 31 30 2645 3186 03 6120092 02413091 03 5472 2970 02 596 7456 5 520 2635 0348 433466 32 84 84 00 2265886 91 640 0085 08 730 49 70 056 200 51 51 02 377 1200 01635 523545 512 795 8248 C 2 Fax 03 9879 6277 0662 45 79 90 19 02 757 03 11 011 288 8528 905 785 0086 514 694 4399 45 76 26 02 09 725 725 55 01 48 14 24 14 089 714 60 35 2686 8505 03 6120095 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 512 794 5678 National Instruments Corporation 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 be
39. ple a system has 12 bit resolution one part in 4 096 resolution and 0 0244 of full scale Real Time System Integration G 6 National Instruments Corporation settling time slot system RAM T transfer rate TTL update update rate V v VDC VI National Instruments Corporation G 7 Glossary seconds the amount of time required for a voltage to reach its final value within specified limits a position where a module can be inserted into the PCI bus RAM installed on a personal computer and used by the operating system as contrasted with onboard RAM the rate measured in bytes s at which data is moved from source to destination after software initialization and set up operations the maximum rate at which the hardware can operate transistor transistor logic the output eguivalent of a scan One or more analog or digital output samples Typically the number of output samples in an update is egual to the number of channels in the output group For example one pulse from the update clock produces one update which sends one new sample to every analog output channel in the group the number of output updates per second volts volts direct current Virtual Instrument 1 a combination of hardware and or software elements typically used with a PC that has the functionality of a classic stand alone instrument 2 a LabVIEW software module VI which consists of a front panel user interface and a
40. re 2 1 to 2 2 questions about B 1 software 2 1 unpacking the PCI PXI 6704 1 2 T O connector overview 4 2 pin assignments figure 3 2 signal connection descriptions table 3 3 manual See documentation National Instruments application software 1 3 NI DAQ driver software 1 4 nonvolatile RAM nvRAM nonvolatile RAM DAC control 4 2 saving calibration values in 5 4 0 offset adjustment current output calibration 5 3 voltage output calibration 5 2 optional equipment 1 5 P PCI PXI 6704 block diagram 4 1 common questions B 1 to B 2 optional equipment 1 5 overview and features 1 1 requirements for getting started 1 2 National Instruments Corporation software programming choices 1 3 to 1 4 National Instruments application software 1 3 NI DAQ driver software 1 4 unpacking 1 2 physical specifications A 4 pin assignments for I O connector figure 3 2 power connections 3 7 B 1 See also 5 V signal power requirement specifications A 3 power up condition current output 3 6 digital I O signals 3 7 voltage output 3 4 Q questions about PCI PXI 6704 B 1 to B 2 analog output B 2 general information B 1 installation and configuration B 1 timing and digital I O B 2 R RAM See nonvolatile RAM nvRAM requirements for getting started 1 2 RFU signal table 3 3 S saving calibration values 5 4 self resetting circuit breaker for 5 V supply 3 7 B 1 Set_DAQ_Device_Info func
41. 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 ComponentWorks CVI LabVIEW Measure NI DAQ PXI RTSI SCXI VirtualBench 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 when National Instruments products are being used National Instruments pr
42. rent outputs are available on the 6704 devices This section describes how to make connections for each type of output A 68 pin cable such as the SH68 68 D1 cable is required Figure 3 2 shows how to connect the voltage channel VCH outputs VCH Load 10 1 V AGND PCI PXI 6704 Floating Load Figure 3 2 VCH Connection as a Voltage Output Voltage Output You can connect a floating load to your 6704 device at the voltage output channel N Warning Because 6704 devices are not electrically isolated from high voltages a load with high common mode voltages can damage the 6704 devices National Instruments is NOT liable for any damages resulting from any such signal connections Your 6704 device has a bipolar voltage range of 10 1 to 10 1 V Maximum load current is 10 mA for 16 bit linearity Power up Condition All voltage outputs are at their user defined values to full accuracy within 1 s of power up board reset PCI PXI 6704 User Manual 3 4 National Instruments Corporation Current Output Chapter 3 Signal Connections You can connect a floating or grounded load to your 6704 device at the current output channel You do not need an external floating power supply to complete the controlled current loop You can control the current loop from 0 1 to 20 2 mA The compliance for the current loop is 0 V to 10 VDC N Warning Because 6704 devices are not electrically isolated from high v
