using the ex1200-7600
Contents
1. 23 conversion and 4 scaling SENSE RET BE GND C 2 FIGURE 2 3 INTERNAL CONNECTIVITY OF THE FRONT PANEL PINS Note that there are two RES1A and AGND terminals These connections are provided to facilitate the use of 4 wire resistance simulations For example to simulate a 4 wire RTD these terminals act as the excitation and sense terminals Electrically both RES1A and AGD terminals are parallel and therefore interchangeable While using a 2 wire resistor these terminals can be shorted externally to provide lower contact resistance 16 EX1200 7600 Using the Instrument www vtiinstruments com BPL_INSFAIL BEHAVIOR The EX1200 platform backplane has a BPL_INSFAIL line that indicates to all modules that a severe failure has occurred When this line is asserted all of the relays on the EX1200 7600 will be opened leaving the circuit open EX1200 7600 Using the Instrument 17 VTI Instruments Corp 18 EX1200 7600 Using the Instrument www vtiinstruments com SECTION 3 PROGRAMMING THE INSTRUMENT INTRODUCTION This section provides programming examples for the EX1200 7600 Additional information can be found in the driver help file If the instrument will be used on a Linux system a chm viewer must be installed on the host PC examples of these programs can be found at the following URL http www linux com news software applications 8209 chm vi2. C Prior to using the EX1200 7600 an instrument driver connection must be made to the EX1200 7600 Once a connection is made using the Initialize call the user can execute their test code Before the program exits the user should release the resources using the Close call Users familiar with other VTI Instrument Drivers for the EX1200 series should find this driver is very similar to ones they have used before timport IviDriverTypeLib dll no namespace import VTEXVarRes dll no namespace abe mara yf CoInitialize NULL start COM layer try catch so driver not found situations are properly handled xy 4 IVTEXVarResPtr varres uuidof VTEXVarRes try second error layer for failed initialize using an empty options string here see Option Strings below for more infomration also using Reset bit to get a clean init varres meea IL ac va Can eere ss 1L 0 4 55 9 NSR VARIANTE VARIANT TRUE test code goes her varres Close catch com error amp e MessageBox NULL e Description e ErrorMessage MB ICONERROR POCA eh wore handle errors here depending on needs Option Strings The VTEX drivers provide option strings that can be used when Initializing an instrument The option string values exist to change the behavior of the driver The following options strings are available on VTI IVI drivers e Simulate Allows the user to run a program
3. Service should only be performed by qualified personnel Disconnect all power before servicing TERMS AND SYMBOLS These terms may appear in this manual WARNING Indicates that a procedure or condition may cause bodily injury or death CAUTION Indicates that a procedure or condition could possibly cause damage to equipment or loss of data These symbols may appear on the product ATTENTION Important safety instructions Frame or chassis ground Indicates that the product was manufactured after August 13 2005 This mark is placed in accordance with EN 50419 Marking of electrical and electronic equipment in accordance with Article 11 2 of Directive 2002 96 EC WEEE End of life product can be returned to VTI by obtaining an RMA number Fees for take back and recycling will apply if not prohibited by national law Pt gt WARNINGS Follow these precautions to avoid injury or damage to the product Use Proper Power Cord To avoid hazard only use the power cord specified for this product Use Proper Power Source To avoid electrical overload electric shock or fire hazard do not use a power source that applies other than the specified voltage The mains outlet that is used to power the equipment must be within 3 meters of the device and shall be easily accessible EX1200 7600 Preface 5 VTI Instruments Corp WARNINGS CONT Avoid Electric Shock Ground the Product Operating Conditions Improper Use AN To av
4. fxn LXI Synchronization MAC Address 00 0D 3F 01 0A FA 10 20 11 158 255 255 0 0 2 Blink LAN Indicator ing TCPIP 10 20 11 158 INSTR 1 f 3 Network Configuration 1D LXI Identification Firmware Version Change Password JEEE 1588 Time E3 Upgrade 6 Reset EN Reboot FIGURE 4 2 EX1200 MAIN WEB PAGE The Index is accessible from any other instrument page by clicking on the EX1200 web page header The EX1200 Command Menu is displayed on the left hand side of every internal web page The entries on the command menu represent three types of pages Status This type of page performs no action and accepts no entries It provides operational status and information only The Index page is an example of a status page Action This type of page initiates a command on the instrument but does not involve parameter entry The Reboot page is an example of an action page Entry This type of page displays and accepts changes to the configuration of the instrument The Time Configuration page is an example of an entry page 28 EX1200 7600 SFP Operation www vtiinstruments com Use of the entry type web pages in the EX1200 are governed by a common set of operational characteristics e Pages initially load with the currently entered selections displayed e Each page contains a Submit button to accept newly entered changes Leaving a page before submitting any
