SCXI-2400 User Manual - National Instruments
Contents
1. WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE C USTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF N ATIONAL I NSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER N ATIONAL I NSTRUMENTS 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 owner2. 38 4 kbps 1 000 1 000 19 2 kbps 500 500 9600 bps 250 250 4800 bps 125 125 2400 bps 60 60 1200 bps 30 30 600 bps 15 15 300 bps 7 7 National Instruments Corporation B 1 SCXI 2400 User Manual Customer Communication Appendix B 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 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 dri
3. On 1200 bps Off Off On Off 2400 bps Off Off On On 4800 bps Off On Off Off 9600 bps Off On Off On 19 2 kbps Off On On Off 38 4 kbps Off On On On 57 6 kbps On Off Off Off Reserved On Off Off On Reserved On Off On Off Reserved On Off On On Reserved On On Off Off Reserved On On Off On Reserved On On On Off Disabled On On On On Chapter 2 Con guration and Installation National Instruments Corporation 2 3 SCXI 2400 User Manual Figure 2 1 Baud Rate and Address Setting Examples Hardware Installation You can install the SCXI 2400 in any available SCXI chassis slot After you have made any necessary changes and have verified and recorded the switch settings on the form in Appendix B Customer Communication you are ready to install the SCXI 2400 The following are general installation instructions consult your SCXI Chassis User Manual for specific instructions and warnings 1 Turn off the computer that contains the serial port or disconnect it from your SCXI chassis 2 Turn off the SCXI chassis Do not insert the SCXI 2400 into a chassis that is turned on or you may damage your module 3 Insert the SCXI 2400 into the module guides Gently guide the module into the back of the slot until the connectors make good contact If the SCXI 2400 adapter board has been previously installed in the rear of the chassis the
4. Figure 2 1 shows some examples of HDLC address settings If you are controlling your chassis via the RS 232 port on the SCXI 2400 make sure you note the HDLC address because it must match the address in your software configuration Baud Rate Selection You must specify the baud rate the signal rate over the serial port expressed in bits per second If you have multiple chassis cabled to the same RS 485 network you must configure all the chassis on the same Chapter 2 Con guration and Installation SCXI 2400 User Manual 2 2 National Instruments Corporation network for the same baud rate Set the baud rate with switches 9 through 12 on the front panel of the SCXI 2400 Use Table 2 1 to determine the appropriate settings for your baud rate If you want to disable the SCXI 2400 without removing it from the chassis set the four baud rate switches to the disabled setting shown in Table 2 1 The SCXI 2400 will not control the chassis but you can still use the chassis as a direct cable connection between a plug in DAQ device and one of the SCXI modules The address switch settings do not matter when the SCXI 2400 is disabled however the chassis address may so refer to your SCXI Chassis User Manual Figure 2 1 shows some examples of baud rates and settings Table 2 1 SCXI 2400 Baud Rate Settings Baud Rate Switch 12 Switch 11 Switch 10 Switch 9 300 bps Off Off Off Off 600 bps Off Off Off
5. SCXI TM 2400 User Manual Serial Interface Module June 1996 Edition Part Number 321231A 01 Copyright 1996 National Instruments Corporation All Rights Reserved 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 VISA visa support natinst com Lookout lookout support natinst com E mail info natinst com FTP Site ftp natinst com Web Address http www natinst com BBS United States 512 794 5422 or 800 327 3077 BBS United Kingdom 01635 551422 BBS France 1 48 65 15 59 512 418 1111 Tel 512 795 8248 Fax 512 794 5678 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 Internet Support Bulletin Board Support FaxBack Support Telephone Support U S Intern
6. Software 1 2 Optional Equipment 1 4 Unpacking 1 4 Chapter 2 Configuration and Installation Module Configuration 2 1 HDLC Address Selection 2 1 Baud Rate Selection 2 1 Hardware Installation 2 3 Cable Installation 2 4 Parallel Port Cable 2 4 Serial Port Cable 2 4 RS 232 Cable 2 5 RS 485 Cable 2 6 Indicator Lights 2 7 Append
