National Instruments Module SCXI-1503 Uživatelský manuál

SCXITMSCXI-1503 User ManualMarch 2007374271A-01

Chapter 1 About the SCXI-1503SCXI-1503 User Manual 1-2 ni.com– One of the following:• SCXI-1600• E/M Series DAQ device– Computer– Cabling, cable adapt

Chapter 1 About the SCXI-1503© National Instruments Corporation 1-3 SCXI-1503 User Manual• SCXI or PXI/SCXI chassis manual—Read this manual for mainte

Chapter 1 About the SCXI-1503SCXI-1503 User Manual 1-4 ni.comInstalling Application Software, NI-DAQ, and the E/M Series DAQ DeviceRefer to the DAQ Ge

Chapter 1 About the SCXI-1503© National Instruments Corporation 1-5 SCXI-1503 User ManualVerifying the SCXI-1503 InstallationRefer to the SCXI Quick S

© National Instruments Corporation 2-1 SCXI-1503 User Manual2Connecting SignalsThis chapter describes the input and output signal connections to the S

Chapter 2 Connecting SignalsSCXI-1503 User Manual 2-2 ni.comNote Exceeding the differential or common-mode input channel ranges results in a distorted

Chapter 2 Connecting Signals© National Instruments Corporation 2-3 SCXI-1503 User Manual4-Wire ConfigurationThe 4-wire configuration, also referred to

Chapter 2 Connecting SignalsSCXI-1503 User Manual 2-4 ni.com2-Wire ConfigurationThe basic 2-wire configuration is shown in Figure 2-2. In this configu

Chapter 2 Connecting Signals© National Instruments Corporation 2-5 SCXI-1503 User Manual3-Wire Resistive Sensor ConfigurationIf you are using a 3-wire

Chapter 2 Connecting SignalsSCXI-1503 User Manual 2-6 ni.comLead-Resistance Compensation Using a 3-Wire Resistive Sensor and Two Matched Current Sourc

SupportWorldwide Technical Support and Product Informationni.comNational Instruments Corporate Headquarters11500 North Mopac Expressway Austin, Texas

Chapter 2 Connecting Signals© National Instruments Corporation 2-7 SCXI-1503 User ManualIn this configuration, the lead-resistance voltage drop across

Chapter 2 Connecting SignalsSCXI-1503 User Manual 2-8 ni.comTable 2-1. Front Signal Pin AssignmentsFront Connector Diagram Pin Number Column A Column

Chapter 2 Connecting Signals© National Instruments Corporation 2-9 SCXI-1503 User ManualTable 2-2. Signal DescriptionsPin Signal Name DescriptionA1 +

Chapter 2 Connecting SignalsSCXI-1503 User Manual 2-10 ni.comRear Signal ConnectorTable 2-3 shows the SCXI-1503 module rear signal connector pin assig

Chapter 2 Connecting Signals© National Instruments Corporation 2-11 SCXI-1503 User ManualRear Signal Connector DescriptionsThe rear signal connector o

Chapter 2 Connecting SignalsSCXI-1503 User Manual 2-12 ni.com26 SER DAT OUTP0.4 Output Serial data out—this signal taps into the SCXIbus MISO line to

© National Instruments Corporation 3-1 SCXI-1503 User Manual3Configuring and TestingThis chapter discusses configuring the SCXI-1503 in MAX using NI-D

Chapter 3 Configuring and TestingSCXI-1503 User Manual 3-2 ni.comInput CouplingThe front end of the SCXI-1503 includes a software configurable switch

Chapter 3 Configuring and Testing© National Instruments Corporation 3-3 SCXI-1503 User ManualNI-DAQmxUsing NI-DAQmx, you can configure software settin

Chapter 3 Configuring and TestingSCXI-1503 User Manual 3-4 ni.comselecting channels. If you are creating a channel, you can only select one channel. C

Important InformationWarrantyThe SCXI-1503 is warranted against defects in materials and workmanship for a period of one year from the date of shipme