5. 5 V then the voltage across the resistor load is 100 V The maximum voltage reading is 200 V The J Sense Out signal provides an indication of the current across the programmed resistance The relationship between J Sense Out and the current across the resistor load is determined by using the following equation 100 x I Sense Out Current across the resistor load in milliamps For example if J Sense Out reads 2 5 V then the current across the resistor load is 250 mA The maximum current reading is 500 mA 34 EX1200 7600 Theory of Operation www vtiinstruments com INDEX A ACCUTACY proses RR 12 B BPE INSFATL line uni 17 C ClOSIDg 5 eee o RR E REN RERO ERR tates 20 connector pin signal assignment esee 15 signal pin definitions eese 16 cooling current scaling D driver interfaces iere succes shenesboueodesvonnsnestoubutestaneucessoudicossenents 24 F TarEsate odes aca AT ER osov 22 Over Currents ne ome io 22 Over T emperatut iex eee eee e ae ee 22 OVeEVOItage sss oer IHR RESPIRO dete NER e 22 fault condition 49 A tees emite eo ee a EISi 9 firmware Version open 28 I IEEE 1588 Mie imita 28 index WED DAge ee nene tente dase RR EUER a P are iEneas 28 EPA AP 20 IP address taria aa aora POS 28 L LAN Instrument Connection and Upgrade utility 27 LInC U sy See LAN Instrument Connection and Upgrade TEXT C
6. Ex7000 583670 ex 583670 local 3 9 2 10 1 4 83 EX2500A 125294 EX2500A 646864 local 2 1 0 10 1 4 23 EX1629 119639 10 1 4 115 1 6 0 10 1 4 115 Found 7 devices i FIGURE 4 1 LINC U DISCOVERY TAB WITH AN EX1268 SELECTED Alternatively the EX1200 may also be discovered using Internet Explorer s Bonjour for Windows plug in by entering the mainframe s IP address into the address bar of any web browser to view the embedded web page or using VXI 11 For more information on discovery methods refer to the EX1200 Series User s Manual P N 82 0127 000 EX1200 7600 SFP Operation 27 VTI Instruments Corp GENERAL WEB PAGE OPERATION When initial connection is made to the EX1200 the instrument home page Index appears see This page displays instrument specific information including Model Manufacturer Serial Number Description LXI Class LXI Version Hostname MAC Address IP Address Netmask Instrument Address String Firmware Version IEEE 1588 Time WAT Iistrtnisnes Corporation 5 200 index Windows Internet EpPIorer y e E http 10 20 11 158 cai binindex co v e Search Al fr Favorites FEE VT Instruments Corporation EX1200 Index th Tools EX1 200 Index Instruments um Index LES EXER Manufacturer VTI Instruments Corporation Em Soft Front Panel Serial Number 122090 Description EX1266 122090 LXI Class A 6 Time Configuration BET a ed 10 20 11 158
7. changes has the effect of canceling the changes leaving the instrument in its original state e Navigation through a parameter screen is done with the Tab key The Enter key has the same function as clicking the Submit button and cannot be used for navigation Notes on Web Page Use If a window needs to be resized this should be done when the window opens Resizing requires a refresh which causes the current state to be lost VTI Instruments Logo The VTI Instruments logo that appears on the upper left of all EX1200 web pages is a link to the VTI Instruments corporate website http www vtiinstruments com The remainder of this discussion will focus on the EX1200 7600 soft front panel For more information on other EX1200 soft front panel elements please refer to the EX1200 Series User s Manual EX1200 7600 SOFT FRONT PANEL To navigate to the EX1200 7600 soft front panel click on Soft Front Panel in the Command Menu see Figure 4 3 Next select ex1200 7600 Variable Resistance from the list of cards installed in the EX1200 EFI Ins nuisnts Corporation tes 200 Soi ron Panel Windows Interner Exponer 69 Hi http 10 20 11 158 ca bin sFp col EIIE dip Favorites Bl VTI Instruments Corporation EX1200 Soft Front Panel mmm m EX1200 soft Front Panel Instruments id index Soft Front Panels Slot 3 ex1200 7600 Variable Resistance SFP Soft Front Panel Slo
8. e AR MW 8 ohm A 16 ohm e DO 00 E 32 ohm ov A 64 ohm A 128 ohms N 256 ohm E A 512 ohms 1024 ohms A x y 2 2048 ohm o 4096 ohms 3 A 8192 ohm 16 384 Kohm x N 32 768 Kohm x 65 536 Kohm NN x nN 131 072 Kohm 9 x 262 144 Kohm NS 524 288 Kohm y v SENSE OUT A 1 048576 Mohm SENSE RET 0 15 ohm 0 2 ohm SENSE OUT SENSE RET AGND FIGURE 1 1 LOGICAL BLOCK DIAGRAM 10 EX 1200 7600 Introduction www vtiinstruments com EX1200 7600 SPECIFICATIONS MODEL TYPE Programmable resistor load CHANNELS 1 SWITCHING TIME lt 5 ms RATED SWITCH OPERATIONS Mechanical 5x 10 Electrical 1 x 10 full load OVER TEMPERATURE PROTECTION PCB surface temperature 102 C 215 6 F MAXIMUM SWITCHING VOLTAGE 200 V ac rms MAXIMUM SWITCHING CURRENT 0 5A MAXIMUM SWITCHING CARRY POWER 5W POWER CONSUMPTION 3 3 V 0 129 A 5V 0 0041 A add 24 mA for each relay closure 24V 0 2 A maximum value RESISTOR PERFORMANCE VOLTAGE OUTPUT RANGE GAIN 40 1 1 full scale CURRENT OUTPUT RANGE GAIN 100 1 1 full scale SETTINGS ACCURACY 0 5 60 0 0 15 Q 60 1 1 499 999 O 0 25 of programmed value 1 499 999 1 2 097 152 6 Q Not specified MINIMUM INCREMENT RESOLUTION 0 10 MAT
9. ING CONNECTOR VTI Part Number 27 0076 015 Manufacturer Part Number Positronic HDC15F20000 CONNECTOR BACKSHELL VTI Part Number 27 0086 015 Manufacturer Part Number Amp 5 747099 1 EX1200 7600 Introduction 11 VTI Instruments Corp EXPLANATION OF SPECIFICATIONS This section provides explanatory notes to certain elements of the EX1200 7600 specification that may be misunderstood Switching Time This specification defines the amount of time needed for the resistance value to settle to the commanded value The resistance value may increase or decrease during this time If the connected external equipment is sensitive to these this variance in resistance it may be necessary to take any needed precautions such as connecting an external capacitor to reduce the effect of the step changes Setting Accuracy The accuracy of the EX1200 7600 is dependent on the amount of resistance that is programmed The specification indicates the accuracy for each of three ranges of resistance Note that although the EX1200 7600 can be set to values above 1 499 999 2 the accuracy for these loads is not specified 12 EX1200 7600 Introduction www vtiinstruments com SECTION 2 USING THE INSTRUMENT UNPACKING When an EX1200 7600 is unpacked from its shipping carton the contents should include the following items An EX1200 7600 LXI Quick Start Guide EX1200 7600 User s Manual this manual EX1200 7600 IVI Lin