7. in any way Do not install a damaged module into your SCXI chassis Never touch the exposed pins of connectors National Instruments Corporation 2 1 SCXI 2400 User Manual Configuration and Installation Chapter 2 This chapter describes how to configure the SCXI 2400 switches and how to install the SCXI 2400 into the SCXI chassis Module Configuration Module configuration involves selecting an HDLC high level data link control address for RS 485 and a baud rate HDLC Address Selection Unless you are using multiple chassis and need to configure one or more serial ports for a different HDLC address you can leave your SCXI 2400 with the factory default HDLC address of 1 If you are controlling your chassis via the RS 485 serial port on the SCXI 2400 you cannot use RS 232 to control more than one chassis from a single serial port you must specify the HDLC address of the SCXI 2400 on the serial port You must configure all the serial ports on the same network for different addresses Before setting the HDLC address of the SCXI 2400 set the address of your chassis to 0 The SCXI 100 X have the factory default chassis address setting of 0 See your chassis user manual for instructions on setting its address Set the HDLC address of the serial port with switches 1 through 8 on the front panel of the SCXI 2400 to select an HDLC address from 1 to 254 addresses 0 and 255 are reserved
8. module and adapter board must be firmly engaged however do not force the module into place 4 Screw the front mounting panel of the SCXI 2400 to the top and bottom threaded strips of your SCXI chassis ON 5 12 11 10 9 8 7 6 1 4 3 2 5 12 11 10 9 8 7 6 1 4 3 2 5 12 11 10 9 8 7 6 1 4 3 2 ADDRESS BAUD ADDRESS BAUD ADDRESS BAUD ON ON Module Default Address 1 Baud 9600 bps Address 65 Baud 57 6 kbps Disabled SCXI 2400 Chapter 2 Con guration and Installation SCXI 2400 User Manual 2 4 National Instruments Corporation 5 If you will be using an SCXI 1200 module or the RS 485 connections install the SCXI 2400 adapter board by performing the following steps a Plug the 50 pin connector of the adapter board into the 50 pin connector at the rear of the SCXI 2400 module b Secure the adapter board by screwing the two screws through the rear panel of the adapter board and into the threaded strips in the rear of the SCXI chassis 6 Install your cables See the Cable Installation section of this chapter for more information 7 Make sure you have installed and connected the module and cables properly Fill out the Hardware and Software Configuration Form in Appendix B Customer Communication 8 Turn on the SCXI chassis 9 Turn on the computer or reconnect it to your chassis The SCXI 24
9. of functions for using LabWindows CVI with National Instruments boards is included with your 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 has an extensive library of functions that you can call from your application programming environment These functions include routines for analog input Chapter 1 Introduction National Instruments Corporation 1 3 SCXI 2400 User Manual 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 also internally addresses many of the complex issues between the computer and the plug in board 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 Figure 1 1 The
10. pin connections to on your computer The DTR and RTS lines are always driven active by the SCXI 2400 Some computer serial ports may be disabled if their DSR and CTS lines are not active so you should connect these signals The SCXI 2400 ignores the control lines from the computer serial port so it is not necessary to connect them although connecting them will not adversely affect the system Table 2 2 RS 232 Signal Connections SCXI 2400 Connections Serial Port Pin Connections Pin Number Signal Name Signal Name Pin Number 9 Pin 25 Pin 14 Pin 1 No connect 2 RXD TXD 3 2 9 3 TXD RXD 2 3 1 4 DTR DSR 6 6 2 5 GND GND 5 7 13 14 6 No connect 7 RTS CTS 8 5 4 8 No connect 9 No connect Chapter 2 Con guration and Installation SCXI 2400 User Manual 2 6 National Instruments Corporation RS 485 Cable Use only an RS 232 or an RS 485 cable you cannot use both at the same time The RS 485 connector on the SCXI 2400 adapter board uses a screw terminal plug to accept wires from your RS 485 cable Use twisted pair cable to increase noise tolerance Make the network connections as given in Table 2 3 In addition terminate the differential pairs by adding termination resistors at the ends of the cable Terminate the cables with resistors that are the same value as the impedanc
11. s abuse misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Copyright 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 Portions copyright 1989 1996 Datalight Inc All rights reserved Trademarks ComponentWorks LabVIEW NI DAQ and SCXI TM 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 safeguar
