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VXI-SC-1102 User Manual

32-Channel Multiplexer Amplifier Module

February 1997 Edition

Part Number 321385A-01

01Title.book : 01Title.frm Page 1 Friday, March 21, 1997 3:40 PM

Summary of Contents for VXI-SC-1102

Page 1: ...nual 32 Channel Multiplexer Amplifier Module February 1997 Edition Part Number 321385A 01 Copyright 1997 National Instruments Corporation All Rights Reserved 01Title book 01Title frm Page 1 Friday Mar...

Page 2: ...2321 France 01 48 14 24 24 Germany 089 741 31 30 Hong Kong 2645 3186 Israel 03 5734815 Italy 02 413091 Japan 03 5472 2970 Korea 02 596 7456 Mexico 5 520 2635 Netherlands 0348 433466 Norway 32 84 84 0...

Page 3: ...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 act...

Page 4: ...1 3 Software Programming Choices 1 3 National Instruments Application Software 1 3 NI DAQ Driver Software 1 4 VXIplug play Instrument Driver 1 5 Optional Equipment 1 6 Unpacking 1 6 Chapter 2 Install...

Page 5: ...Appendix A Specifications Appendix B Customer Communication Glossary Index Figures Figure 1 1 VXI Signal Conditioning System 1 1 Figure 1 2 The Relationship between the Programming Environment Your In...

Page 6: ...ation vii VXI SC 1102 User Manual Figure 4 1 VXI SC 1102 Block Diagram 4 1 Figure 5 1 Analog Bus Receptacle Pin Assignment 5 2 Tables Table 3 1 Front Connector Signal Descriptions 3 3 01Title book 03T...

Page 7: ...VXI SC 1102 lists what you need to get started optional software and optional equipment and explains how to unpack the VXI SC 1102 Chapter 2 Installation describes how to install current loop receiver...

Page 8: ...cross reference or an introduction to a key concept monospace Denotes text or characters that are to be literally input from the keyboard sections of code programming examples and syntax examples This...

Page 9: ...er software includes NI DAQ and VXIplug play instrument drivers After you set up your hardware system use either your application or driver software documentation to help you write your application If...

Page 10: ...f the VXI signal conditioning system which consists of a carrier module and one or more VXI signal conditioning submodules or filler panels as shown in Figure 1 1 Figure 1 1 VXI Signal Conditioning Sy...

Page 11: ...with a 2 Hz cutoff frequency to reject 60 Hz noise Each channel also has an amplifier with a selectable gain of 1 or 100 You can multiplex the VXI SC 1102 inputs to a single output which drives a sin...

Page 12: ...when programming your National Instruments VXI DAQ hardware You can use LabVIEW LabWindows CVI ComponentWorks VirtualBench or other application development environments with either NI DAQ or the VXIpl...

Page 13: ...load and save waveform data to disk in the same forms that can be used in popular spreadsheet programs and word processors Using LabVIEW LabWindows CVI ComponentWorks or VirtualBench software will gr...

Page 14: ...contain high level software functions whose architecture is specified by the VXIplug play Systems Alliance The VXIplug play standards increase interoperability with other vendors and ensure that driv...

Page 15: ...o prevent electrostatic damage to the submodule Electrostatic discharge can damage several components on the submodule To avoid such damage in handling the submodule take the following precautions Gro...

Page 16: ...l current loop receivers on your VXI SC 1102 and gives information about installing your VXI SC 1102 submodule into the VXI SC 1000 carrier module Refer to Figure 2 1 VXI SC 1102 Parts Locator Diagram...

Page 17: ...2 Installation VXI SC 1102 User Manual 2 20 National Instruments Corporation 1 Serial Number 2 Product Name 3 Assembly Number 4 RCLx Pads 3 4 2 1 01Title book 06Ch2 frm Page 20 Friday March 21 1997 3...

Page 18: ...sure that there are no signals connected to your submodule front connector Install the resistors by performing the following steps 1 Follow the instructions in the VXI SC 1000 Carrier Module Installat...

Page 19: ...ration Installing Your Hardware Follow the instructions in the VXI SC 1000 Carrier Module Installation Guide to replace the VXI SC 1102 submodule and to install the assembled VXI SC carrier module in...

Page 20: ...t connector Caution Static electricity is a major cause of component failure To prevent damage to the electrical components in the module observe antistatic techniques whenever removing a module from...

Page 21: ...31 32 A CH31 CH30 CH29 CH28 CH27 CH26 CH25 CH24 CH23 CH22 CH21 CH20 CH19 CH18 CH17 CH16 CH15 CH14 CH13 CH12 CH11 CH10 CH9 CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0 CH31 CH30 CH29 CH28 CH27 CH26 CH25 CH24 CH...

Page 22: ...gain selected on the VXI SC 1102 input channel This differential input range is the maximum measurable voltage difference between the positive and negative channel inputs The common mode input signal...

Page 23: ...uch voltage application Note Exceeding the differential or common mode input channel ranges results in a distorted signal measurement Ground Referencing Your Signals Your input signals can be either g...

Page 24: ...ational Instruments Corporation 3 27 VXI SC 1102 User Manual Figure 3 2 Ground Referenced Signal Connection Vdiff V CH0 Front Signal Connector CH0 CH1 CH1 VXI SC 1102 cm 01Title book 07Ch3 frm Page 27...

Page 25: ...XI SC 1102 so the position of the MTEMP DTEMP switch on the VXI TB Series terminal block does not matter The input is overvoltage protected to 15 VDC with the power on and off Warning Exceeding the ov...