10. IVI standard Provides useful functionality not specific to this driver such as Reset 24 EX1200 7600 Programming the Instrument www vtlinstruments com APPLICATION EXAMPLE This example simulates PT100 RTD using EX1200 7600 The temperature range is simulated from 200 C to 850 C A RID SET OKO TU SED C520 O6 00A 2 Cis EP BOR CAME include stdafx h using lt mscorlib dll gt timport IviDriverTypeLib dll no namespace import VTEXVarRes dll no namespace using namespace System double cons double cons START TEMP 200 starting temperaure rang END TEMP 850 ending temperature rang ci Xni Ave 3 908 oo LO Oi sine 3 2 RTD material constant Bj e 5 775 PONGO 07 mic 3 p RTD meterial constant Ro 100 Temperature at 0 C double cons double cons double cons abe EnaA ma i COA N U Sita cea SOMA We want to instantiate a pointer to the driver in a try catch block so that we fail properly if the driver is not found in the COM registry ley IVTEXVarResPtr VarRes uuidof VTEXVarRes We want to do the Initialization a try catch block so that our test code doesn t run if we fail to initialize try double temperature std cout lt lt RTD Simulation using EX1200 7600 programmable ciiam clc ases cies Telit We chose to give the driver an empty options string You may want to give your driver opt
11. LASS eerte o eter eee PRENNE ERA 28 Ibdbic m M 28 M MALIN CODDeCLOE dad monitor and control webpage O A O 23 OPHON SHIN EP 20 P plug in module installation eec RR Re e power consumption programming iiec nce ee eR ESSE R ASSERERE AE uhr failcSAfe idas initializing odometers TESISLANCE py ona nose a hr CE SA ENEE SEATA BBE see YR ARTO 9e te E NE S SFP any failsafe condition indicator sss 31 backplane failsafe indicator ee 31 backplane line SOUICO ierra eet tu erento 31 failure indicator LEDS sese 30 monitor and control page 30 31 output source field 30 OverCurrent indicator 30 OverTemperature indicator eese 31 OverVoltage indicator eene 30 31 resistance field iaces i het aedis 30 soft front panel specifications 11 12 Switching M soe ete ala ep de ree 12 T theory of ODeratiOn us e teret eet eR Prot EE Peers 33 U sing the drive see ede O 19 V voltage Scaling zi esse ee Pete ETE dl oto en 34 W EX1200 7600 Index 35
12. PEN 7 V SENSE OUT 8 I SENSE OUT 9 AGND 10 AGND m UNUSED 12 UNUSED 13 FP_GND 14 SENSE_RET 15 SENSE_RET TABLE 2 1 EX1200 7600 CONNECTOR PIN SIGNAL ASSIGNMENT EX1200 7600 Using the Instrument 15 VTI Instruments Corp The purpose of each signal is defined in Table 2 2 Signal Description RES1A Input at the resistor terminals GND C The chassis ground This pin is usually connected to cable shield AGND The analog ground This pin can be used when the user s signal has its own ground separate from chassis ground mentioned above FP OPEN A Low signal at this pin opens up all the relays and the resistance path is open when FP OPEN is restored high it return back to the previous set relay driver status FP_GND Ground pin for the FP_OPEN signal V_SENSE_OUT The voltage sense line This pin provides access to the scaled down input voltage of RES1A The resistance is scaled down 40 1 1 of the full scale setting I SENSE OUT The current sense line This pin provides access to the scaled down input current of RES1A The resistance is scaled down 100 1 1 of the full scale setting SENSE RET The return path for voltage current sense lines TABLE 2 2 SIGNAL PIN DEFINITIONS RES1A RES1A E A Program Control AGND AGND V SENSE OUT 40 Voltage scaling 100 I to V I SENSE OUT
13. VTEXVarResSwitchModeBreakBeforeMake The resistance value to 1k Ohm VarRes gt Channels gt Item CH1 gt Output 1000 0 Enable relays of a channel VarRes gt Channels gt Item CH1 gt Enabled true Check the over current state if VarRes Channels Item CH1 OverCurrent The channel is in an over current state so action should be taken here Configure to assert a backplane trigger line BPLO in any error condition VarRes gt Trigger gt BackplaneOutput VTEXVarResBackplaneTriggerBPL0 VarRes gt Trigger gt OutputSource VTEXVarResOutputSourceAny Fail safe The EX1200 7600 has several fail safe modes Backplane using BPL_INSFAIL OverVoltage using the onboard voltage sensor OverCurrent using the onboard current sensor and OverTemperature using a collection of six thermistors mounted on the board Each of these can be checked individually or can be programmatically routed to a backplane line to signal other devices when a fail safe condition occurs Once a fail safe condition has occurred it is latched Fail safe conditions can only be cleared by calling the EX1200 7600 s Reset function Note that for backplane and temperature fail safe conditions to be cleared when Reset is called the user must also remove the stimulus If the stimulus is still present the condition is immediately re asserted For voltage and current fail safe cond
14. VTI Instruments Cleveland Instrument Division 5425 Warner Road Suite 13 Valley View OH 44125 Phone 216 447 8950 Fax 216 447 8951 VTI Instruments Lake Stevens Instrument Division 3216 Wetmore Avenue Suite 1 Everett WA 98201 Phone 949 955 1894 Fax 949 955 3041 VTI Instruments Pvt Ltd Bangalore Instrument Division 642 80 Feet Road Koramangala IV Block Bangalore 560 034 India Phone 91 80 4040 7900 Phone 91 80 4162 0200 Fax 91 80 4170 0200 Technical Support Phone 949 955 1894 Fax 949 955 3041 E mail support vtiinstruments com Visit http www vtiinstruments com for worldwide support sites and service plan information EX1200 7600 Preface 7 VTI Instruments Corp 8 EX1200 7600 Preface www vtiinstruments com SECTION 1 INTRODUCTION OVERVIEW The EX1200 7600 is a single channel programmable resistor ladder It is designed for applications such as RTD or other resistance based sensor simulation process control ATE calibration and controlled loading of device under test DUT It contains internal high precision 5 W power resistors that are switched via electromechanical relays The EX1200 7600 is capable of producing any resistance value between 0 5 to 1 500 000 and can be adjusted in 0 1 increments via program commands It is designed for terminal voltages from 0 V to 200 V dc and for currents up to 0 5 A The EX1200 7600 is par