12. 00 module is installed You are now ready to install and configure your software If you are using NI DAQ LabVIEW LabWindows CVI or ComponentWorks refer to the installation instructions in your software documentation to install and configure your software Cable Installation Parallel Port Cable If you are using an SCXI 1200 DAQ module install the SCXI 1200 in the slot adjacent to the SCXI 2400 and connect the 25 pin end of your parallel port cable to the parallel port connector on the DAQ module Then connect the 36 pin end of your parallel port cable to the parallel port connector on the back of the SCXI 2400 adapter board Serial Port Cable You can use the RS 232 port on your computer to control one chassis up to 100 ft or 2 500 pF of cable capacitance from your computer If your chassis is farther away or you are using multiple chassis you must use RS 485 Chapter 2 Con guration and Installation National Instruments Corporation 2 5 SCXI 2400 User Manual RS 232 Cable Use only an RS 232 or an RS 485 cable you cannot use both at the same time The RS 232 connector is the same as the 9 pin DSUB connector found on most computers Some computers use a 25 pin connector and NEC computers use a 14 pin connector Note You must use a null modem cable to connect your computer directly to your SCXI 2400 If you must make your own cable use Table 2 2 for the RS 232 connector pinout to determine the
13. EST indicator function of 2 7 to 2 8 troubleshooting 2 8 transfer characteristics A 1 troubleshooting with LED indicators table 2 8 to 2 9 TX indicator table 2 7
14. 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 B Customer Communication at the end of this manual National Instruments Corporation 1 1 SCXI 2400 User Manual Introduction Chapter 1 This chapter describes the SCXI 2400 lists what you need to get started with your SCXI 2400 the optional software the optional equipment and explains how to unpack the SCXI 2400 About the SCXI 2400 The SCXI 2400 is a module that controls the SCXI chassis with your computer s serial port The SCXI 2400 includes an RS 232 port for direct connection to the serial port of a PC and an RS 485 port for long distance multichassis system configuration The module can operate in any SCXI chassis Detailed specifications of the SCXI 2400 are listed in Appendix A Specifications What You Need to Get Started To set up and use your SCXI 2400 you will need the following items K SCXI 2400 module K SCXI 2400 User Manual K One of the following chassis and the SCXI Chassis User Manual SCXI 1000 SCXI 1000DC SCXI 1001 K One of the following cables RS 232 Type 5 null modem cable RS 485 4 w
15. Relationship between the Programming Environment NI DAQ and Your Hardware LabWindows CVI PC or Sun SPARCstation LabVIEW PC Macintosh or Sun SPARCstation Conventional Programming Environment PC Macintosh or Sun SPARCstation NI DAQ Driver Software DAQ or SCXI Hardware Personal Computer or Workstation Chapter 1 Introduction SCXI 2400 User Manual 1 4 National Instruments Corporation Optional Equipment Listed below is an optional accessory that works with your 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 IEEE 1284 7 in type C to type A parallel port cable DAQ device or SCXI DAQ module SCXI 1200 Unpacking Your SCXI 2400 module is shipped in an antistatic package to prevent electrostatic damage to the module Electrostatic discharge can damage several components on the module To avoid such damage in handling the module take the following precautions Ground yourself via a grounding strap or by holding a grounded object Touch the antistatic package to a metal part of your SCXI chassis before removing the module from the package Remove the module from the package and inspect the module for loose components or any other sign of damage Notify National Instruments if the module appears damaged
16. _ Programming language version __________________________________________________ Other boards in system _________________________________________________________ Base I O address of other boards _________________________________________________ DMA channels of other boards ___________________________________________________ Interrupt level of other boards ___________________________________________________ RS 232 or RS 485 _____________________________________________________________ Plug in serial port interface card make and model ___________________________________ Comm port number ____________________________________________________________ Base address of comm port ______________________________________________________ Comm port interrupt level _______________________________________________________ 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 SCXI TM 2400 User Manual Edition Date June 1996 Part Number 321231A 01 Please comment on the completeness clarity and organization of the manual _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ ___