Page 26: ...VXI SC 1102 Figure 4 1 VXI SC 1102 Block Diagram Front Signal Connector CH 0 Gain 0 CH 0 CH 31 CH 31 Lowpass Filter Digital Control Calibration EEPROM Lowpass Filter Lowpass Filter CJSENSOR Gain 31 G...

Page 27: ...e address handler and the following registers Module ID Configuration Status EEPROM Gain and Channel The address handler controls which register is being addressed The Module ID Register contains the...

Page 28: ...consists of a thermistor located on a National Instruments VXI terminal block The temperature sensor is for cold junction compensation of thermocouples The CJSENSOR channel also passes through a 2 Hz...

Page 29: ...data in the EEPROM refer to the VXI SC 1102 Register Level Programmer Manual for a more detailed description of the EEPROM In order to calibrate the VXI SC 1102 you will need to apply precision voltag...

Page 30: ...the VXI SC 1102 for a given gain perform the following steps for a two point calibration For two point calibration it is best to use input voltages that correspond to the signal range of interest For...

Page 31: ...units to your VXI MIO module binary unit You must take into consideration the polarity of your VXI MIO module its resolution 12 bits or 16 bits and gain For example if you are using the 12 bit VXI MI...

Page 32: ...elp you calibrate the VXI SC 1102 The calibration constants are stored only in NI DAQ memory The input output voltage pairs read by a DMM must be entered by hand Before this program is run the NI DAQ...

Page 33: ...do fputs prompt stdout fflush stdin ret scanf lf value while ret return value void main int vxiChassisID commPath moduleSlot slot of module to calibrate moduleChan short dummyRangeCode 0 dummyDAQboard...

Page 34: ...he chassis while commPath 0 dummyDAQboard commPath dummyDAQrange MIO_FULL_SCALE dummyDAQgain scale pow 2 0 12 0 dummyDAQgain 10 factor for converting to format of 12 bit bipolar DAQ board SCXI_Reset v...

Page 35: ...input voltage User enters vInput2 vOutput2 enterFloat Enter VXI SC 1102 output voltage User enters vOutput2 binOutput1 vOutput1 scale binOutput2 vOutput2 scale Convert to DAQ board s format SCXI_Cal_C...

Page 36: ...n 1 Max working voltage signal common mode Each input should remain within 10 V of CGND Input damage level 42 VAC peak or VDC Inputs protected CH 0 31 CJSENSOR Transfer Characteristics Nonlinearity 0...

Page 37: ...rload 10 k Input bias current 0 5 nA Input offset current 1 0 nA CMRR 50 to 60 Hz either gain 110 dB 0 Hz gain 1 75 dB min 0 Hz gain 100 100 dB min Output range 10 V Output impedance 91 Dynamic Charac...

Page 38: ...in temperature coefficient 10 ppm C Physical Dimensions 115 by 273 mm 4 54 by 10 75 in I O connector 50 pin male ribbon cable rear connector 96 pin male DIN C front connector Environment Operating tem...

Page 39: ...ons 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...

Page 40: ...our software to obtain support Telephone Fax Australia 03 9879 5166 03 9879 6277 Austria 0662 45 79 90 0 0662 45 79 90 19 Belgium 02 757 00 20 02 757 03 11 Canada Ontario 905 785 0085 905 785 0086 Can...

Page 41: ...________________ _______________________________________________________________________________ National Instruments hardware product model __________ Revision ______________________ Configuration __...

Page 42: ...____ Microprocessor _______________________________________________________________ Clock frequency _______________________________________________________________ Type of video board installed ______...

Page 43: ...____________________ _______________________________________________________________________________ _______________________________________________________________________________ ___________________...

Page 44: ...ers Symbols 5 V 5 volt signal degrees ohms percent plus or minus A AC alternating current A D analog to digital Prefix Meaning Value p pico 10 12 n nano 10 9 micro 10 6 m milli 10 3 k kilo 103 M mega...

Page 45: ...und signal channel pin or wire lead to which you apply or from which you read the analog or digital signal Analog signals can be single ended or differential For digital signals you group channels to...

Page 46: ...of signal conditioning that allows you to filter unwanted signals from the signal you are trying to measure G G gain the factor by which a signal is amplified sometimes expressed in decibels H hex hex...

Page 47: ...o vibration or shock MB megabytes of memory MIO multifunction I O MSB most significant bit mux multiplexer a switching device with multiple inputs that sequentially connects each of its inputs to its...

Page 48: ...unction produces a small voltage as a function of the temperature transducer excitation a type of signal conditioning that uses external voltages and currents to excite the circuitry of a signal condi...

Page 49: ...eXtensions for Instrumentation VXIplug play A group of VXI developers dedicated to making VXI devices as Systems Alliance easy to use as possible primarily by simplifying software development W wavef...

Page 50: ...ange 3 4 differential input signal range 3 3 exceeding input levels and ranges warning 3 4 signal terminals 3 3 Channel Register 4 2 CJSENSOR signal cold junction sensor connection 3 6 description tab...

Page 51: ...to 1 5 P parts locator diagram 2 2 physical specifications A 3 pins front connector pin assignments figure 3 2 front connector signal descriptions table 3 3 power requirements A 3 R requirements for g...

Page 52: ...els 4 3 analog output 4 3 block diagram of VXI SC 1102 4 1 digital control circuitry 4 2 functional overview 4 1 to 4 2 VXIbus interface 4 2 U unpacking the VXI SC 1102 1 6 V VirtualBench application...

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