15. WU VTT Instruments EX1200 7600 5 W PROGRAMMABLE RESISTOR LADDER USER S MANUAL P N 82 0127 006 Released September 8 2010 VTI Instruments Corp 2031 Main Street Irvine CA 92614 6509 949 955 1894 VTI Instruments Corp TABLE OF CONTENTS TABLE OF Bro iugo ace P 2 A HO EE 4 AUNAT M eT ai R AAR PNE 4 Limitation of Warranty A e a E aE a e e a a a a n a nod en 4 Trademarks hegian e E Saal E ae ee ee a ee cea EEEE 4 Restricted Rights Legend ur ror etr re OR pU rer rsen PE Ren ros 4 GENERAL SAFETY INSTRUCTIONS ettet rete br ti EU err He testi asia 5 Terms and Symbols 32 2 ad e aL Sek Neh ora GU RUE O ee ee 5 W Arm esis aia oat tines Sep bud valo Bei ais Seine Blots A PERIERE 5 SUPPORT RESOURCES ote re RR RE OPEN TOR ERE RE REF EE ED Eger Os o EE Opere i n 7 SECTION E Me M 9 INTRODUCTION a T ODE 9 VET VIC ATTE 9 ITI 9 Fault Sensing poi ee PE Deitatis 9 EX1200 7600 Specifications 5 reet e hee OI epe b n ed perenne 11 Explanation of Specifications iiie tese mte eter rte RE pr Rt re rH Ee ere rte tein ein 12 SMWICOME TIMO pee dicte side 12 Setting Acc Vaca 12 SA O 13 USING THE INSTRUMENT 5 36 335 AO bate RIA ORO eei eta RR OUR ED EP EDAM 13 Unpacking u et n eU UE UR erba ite ctc eR A E Ens 13 Determine System Power Requirements eese ener nennen trennen ren
16. base unit Position the cover so that it fits into the module s slot groove Once the module is properly aligned push the module back and firmly insert it into the backplane connector See Figure 2 1 for guidance EX1200 7600 Using the Instrument 13 VTI Instruments Corp FIGURE 2 1 MODULE INSTALLATION EX1200 3048 USED AS EXAMPLE MAXIMIZING MEASUREMENT PERFORMANCE This section discusses tips and procedures that can help maximize the actual performance realized with the EX1200 7600 and aid the user in avoiding some common pitfalls associated with making measurements Warm Up Time The specified warm up time for an EX1200 system is 30 minutes If however the unit is being subjected to an ambient temperature change greater than 5 C extra stabilization time is recommended to achieve maximum performance 14 EX1200 7600 Using the Instrument www vtiinstruments com CONNECTOR PIN SIGNAL ASSIGNMENT The connector pins and their signal assignments are shown in Table 2 1 and Figure 2 1 below For mating connector and accessory information please see the EX7200 7600 Specifications DACC EX1200 a 7600 1U Orientation Pin 1 Pin 8 000000 00000 CONNECTOR DETAIL Pin 9 Pin 15 oov O 3U Orientation FIGURE 2 2 EX1200 7600 FRONT PANEL DETAIL 1 RESIA 2 RESIA 3 UNUSED 4 GND_C 5 UNUSED 6 FP_O
17. contract VTI specifically disclaims the implied warranties of merchantability and fitness for a particular purpose TRADEMARKS Java Runtime Environment are trademarks or registered trademarks of Sun Microsystems Inc or its subsidiaries in the United States and other countries LabVIEW and LabWindows CVI are trademarks of National Instruments Corporation Visual Basic Windows and Internet Explorer are registered trademarks of the Microsoft Corporation or its subsidiaries Linux is a registered trademark of the Linux Foundation IVITM is a trademark of the IVI Foundation Bonjour is a trademark of Apple Inc RESTRICTED RIGHTS LEGEND Use duplication or disclosure by the Government is subject to restrictions as set forth in subdivision b 3 11 of the Rights in Technical Data and Computer Software clause in DFARS 252 227 7013 VTI Instruments Corp 2031 Main Street Irvine CA 92614 6509 U S A 4 EX1200 7600 7600 Preface www vtiinstruments com GENERAL SAFETY INSTRUCTIONS Review the following safety precautions to avoid bodily injury and or damage to the product These precautions must be observed during all phases of operation or service of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product Note that this product contains no user serviceable parts or spare parts
18. ction populates a SAFEARRAY with the odometer counts for the relays specified as a comma separated list of relay names in BSTR Josie ic welays KIL 12 897 SAFEARRAY odoms NULL varres gt GetOdometers relays amp odoms varres Close catch com error amp e i Ses MessageBox NULL e Description e ErrorMessage MB ICONERROR JA handle errors here depending on needs DRIVER INTERFACES The following is a list of programmatic interfaces to the EX1200 7600 with a description of the functionality they provide Please refer to the help file installed with the driver for a programming reference that includes all methods with their parameters as well as all enumerations IVTEXVarRes Used to open and close connections to the instrument Also contains Failsafe information that is per card such as Temperature Channels Used to configure or query individual channel state such as resistance value relay switching mode or over voltage current status DriverOperation IVI standard Provides control over the manner in which the driver operates Identity IVI standard Provides detailed version information about the driver connected hardware and firmware versions Platform Used to Log driver function calls and to retrieve the serial number of the instrument Trigger Used to configure trigger condition and select a backplane trigger line to be asserted Utility
19. d this indicates that a failure condition has occurred Failures can be communicated by the EX1200 7600 to the EX1200 by configuring the Output Source and Backplane Lines fields Resistance Field The Resistance field is used to configure the resistance value of the desired load The EX1200 7600 can be set to a value between 0 5 and 1 499 999 O in 0 1 increments with specified accuracy The Enable slider allows the user to enable and disable the EX1200 7600 s resistance channels Note that the EX1200 7600 can be set to resistance values up to 2 097 152 6 O but the accuracy of the values above 1 499 999 Q are not specified Output Source The Output Source field specifies the output signal that will be used when an failure condition is detected When an Output Source is selected the signal is sent to the EX1200 backplane line indicated by the Backplane Line field e No Source Selected When selected this indicates that no output will be generated if a failure condition is met e OverVoltage Indicates that when an over voltage condition occurs that an output will be generated on the selected backplane line An overvoltage condition is defined as an input exceeding 200 V ac rms e OverCurrent Indicates that when an over current condition occurs that an output will be generated on the selected backplane line An overcurrent condition is defined as an input exceeding 0 5 A 30 EX1200 7600 SFP Operation www vtiinstr