17. __________________ National Instruments software product ___________________________ Version ____________ Configuration ___________________________________________________________________ The problem is __________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ List any error messages ___________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ The following steps reproduce the problem ____________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ SCXI 2400 Hardware and Software Configuration Form Record the settings and revisions of your hardware and software on th
18. __________________________ Mail to Technical Publications Fax to Technical Publications National Instruments Corporation National Instruments Corporation 6504 Bridge Point Parkway 512 794 5678 Austin TX 78730 5039 National Instruments Corporation G 1 SCXI 2400 User Manual Glossary ohms percent A amperes AC alternating current A D analog to digital baud rate expressed in bits per second is the signal rate over the serial port bps bits per second used to express baud rate C Celsius CTS clear to send signal D A digital to analog DAQ data acquisition DC direct current DSR data set ready signal DSUB D subminiature connector DTR data terminal ready signal Prefix Meaning Value m milli 10 3 k kilo 10 3 M mega 10 6 Glossary SCXI 2400 User Manual G 2 National Instruments Corporation EISA Extended Industry Standard Architecture F farads ft feet GND ground HDLC high level data link control hex hexadecimal Hz hertz in inches I O input output ISA Industry Standard Architecture LED light emitting diode MB megabytes of memory NC not connected signal ONLINE online LED PROG program LED RTS request to send signal RX receive LED RXD receive data signal TEST testing LED TX transmit LED TXD transmit data signal s seconds SCXI Sig
19. ____________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 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 ___________________________________________
20. ational Offices Important Information Warranty The SCXI 2400 is 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 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 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 E XCEPT AS SPECIFIED HEREIN N ATIONAL I NSTRUMENTS MAKES NO WARRANTIES EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY
21. ds 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 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 National Instruments Corporation v SCXI 2400 User Manual Table of Contents About This Manual Organization of This Manual vii Conventions Used in This Manual viii National Instruments Documentation ix Customer Communication x Chapter 1 Introduction About the SCXI 2400 1 1 What You Need to Get Started 1 1 Software Programming Choices 1 2 LabVIEW and LabWindows CVI Application Software 1 2 NI DAQ Driver
22. dy for normal operation PROG Program Lights when the SCXI 2400 firmware requires reprogramming TEST Test Lights when the chassis powers up or is reset Turns off after all self testing and self initialization are complete Chapter 2 Con guration and Installation SCXI 2400 User Manual 2 8 National Instruments Corporation When the SCXI 2400 is ready for normal operation and set for serial port control only the ONLINE LED will flash When the SCXI 2400 receives an initialization instruction from the serial port the ONLINE LED will remain lit Table 2 5 lists potential problems noted by your LEDs and possible solutions Table 2 5 SCXI 2400 Troubleshooting Problem Solution Power LED on chassis does not light Make sure the chassis is plugged in Make sure the power switch is on Make sure the chassis voltage selection is correct Check the fuse in the power entry module Return the chassis for servicing Power LED lights but TEST does not Check the chassis backplane fuses Return the chassis or SCXI 2400 for servicing PROG lights Upgrade the firmware on your SCXI 2400 Refer to the NI DAQ Configuration Utility for more details TEST and PROG flash simultaneously Check the switch settings TEST PROG and ONLINE flash simultaneously Return the SCXI 2400 for servicing Chapter 2 Con
23. e 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 ComponentWorks LabVIEW LabWindows CVI or NI DAQ version____________________ Baud rate switches on or off 12___ 11___ 10___ 9___ Baud___ Address switches on or off 8___ 7___ 6___ 5___ 4___ 3___ 2___ 1___ Address___ HDLC addresses and baud rates of other chassis _____________________________________ Chassis ______________________________________________________________________ Other modules and slots_________________________________________________________ Other Products Computer make and model ______________________________________________________ Microprocessor _______________________________________________________________ Clock frequency or speed _______________________________________________________ Type of video board installed ____________________________________________________ Operating system _____________________________________________________________ Operating system version _______________________________________________________ Programming language ________________________________________________________