43. rent you measure To calibrate the gain set the current output channel to a current near full scale such as 20 mA Then change the current gain channel value until the output that you measure is as close as possible to the current that you wrote to the output channel The current you write to the current gain channel will be close to 19 608 mA and increasing it will lower the current you measure National Instruments Corporation 5 3 PCI PXI 6704 User Manual Chapter 5 Calibration You can also calibrate using several output channels instead of just one by adding channels together Do this by writing the values to all the channels you wish to add and summing the outputs by connecting them together This will reduce the sensitivity of the calibration process to interchannel mismatch the slight differences in the output characteristics of the channels by averaging out these differences Saving Calibration Values PCI PXI 6704 User Manual When you have finished calibration you will want to write your calibration values into nonvolatile RAM This will ensure that your new calibration values are permanently saved and automatically loaded when the card is powered on Calibration values are saved and restored through the AO Calibrate deviceNumber operation EEPROMloc function call in NI DAQ To save your calibration values make the following call AO_Calibrate deviceNumber 2 1 where deviceNumber refers to the device number assi
44. s transformers or thermocouples a set of software instructions executed by a single line of code that may have input and or output parameters and returns a value when executed ground signal or bit the physical components of a computer system such as the circuit boards plug in boards chassis enclosures peripherals cables and so on hexadecimal hertz the number of scans read or updates written per second integrated circuit inches Integral Nonlinearity a measure in LSB of the worst case deviation from the ideal A D or D A transfer characteristic of the analog I O circuitry G 4 National Instruments Corporation interrupt interrupt level VO KB kS LED LSB M m MB MSB multitasking NC NI DAQ Glossary a computer signal indicating that the CPU should suspend its current task to service a designated activity the relative priority at which a device can interrupt Input output the transfer of data to from a computer system involving communications channels operator interface devices and or data acquisition and control interfaces current output high current output low kilobytes 1 024 bytes when referring to memory 1 000 samples light emitting diode least significant bit meters megabytes of memory most significant bit a property of an operating system in which several processes can be run simultaneously normally closed or not connected National Instruments
45. t outputs are fully loaded National Instruments Corporation A 3 PCI PXI 6704 User Manual Appendix Specifications Physical Dimensions not including connectors PO T 67 04 seaside nr setae sii 9 9 by 17 5 cm 3 9 by 6 9 in PXI 6704 oo ee GES See EERS KEES eles 10 by 16 cm 3 9 by 6 3 in T O conneCtOF ees see se see ee 68 pin male Environment Operating Temperature 0 to 55 C ambient Relative humidity ees esse esse se ee ee 5 to 90 noncondensing Storage Temperature sis 20 to 70 C ambient Relative humidity iese sesse eee ee ee 5 to 90 noncondensing PCI PXI 6704 User Manual A 4 National Instruments Corporation Common Questions This appendix contains commonly asked questions and their answers relating to usage and special features of your 6704 device General Information 1 What if I short circuit the power supply on the 6704 connector Pin 1 of the I O connector is connected to the 5 V supply from the PCI or PXI bus power supply This pin is referenced to GND and can be used to power external circuitry The 5 V supply has a total of 0 75 A available This power supply has a self resetting protection circuit breaker in series If the circuit breaker protection is activated simply remove the circuit causing the heavy current load and the circuit breaker will reset itself For more information on this output pin see the Power Requirement section in Appendix A Specifications