20. ewers for linux RELATED SOFTWARE COMPONENTS IVI COM Driver IVI C Driver LabView Driver Linux C Driver USING THE DRIVER The EX1200 7600 may be used in a variety of environments including Visual Basic C C LabView VTI instruments provides a IVI C and IVI COM compliant driver as well as a shared object that can be used on Linux systems that comply with the Linux Standard Base Version 3 1 Here is how to use the driver in each environment 1 Visual Studio C import IviDriverTypeLib dll no namespace import VTEXVarRes dll no namespace 2 CH Add a reference to VTEXVarRes dll in the project Include the following at the top of any code file that will access the driver using VTI VTEXVarRes Interop 3 C C on Windows Link against VTEXVarRes lib and include VTEXVarRes h in the file 4 C on Linux Link against opt vti lib libvarres so and include all the headers in opt vti include in the source file 5 LabView Copy the driver package to the lt Labview gt instr lib directory and access all relevant VIs EX1200 7600 Programming the Instrument 19 VTI Instruments Corp USING THE EX1200 7600 INITIALIZING CLOSING THE INSTRUMENT Initialization The base interface of the EX1200 7600 IVI driver VTEXVarRes LibVarRes on Linux is used to open and close connections to the instrument as well as containing pointers to all other interfaces to access the functionality of the instrument
21. ions check the manual to see the available settings change the Instrument ID string accordingly VarRes SIME stell Gwe MIC wes 840 30 53b 453 NS RA ZROD RA ARAN BU le VarRes gt Channels gt Item CH1 gt Enabled true Enabling the channel for use VarRes gt Channels gt Item CH1 gt SwitchMode VTEXVarResSwitchModeBreakBeforeMake Break to high resistance before setting the resistance Std cout Enter the temperature value to be set 200 C to 959 C ove std cin gt gt temperature if temperature gt START_TEMP amp amp temperature lt END_TEMP Temperature to resistance as per Callendar Van Dusen equation double C temperature 0 4 183 pow 10 0F int JA ID VarRes gt Channels gt Item CH1 gt Output Ro 1 A temperature B pow temperature 2 C temperature 100 pow temperature 3 std cout lt lt Actual set Resistance VarRes gt Channels gt Item CH1 gt Output lt lt std endl Retrivers the acutal resistance from the device Close the initialized session VarRes gt Close catch _com_error amp e EX1200 7600 Programming the Instrument 25 VTI Instruments Corp MessageBox NULL MB_ICONERROR CECE e Description e ErrorMessage We put this here to catch any error the program generates Do something to intelligently deal with err
22. itions the condition will not recur until the Enabled state of the channel is set to True C using mscorlib dll timport IviDriverTypeLib dll no namespace import VTEXVarRes dll no namespace int main CoInitialize NULL start COM layer 22 EX1200 7600 Programming the Instrument www vtiinstruments com try catch so driver not found situations are properly handled try AC Dei IVTEXVarResPtr varres uuidof VTEXVarRes try second error layer for failed initialize Cenei check the manual for using an empty options string here available options strings GS OmU Sen Cpe Rescate meme A malas os Ironie abl 3t we Ware e810 dE 2 5155 9 NSR VARIANT TRUE VARIANT TRUI E BackplaneFailsafe will be true if the failsafe trigger has occurred since the last reset this trigger prevents damage to the card by locking open all relays under well defined conditions lik xtreme temperatures or excess voltage bool bpl fail varres gt BackplaneFailsafe VARIANT TRUE 1 depu sani d OverTempurate is a bitmask sensor on the board and is 1 if that sensor has gon last reset 0 otherwise int overtemp varres gt OverTemperature each bit represents a temp since th OVO ecce te varres gt Utility gt Reset It is possible for BackplaneFailsafe to remain true through a reset if the condition that caused a fai
23. iy 32 768 Kohm 65 536 Kohm za A 131 072 Kohm 262 144 Kohm b FIGURE 5 1 EX1200 7600 SCHEMATIC EX1200 7600 Theory of Operation 33 VTI Instruments Corp To enable the programmable load resistance K33 and K34 must be closed The module s resistance value is set by opening the relays corresponding to the resistors required to create the desired programmed value For example a programmed resistor value of 0 6 Q will result when K1 and K35 is opened and all other relays are closed Note this is due to a native 0 5 Q resistance Paralleled relays must be closed in order to ensure that the high tolerances of this module s resistance values are achieved For example if K1 K35 and K2 K36 are closed then K32 must be closed as well If K13 through K25 are closed then K26 must also be closed These paralleled relays are automatically closed by the driver After power up reset or after fault condition all relays on the EX1200 7600 are open A fault condition is defined as exceeding the maximum current maximum voltage or maximum temperature for this module The V Sense Out signal provides an indication of the voltage across the programmed resistance The relationship between V Sense Out and the voltage across the resistor load is determined by using the following equation 40 x V Sense Out Voltage across the resistor load in volts For example if V Sense Out reads 2