24. e of the cable For most twisted pair cables 120 is sufficient On the pair of wires that is cabled to the TX and TX pins of the computer install a resistor between the RX and RX pins on the last SCXI 2400 in the chain On the pair of wires that is cabled to the RX and RX pins of the computer install a resistor between the TX and TX pins on the last SCXI 2400 in the chain and install a resistor between RX and RX on the computer s serial port Figure 2 2 shows a diagram of a two chassis network Figure 2 2 RS 485 Connections for Two Chassis with SCXI 2400 Modules Table 2 3 RS 485 Signal Connections Computer RS 485 Port Signal SCXI 2400 Signal TX RX TX RX RX TX RX TX Last SCXI Chassis with SCXI 2400 First SCXI Chassis with SCXI 2400 Computer RS 485 Port TX TX RX RX TX TX RX RX TX TX RX RX R R R R Chapter 2 Con guration and Installation National Instruments Corporation 2 7 SCXI 2400 User Manual Clamp the ferrite around the RS 485 cable as close to the screw terminal plug as possible Secure the ferrite with electrical tape if necessary to keep the ferrite from sliding down the cable Government emissions regulations require that you use the ferrite Indicator Lights The SCXI 2000 has five lights that indicate the state of the SCXI 2400 in operation Table 2 4 lists these indicator lights and their functio
25. ength 2 500 pF capacitance 100 ft typ RS 485 connector or adapter board 4 pin screw terminal labeled on panel Max cable length 4 000 ft Parallel port connector 36 pin IEEE 1284 type C Digital I O Isolation RS 485 port 42 V Common mode transient suppression RS 485 port 750 V Transfer Characteristics Serial port Baud rates supported 300 600 1200 2400 4800 and 9600 bps 19 2 kbps 38 4 kbps 57 6 kbps Byte format 1 start bit 1 stop bit no parity 8 data bits Maximum data transfer rates are for a single chassis operating continuously with an SCXI 1200 For short duration acquisitions the chassis can buffer data at the maximum specified rates of the SCXI 1200 Appendix A Speci cations SCXI 2400 User Manual A 2 National Instruments Corporation Physical Dimensions 3 0 by 17 2 by 20 3 cm 1 2 by 6 8 by 8 0 in Environment Operating temperature 0 to 50 C Storage temperature 55 to 150 C Relative humidity 5 to 90 noncondensing Table A 1 Max Data Transfer Rates S s Baud Rate Operating System Windows 95 Windows 3 1 57 6 kbps 1 500 1 500
26. erally 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 filenames and extensions and for statements and comments taken from program code SCXIbus Refers to the backplane in the chassis A signal on the backplane is referred to as the SCXIbus lt signal name gt line or signal The SCXIbus descriptor may be omitted when the meaning is clear Descriptions of all SCXIbus signals are in Chapter 3 Signal Connections Slot 0 Refers to the power supply and control circuitry in the SCXI chassis Abbreviations acronyms metric prefixes mnemonics symbols and terms are listed in the Glossary About This Manual National Instruments Corporation ix SCXI 2400 User Manual National Instruments Documentation The SCXI 2400 User Manual is one piece of the documentation set for your DAQ system You could have any of several types of manuals depending on the hardware and software in your system Use the manuals you have as follows Getting Started with SCXI This is the first manual you should read It gives an overview of the SCXI system and contains the most commonly needed information for the modules chassis and software Your SCXI hardware user manuals Read these manuals next for detailed
27. guration and Installation National Instruments Corporation 2 9 SCXI 2400 User Manual ONLINE keeps flashing even after you have started your DAQ application Check that the RX LED flashes when you use your host serial port If not then check the cable and your serial port configuration on the computer If the RX LED flashes but TX does not make sure that the address switches and baud rate switches match the configuration in the NI DAQ Configuration Utility for the SCXI 2400 Check the cable for bad connections If you are using a long cable use a slower baud rate on the system If you are using RS 485 make sure the serial port is configured to communicate using 4 wire mode TEST PROG and ONLINE flash in sequence but nothing works Check your cables If you want the SCXI 2400 disabled check your chassis address settings and your configuration in the NI DAQ Configuration Utility If you want to use the SCXI 2400 check the switch setting Table 2 5 SCXI 2400 Troubleshooting Continued Problem Solution National Instruments Corporation A 1 SCXI 2400 User Manual Specifications Appendix A This appendix lists the specifications for the SCXI 2400 These specifications are typical at 25 C unless otherwise noted Connectors RS 232 connector 9 pin male DSUB AT pinout Max cable l