46. tion 5 2 signal connections 3 1 to 3 7 analog output 3 3 to 3 6 current output 3 4 to 3 6 ICH connection as current output figure 3 5 power up condition 3 6 National Instruments Corporation Index VCH connection as voltage output figure 3 4 voltage output 3 4 digital VO 3 6 to 3 7 exceeding maximum ratings warning 3 1 T O connector pin assignments figure 3 2 signal connection descriptions table 3 3 power connections 3 7 software installation 2 1 software programming choices 1 3 to 1 4 National Instruments application software 1 3 NI DAQ driver software 1 4 specifications A 1 to A 4 analog output A 1 to A 2 bus interface A 3 digital VO A 3 environment A 4 physical A 4 power requirements A 3 T technical support C 1 to C 2 telephone and fax support numbers C 2 temperature sensor 4 2 timing and digital I O B 2 U unpacking the PCI PXI 6704 1 2 PCI PXI 6704 User Manual Index V VCH connection as voltage output figure 3 4 VCH lt 0 15 gt signal table 3 3 voltage output analog output specifications A 1 to A 2 connecting floating load 3 4 damage due to high voltage warning 3 4 power up condition 3 4 VCH connection as voltage output figure 3 4 voltage output calibration 5 2 to 5 3 gain adjustment 5 3 offset adjustment 5 2 PCI PXI 6704 User Manual l 4 National Instruments Corporation
47. wer up board reset The current outputs will settle to their user defined values to full accuracy within 7 s of power up board reset Digital 1 0 Signal Connections Figure 3 4 illustrates example signal connections for three typical digital T O applications 5V Son LED A IN Line 0 R DIO gt Line 1 Line lt 0 7 gt TTL Signal 45V l a Line 2 Switch T DGND VO Connector PCI PXI 6704 Figure 3 4 Example Digital 1 0 Connections In Figure 3 4 line 0 is configured for digital output lines 1 and 2 are configured for digital input PCI PXI 6704 User Manual 3 6 National Instruments Corporation Chapter 3 Signal Connections Digital input applications include receiving TTL signals and sensing external device states such as the switch in Figure 3 4 Digital output applications include sending TTL signals and driving external devices such as the LED shown in Figure 3 4 LUF Note The 6704 devices allow line by line direction control of digital I O connections Refer to Appendix Specifications for a list of the digital VO signal ratings Power up Condition At power up all of the DIO lines on the 6704 devices are configured as input lines Power Connections Pin 1 on the VO connector is connected to the 5 V supply from the PCI or PXI bus power supply This pin is referenced to DGND and can supply power to external circuitry The 5 V
48. z s nvRAM RAM Data Circuit Circuit X 16 Oo 9 gt DAC ia MN Control gt RAM nvSRAM lt Addr Ctrl Digital DIO Lines lt 7 0 gt gt gt VO Serial p Number EEPROM L_a Temperature Sensor ar 5 V 0 75 A Self Resetting Circuit Breaker Figure 4 1 PCI PXI 6704 Block Diagram National Instruments Corporation 4 1 PCI PXI 6704 User Manual Chapter 4 Hardware Overview Bus Interface Circuitry 1 0 Connector The bus interface circuitry monitors the PCI or PXI bus If the bus address matches the 6704 device s address the board is enabled and the corresponding register on the 6704 is accessed All user VO is transmitted through a 68 pin connector Refer to the Custom Cabling section in Chapter 1 Introduction and to Chapter 3 Signal Connections for additional information Nonvolatile RAM DAC Control The 6704 devices have one 16 bit DAC that is time division multiplexed to create the 16 voltage output 16 current output and four calibration channels Each channel has a track and hold circuit to maintain the channel value between DAC updates Data is stored in a nonvolatile RAM nvRAM The nvRAM DAC control reads the DAC channel data stored in the nvRAM and updates the DAC periodically The nvRAM DAC control also controls the analog demultiplexing circuits to route the DAC output to the correct analog output channel You can choose to save nvRAM data so that the current output v
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