24. l no namespace tae meim 4 CoInitialize NULL start COM layer try catch so driver not found situations are properly handled try IVTI EXVarResPtr varres uuidof VTEXVarRes try second error layer for failed initialize using an empty options string here check the manual for available options strings algo siag Reset bilt t0 Get ACE imit 5f varressa miea we meer e SILO Al HSS 2 N SERVAR TAN RUE VARIANT_TRUE only channel on this device is CH1 IVTEXVarResChannelPtr chl varres gt Channels gt Item CH1 setting an output coerces it to the nearest possible value mili SP chi Enabled VARIANT TRU ea EX1200 7600 Programming the Instrument 21 VTI Instruments Corp fi rerrtieving atic will erbem its actual Siete alej double actual_output serue ovirati chipu varres Close Catch com error se MessageBox NULL e Description e ErrorMessage MB ICONERROR E cara eo i handle errors here depending on needs Configuring Channels and Backplane Trigger This example shows how to set the switch mode resistance and configure the backplane trigger This stimulates a 1 kQ resistance in BBM switching mode and raises a backplaneO line if any fault conditions voltage current temperature occur C The relay switch mode to BBM VarRes gt Channels gt Item CH1 gt SwitchMode
25. l to be specified Slots 2 Just slot 2 Slots 2 EX1200 3048 slot and card model Slotsz 2 3 Multiple slots InterchangeCheck Boolean option that enables disables IVI Interchangeability checking As implemented in the VTI IVI drivers values entered for this property have no effect RangeCheck Boolean option that enables or disables driver validation of user submitted values As implemented in the VTI IVI drivers validation of user inputs is always performed at the firmware level regardless of this property s value RecordCoercions Boolean option that enables driver recording of coercions As implemented in the VTI IVI drivers coercions are handled in the firmware and cannot be recorded BASIC OPERATION Resistance The EX1200 7600 has single channel that is capable of producing resistance values between 0 5 G to 1 499 999 in 0 1 increments with specified accuracy All relays will be opened unless the Enabled property of channel is set to true C This example covers the main functionality of the device setting a resistance to be used as a load Note that although resistance is set on a per channel basis the EX1200 7600 has only one channel CH1 Also note that the resistance should be set first then enabled This prevents enabling the channel with the default resistance enabled which is the maximum value using mscorlib dll timport IviDriverTypeLib dll no namespace import VTEXVarRes dl
26. lsafe continues to exist It will not reset to a usable state Une se dem Cle GO Sac 5 varres Close com error amp e MessageBox NULL MB ICONERROR e Description e ErrorMessage handle errors here depending on needs Odometers C The EX1200 7600 also offers a set of relay odometers that allows users to track relay wear This is made available programmatically via the driver using lt mscorlib dll gt import import int main 3 CO leales ONIL IviDriverTypeLib dll no namespace VTEXVarRes dll no namespace start COM layer try catch so driver not found situations are properly handled try IN AI EXVarResPtr varres uuidof VTEXVarRes try second error layer for failed initialize using an empty options string here check the manual for available options strings GM SONUS Reser loe o qee a CARE imit SA Vrae eis o Can ena IL ata aree e 9 10 IE 24 155 9 6 SiR VARIANT TRUE VARIANT TRUI LH lectromechanical relays dictate The physical properties of that they wear over time EX1200 7600 Programming the Instrument 23 VTI Instruments Corp k earen becoming less reliable and eventually unusable The odometer check is used to determin when the releys on the card are approaching end of life by keeping a count of switch events The GetOdometers fun
27. nen netten nennen 13 Plug in Module Installation 13 Maximizing Measurement Performance s eeeseseseeseeeeeeeeeeee enne enne enr en nent enns entente cnn nono nn entente ene 14 Wan Up Time eT 14 Connector Pin Signal Assignment sisser eeeeeeeeeeesceescesecesecsecesecsaecseecseseaeseaeeeeeseeesecssecsaecsaecsaecaeesaeseneseeeeeens 15 BPL INSFAIL Behavior e e acy He neal eU engin neg a koh ee eee A 17 SECTION 3 RC 19 PROGRAMMING THE INSTRUMENT cccsscsssssssssssessvssessncesssevssessesavssasssssssesssesessssasasasessueecasasesesessssasassseseesusscesenees 19 Introd ction A e Deren piene anii denen edie nan asso Dre nes 19 Related Software Components n m ettet pere qo Rt ERROR HEN oo re ie Gr e tenni 19 Using the Driver D 19 USING THE EX1200 70600 rite ette iii 20 Initializing Closing the Instrument eene nennen ener nete enne tenete ne trennen trennen nennen 20 Option Sten BS niece RN 20 Basic Operation ien Coen been bed eee ert cns 21 Driver nterfaCes eec ette ad e eee bo tete bee Eee Pete ree EEUU 24 APPLICATION EXAMPLE rne env D eO ROI Been ee ro pere Aaa E v k 25 SECTION A Messer EE 27 SEP OPERATION M 27 NS LET EE MM 27 General Web Page Operation eoe ee ertt grub eb Yap vede veep ve ee ee es ER ete eel 28 VTI In
28. oid electric shock or fire hazard do not operate this product with the covers removed Do not connect or disconnect any cable probes test leads etc while they are connected to a voltage source Remove all power and unplug unit before performing any service Service should only be performed by qualified personnel This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground To avoid injury electric shock or fire hazard Do not operate in wet or damp conditions Do not operate in an explosive atmosphere Operate or store only in specified temperature range Provide proper clearance for product ventilation to prevent overheating DO NOT operate if any damage to this product is suspected Product should be inspected or serviced only by qualified personnel The operator of this instrument is advised that if the equipment is used in a manner not specified in this manual the protection provided by the equipment may be impaired Conformity is checked by inspection EX1200 7600 Preface www vtiinstruments com SUPPORT RESOURCES Support resources for this product are available on the Internet and at VTI Instruments customer support centers VTI Instruments Corp E A _ World Headquarters VTI Instruments Corp CE 2031 Main Street V T ES Irvine CA 92614 6509 m Instruments Fax 949 955 3041