28. his Manual The SCXI 2400 User Manual is organized as follows Chapter 1 Introduction describes the SCXI 2400 lists what you need to get started with your SCXI 2400 the optional software the optional equipment and explains how to unpack the SCXI 2400 Chapter 2 Configuration and Installation describes how to configure the SCXI 2400 switches and how to install the SCXI 2400 into the SCXI chassis Appendix A Specifications lists the specifications for the SCXI 2400 Appendix B 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 metric prefixes mnemonics symbols and terms The Index contains an alphabetical list of key terms and topics in this manual including the page where you can find each one About This Manual SCXI 2400 User Manual viii National Instruments Corporation Conventions Used in This Manual The following conventions are used in this manual bold Bold text denotes LEDs bold italic Bold italic text denotes a note caution or warning italic Italic text denotes emphasis a cross reference or an introduction to a key concept monospace Denotes text or characters that are to be lit
29. 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 documentation sets and the NI DAQ documentation After you set up your hardware system use either the application software LabVIEW or LabWindows CVI 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 installation guides or 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 Read these manuals for maintenance information on the chassis and installation instructions About This Manual SCXI 2400 User Manual x National Instruments Corporation Customer Communication National
30. ire cable and ferrite K Your computer with an RS 232 or RS 485 port Chapter 1 Introduction SCXI 2400 User Manual 1 2 National Instruments Corporation K One of the following software packages and documentation LabVIEW for Windows LabWindows CVI for Windows NI DAQ for PC compatibles Software Programming Choices There are several options to choose from when programming your National Instruments plug in 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 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 boards is included with LabVIEW The LabVIEW Data Acquisition VI Library is functionally equivalent to the NI DAQ software LabWindows CVI features interactive graphics and a state of the art user interface and uses the ANSI standard C programming language The LabWindows CVI Data Acquisition Library a series
31. ix A Specifications Table of Contents SCXI 2400 User Manual vi National Instruments Corporation Appendix B Customer Communication Glossary Index Figures Figure 1 1 The Relationship between the Programming Environment NI DAQ and Your Hardware 1 3 Figure 2 1 Baud Rate and Address Setting Examples 2 3 Figure 2 2 RS 485 Connections for Two Chassis with SCXI 2400 Modules 2 6 Tables Table 2 1 SCXI 2400 Baud Rate Settings 2 2 Table 2 2 RS 232 Signal Connections 2 5 Table 2 3 RS 485 Signal Connections 2 6 Table 2 4 Front Panel LED Indicators 2 7 Table 2 5 SCXI 2400 Troubleshooting 2 8 National Instruments Corporation vii SCXI 2400 User Manual About This Manual This manual describes the electrical and mechanical aspects of the SCXI 2400 and contains information concerning its installation and operation With the SCXI 2400 serial interface module you can control your SCXI chassis through the RS 232 or RS 485 port on your computer Organization of T
32. nal Conditioning eXtensions for Instrumentation TTL transistor transistor logic Glossary National Instruments Corporation G 3 SCXI 2400 User Manual V volts VI virtual instrument National Instruments Corporation I 1 SCXI 2400 User Manual Index B baud rate selection 2 1 to 2 3 disabling SCXI 2400 without removing from chassis 2 2 settings for baud rate table 2 1 to 2 3 switch settings figure 2 3 C cables 2 4 to 2 7 parallel port cable 2 4 RS 232 cable 2 5 RS 485 cable 2 6 to 2 7 specifications A 1 configuration See also hardware installation baud rate selection 2 1 to 2 3 settings for baud rate table 2 1 to 2 3 switch settings figure 2 3 HDLC address selection 2 1 customer communication x xi B 1 to B 2 D digital I O specifications A 1 documentation conventions used in manual viii National Instruments documentation ix organization of manual vii E electronic technical support B 1 to B 2 environment specifications A 2 equipment optional 1 4 F fax and telephone support B 2 H hardware installation 2 3 to 2 9 cables 2 4 to 2 7 parallel port cable 2 4 RS 232 cable 2 5 RS 485 cable 2 6 to 2 7 indicator lights and troubleshooting 2 7 to 2 9 procedure for 2 3 to 2 4 unpacking the SCXI 2400 1 4 hardware requirements for getting started 1 1 to 1 2 HDLC address selection 2 1 I indicato
33. ns Listed below are the possible indications given by these LEDs When you first turn on your chassis both the power LED on the chassis and the TEST LED should light If the SCXI 2400 needs to be reprogrammed the TEST LED will turn off and the PROG LED will light and remain lit until the firmware on the SCXI 2400 is reinstalled Consult your software manual for the procedure for firmware upgrades If the power on test finds something wrong with the SCXI 2400 the ONLINE PROG and TEST LEDs will all flash on and off While the SCXI 2400 is waiting for synchronization with the NI DAQ driver on the host computer the ONLINE LED flashes slowly The LED lights and stops flashing when the SCXI 2400 and the host computer are synchronized If your switch settings are invalid only the PROG and TEST LEDs will flash on and off together If the chassis is ready for operation and the SCXI 2400 is disabled the PROG TEST and ONLINE LEDs will flash in sequence Table 2 4 Front Panel LED Indicators LED Name Function TX Transmit Flashes when the SCXI 2400 is speaking to the host computer RX Receive Flashes when the host computer is speaking ONLINE Online Flashes slowly while waiting for synchronization with the host computer then lights and stops flashing when the chassis is rea
34. pport natinst com Lookout lookout 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 in your country contact the source from which you purchased your software to obtain support Telephone Fax Australia 03 9 879 9422 03 9 879 9179 Austria 0662 45 79 90 0 0662 45 79 90 19 Belgium 02 757 00 20 02 757 03 11 Canada Ontario 519 622 9310 Canada Quebec 514 694 8521 514 694 4399 Denmark 45 76 26 00 45 76 26 02 Finland 90 527 2321 90 502 2930 France 1 48 14 24 24 1 48 14 24 14 Germany 089 741 31 30 089 714 60 35 Hong Kong 2645 3186 2686 8505 Italy 02 413091 02 41309215 Japan 03 5472 2970 03 5472 2977 Korea 02 596 7456 02 596 7455 Mexico 95 800 010 0793 5 520 3282 Netherlands 0348 433466 0348 430673 Norway 32 84 84 00 32 84 86 00 Singapore 2265886 2265887 Spain 91 640 0085 91 640 0533 Sweden 08 730 49 70 08 730 43 70 Switzerland 056 200 51 51 056 200 51 55 Taiwan 02 377 1200 02 737 4644 U K 01635 523545 01635 523154 FaxBack Support E Mail Support currently U S only 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 befo
35. r lights front panel LED indicators table 2 7 function of indicators 2 7 to 2 8 problems indicated by table 2 8 to 2 9 installation See hardware installation L LabVIEW and LabWindows CVI application software 1 2 LEDs See indicator lights M manual See documentation Index SCXI 2400 User Manual I 2 National Instruments Corporation N NI DAQ driver software 1 3 O ONLINE indicator function of 2 7 2 8 troubleshooting table 2 9 P parallel port cable 2 4 physical specifications A 2 PROG indicator function of 2 7 to 2 8 troubleshooting table 2 8 to 2 9 R RS 232 cable installation 2 5 signal connections table 2 5 RS 485 cable connections for two chassis figure 2 6 installation 2 6 signal connections table 2 6 RX indicator table 2 7 S SCXI 2400 disabling without removing from chassis 2 2 optional equipment 1 4 overview 1 1 requirements for getting started 1 1 to 1 2 serial port cables 2 4 RS 232 2 5 RS 485 2 6 software programming choices 1 2 to 1 3 signal connections RS 232 cable table 2 5 RS 485 cable table 2 6 software programming choices 1 2 to 1 3 LabVIEW and LabWindows CVI application software 1 2 NI DAQ driver software 1 3 specifications A 1 to A 2 connectors A 1 digital I O A 1 environment A 2 physical A 2 transfer characteristics A 1 T technical support B 1 to B 2 T
36. re 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 _________________________________________________
37. vers 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 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 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 Bulletin Board Support FTP 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 512 418 1111 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 LabVIEW lv support natinst com DAQ daq support natinst com HiQ hiq support natinst com VXI vxi support natinst com VISA visa support natinst com LabWindows lw su
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