29. ors return 0 26 EX1200 7600 Programming the Instrument www vtiinstruments com SECTION 4 SFP OPERATION INTRODUCTION EX1200s offer an embedded web page which provides network configuration control time configuration and the ability to perform firmware upgrades To facilitate discovery of the mainframe VTI provides the LAN Instrument Connection and Upgrade LInC U utility on the VTI Instruments Corp Drivers and Product Manuals CD included with the EX1200 mainframe in the EX Platforms Requisites directory To open the embedded web page start the LInC U utility by navigating to Start Programs VTI Instruments Corporation LInC U Utility LInC U Utility Once the utility is run LInC U will scan the network to discover all LAN based VTI instruments Once the scan is complete the Discovery Devices tab will appear and show the instruments that were discovered as shown in Figure 4 1 To open the web page click on the hostname hyperlink in the Discover Devices tab The IP address of the EX1200 can also be viewed from this window as well as its firmware version SR CIT EIU Utility File Configure Help Discover Devices Firmware Drivers Hostname Version IP Address 124079 ex 124079 local 3 9 0 devel 10 1 4 88 EX1208 635240 ex 635240 local 3 9 0 devel 10 1 4 67 EX1266 125225 ex 125225 local 3 9 0 devel 10 1 4 4 EX1266 122749 amp x 122749 local 3 7 0 10 1 4 135
30. rsion 0 Connected an Internet g 8100 FIGURE 4 5 DEVICE INFORMATION WEB PAGE EX1200 7600 SFP Operation 31 VTI Instruments Corp 32 EX1200 7600 SFP Operation www vtiinstruments com SECTION 5 THEORY OF OPERATION INTRODUCTION This instrument contains internal high precision 5 W power resistors that are switched in and out via mechanical relays It is capable of producing any resistance value between 0 5 O to 1 499 999 and can adjusted in 0 1 increments via external commands Values above this up to 2 097 152 6 Q can be generated as well with an unspecified accuracy The EX1200 7600 is designed for terminal voltages from 0 V to 200 V dc and for currents up to 0 5 A RES1A ES 8 fey 0 1 ohm om Gen SEM E 0 2 ohm EM 0 4 ohm Ben Lem LEA Y 0 4 ohm SM 1 ohm Oey Ory Gen 9 2ohm 4 4 ohm VM TA 629 83 8ohm 6M 16 ohm 829 TV Era 01M 32 ohm 524 288 Kohm tA FA 64 ohm 128 ome 256 ome c 512 ome 1024 ohm 7 V SENSE OUT eM 1 048576 Mohm SOA SENSE_RET 0 15 ohm TEX EM 0 2 ohm SENSE OUT Ley 923 F SENSE RET 9M SM 2048 ohm 4096 ohm AGND 8x ZM 8192 ohm 16 384 Kohm O24 s
31. struments L0g0 neret ere ER EE rh pH NM Re ELE ERE E Lg eee ei Eee bere Ere as 29 EX1200 7600 Sott Front Panel iento een pedes 29 2 EX1200 7600 7600 Preface www vtiinstruments com Monitor and Contiol di tes 30 Failure Indicator EEDS ite ne due n eerie Hees VID TOR VI es ees eee 30 Resistance Biel A EE AAE AE RRR 30 Output SOUf Ce eerte d gr tein teet Une dete oto teen toe 30 Backplane Line SoUurce ie ee dh eee ect eii fece e eiecit e tete 31 Device Information Tab astros uec ues e EE RR 31 NN O PO R O 33 THEORY OF OPERATION escote e pere ripeto e EO re Fi re E o p ive eere eec ri ees 33 Introduction ust ede uidestrit a Poe Exi de o o oo oo se solo 33 SA acs sheusecssiesbasssacnsssesicecacisheuensasiesbasasacusavasicacacisbensecssas 35 EX1200 7600 Preface 3 VTI Instruments Corp CERTIFICATION VTI Instruments Corp VTI certifies that this product met its published specifications at the time of shipment from the factory VTI further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology formerly National Bureau of Standards to the extent allowed by that organization s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY The product referred to herein is warranted against defects in material and workmanship for a period of one year from the receipt date of the produc
32. t 4 ex1200 7500 DIO Slot 7 ex1200 dmm DMM Je Network Configuration V Time Configuration LXI LXI Synchronization ID LXI Identification 302 Blink LAN Indicator IN a Change Password E Upgrade eil Reset lt FIGURE 4 3 EX1200 SOFT FRONT PANEL MAIN PAGE EX1200 7600 SFP Operation 29 VTI Instruments Corp MONITOR AND CONTROL TAB By default the EX1200 7600 SFP opens to the Monitor and Control view From this view the user can define the load s resistance value and set up how failure events are communicated Although the SFP does not expose the entire functionality of the resistance load the SFP can be used to set up the EX1200 7600 for most applications E nsus corporum APOTE 39f C TOT PAE Minds Interner AU uror G v E 10 20 11 158 MIES EE y Favorites m Instruments Corporation EX1200 Soft Front Panel t Tools Soft Front Panel Device Information Monitor and Control OverCurrent OverTemperature Overvoltage Backplane Failsafe Resistance h 499 999 NO 0 ce elected Output Source Backplane Line Connected Internet fa 100 m FIGURE 4 4 EX1200 7600 SOFT FRONT PANEL Failure Indicator LEDs The EX1200 7600 SFP provides four LED indicators to alert the user to specific failure conditions OverCurrent OverTemperature OverVoltage and Backplane Failsafe When an LED turns re
33. t at customer s facility The sole and exclusive remedy for breach of any warranty concerning these goods shall be repair or replacement of defective parts or a refund of the purchase price to be determined at the option of VTI For warranty service or repair this product must be returned to a VTI Instruments authorized service center The product shall be shipped prepaid to VTI and VTI shall prepay all returns of the product to the buyer However the buyer shall pay all shipping charges duties and taxes for products returned to VTI from another country VTI warrants that its software and firmware designated by VTI for use with a product will execute its programming when properly installed on that product VTI does not however warrant that the operation of the product or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The warranty shall not apply to defects resulting from improper or inadequate maintenance by the buyer buyer supplied products or interfacing unauthorized modification or misuse operation outside the environmental specifications for the product or improper site preparation or maintenance VTI Instruments Corp shall not be liable for injury to property other than the goods themselves Other than the limited warranty stated above VTI Instruments Corp makes no other warranties express or implied with respect to the quality of product beyond the description of the goods on the face of the
34. t of the EX1200 family of products and can be mixed and matched with other EX1200 series modules to configure high density measurement and switching systems FEATURES Fault Sensing After power up reset or a fault condition the input will be internally disconnected and the resistance will be set to its maximum value This open circuit configures the EX1200 7600 to its highest resistance removing the load from the device under test A fault condition is the result of exceeding the maximum current maximum voltage or maximum temperature for the module Additionally the module will respond to the chassis BPL_INSFAIL circuit which can be used to open all relays on all cards in a chassis simultaneously A voltage sense out signal provides a scaled indication of the voltage across the resistance and a current sense out signal provides a scaled indication of the current through the circuit both of which can be monitored by an external measurement device such as an EX1200 series DMM This can be used to force all relays open if a set voltage or current is exceeded thereby protecting the unit under test EX1200 7600 Introduction 9 VTI Instruments Corp RES1A ALA oo DIR 325 0 1 ohm Sx NO A 0 20mS VS V A 0 4 ohm ES m ald Blo 0 4 ohm AA 1 ohm ult PAS x o AE oo 2 ohm A 4 ohm SIS x N x
35. uments com e OverTemperature Indicates that when an over temperature condition occurs that an output will be generated on the selected backplane line An over temperature condition is defined as an when the EX1200 7600 board exceeds a surface temperature of 102 C 215 6 F e Backplane Failsafe Indicates that when a backplane failsafe condition occurs an output will be generated on the selected backplane line e Any Failsafe Condition When selected any of the above failure conditions will generate a signal on the selected backplane line Backplane Line Source The Backplane Line field specifies the backplane line that will be used if an failure condition occurs Selecting BPLO BPL7 will send the failure signal to the EX1200 backplane on the selected line When None is selected failures signals are not sent DEVICE INFORMATION TAB If the Device Info tab is clicked information regarding the selected instrument will be displayed including the versions of the SFP firmware and hardware 2 Vr isuuusutz curuoratiu es 200 39ft Front Peal vfidoss h t2rist 4ulurar Go Y Ep bttp 10 20 11 158 cai bii i Y IIS ro B lp Favorites 33 VTI Instruments Corporation EX1200 Soft Front Panel a Tools Soft Front Panel Device Information Monitor and Control Y Version Information e Soft Front Panel Version 3 7 0 Firmware Version 3 6 0 Hardware Version FPGA Version 236 HW Ve
36. ux or LabView Driver included on Distribution CD All components should be immediately inspected for damage upon receipt of the unit ESD precautions should be observed while unpacking and installing the instrument into an EX1200 series mainframe DETERMINE SYSTEM POWER REQUIREMENTS The power requirements of the EX1200 mainframes are provided in the Specifications section of Section 1 It is imperative that the mainframe provide adequate power for the modules installed For more information on EX1200 mainframe power consumption please refer to the EX1200 Series User s Manual P N 82 0127 000 for more information The user should confirm that the power budget for the system for the chassis and all modules installed therein is not exceeded on any voltage line It should be noted that if the mainframe cannot provide adequate power to the module the instrument might not perform to specification and possibly damage the power supply In addition if adequate cooling is not provided the reliability of the instrument will be jeopardized and permanent damage may occur Damage found to have occurred due to inadequate cooling will void the warranty on the instrument in question PLUG IN MODULE INSTALLATION Before installing a plug in module into an EX1200 system make sure that the mainframe is powered down Insert the module into the base unit by orienting the module so that the metal cover of the module can be inserted into the slot of the
37. without commanding switch card or instruments This option is useful as a debugging tool e Cache Per the IVI specification this option specifies whether or not to cache the value of attributes Caching allows IVI drivers to maintain certain instrument settings to avoid sending redundant commands The standard allows for certain values to be cached always or never In VTI IVI drivers all values used are of one of these types As such any values entered have no effect e QueryInstrumentStatus Queries the instrument for errors after each call is made As implemented in the VTI IVI drivers instruments status is always queried regardless of the value of this property 20 EX1200 7600 Programming the Instrument www vtiinstruments com DriverSetup Must be last and contains the following properties o Logfile Allows the user to specify a file to which the driver can log calls and other data o Logmode Specifies the mode in which the log file is opened The allowed modes are e w truncate s the file to zero length or creates a text file for writing e a opens the file for adding information to the end of the file The file is created if it does not exist The stream is positioned at the end of the file o LogLevel Allows the user to determine the severity of a log message by providing a level indicator to the log entry o Slots This is the most commonly used option and it allows for a slot number or a slot number and a card mode
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