Chapter 3 Configuring and Testing© National Instruments Corporation 3-5 SCXI-1503 User Manual6. Click the Test button.7. Click the Start button.8. Aft

© National Instruments Corporation 4-1 SCXI-1503 User Manual4Theory of OperationThis chapter provides a brief overview and a detailed discussion of th

Chapter 4 Theory of OperationSCXI-1503 User Manual 4-2 ni.comFigure 4-1. Block Diagram of SCXI-1503AI 15 +AI 15 –Calibration Source SCXIbus Interface

Chapter 4 Theory of Operation© National Instruments Corporation 4-3 SCXI-1503 User ManualThe major components of the SCXI-1503 modules are as follows:

Chapter 4 Theory of OperationSCXI-1503 User Manual 4-4 ni.comThe CJ SENSOR input channel is used to read the sensor temperature from the terminal bloc

Chapter 4 Theory of Operation© National Instruments Corporation 4-5 SCXI-1503 User ManualThe module includes first-in first-out (FIFO) memory for stor

Chapter 4 Theory of OperationSCXI-1503 User Manual 4-6 ni.comchanges in resistance, you must use special configurations that minimize measured errors

Chapter 4 Theory of Operation© National Instruments Corporation 4-7 SCXI-1503 User Manualdefined as the change in RTD resistance from 0 to 100 °C, div

Chapter 4 Theory of OperationSCXI-1503 User Manual 4-8 ni.comAlthough the resistance-temperature curve is relatively linear, accurately converting mea

Chapter 4 Theory of Operation© National Instruments Corporation 4-9 SCXI-1503 User ManualFor temperatures above 0 °C, coefficient C equals 0, reducing

ConventionsThe following conventions are used in this manual:<> Angle brackets that contain numbers separated by an ellipsis represent a range o

Chapter 4 Theory of OperationSCXI-1503 User Manual 4-10 ni.comThermistorsA thermistor is a piece of semiconductor made from metal oxides, pressed into

Chapter 4 Theory of Operation© National Instruments Corporation 4-11 SCXI-1503 User ManualFigure 4-4. Resistance-Temperature Curve for a 2,252 Ω Ther

Chapter 4 Theory of OperationSCXI-1503 User Manual 4-12 ni.comThe maximum resistance of the thermistor is determined from the current excitation value

Chapter 4 Theory of Operation© National Instruments Corporation 4-13 SCXI-1503 User ManualwhereT(°K) is the temperature in degrees Kelvin, equal to T(

© National Instruments Corporation 5-1 SCXI-1503 User Manual5Using the SCXI-1503This chapter makes suggestions for developing your application and pro

Chapter 5 Using the SCXI-1503SCXI-1503 User Manual 5-2 ni.comFigure 5-1. Typical Program Flowchart for Voltage Measurement ChannelsYe sCreate Channel

Chapter 5 Using the SCXI-1503© National Instruments Corporation 5-3 SCXI-1503 User ManualGeneral Discussion of Typical FlowchartThe following sections

Chapter 5 Using the SCXI-1503SCXI-1503 User Manual 5-4 ni.comtime. For continuous acquisition, you must use a while loop around the acquisition compon

Chapter 5 Using the SCXI-1503© National Instruments Corporation 5-5 SCXI-1503 User ManualAnalog Input»General Properties»Advanced»Gain and Offset»Gain

Chapter 5 Using the SCXI-1503SCXI-1503 User Manual 5-6 ni.comAnalog Input»Temperature» RTD»Custom»A, B, CAI.RTD.AAI.RTD.BAI.RTD.CSpecifies the A, B, o

© National Instruments Corporation v SCXI-1503 User ManualContentsChapter 1About the SCXI-1503What You Need to Get Started ...

Chapter 5 Using the SCXI-1503© National Instruments Corporation 5-7 SCXI-1503 User ManualNote This is not a complete list of NI-DAQmx properties and d

Chapter 5 Using the SCXI-1503SCXI-1503 User Manual 5-8 ni.comcharts, graphs, slide controls, and gauge indicators. NI ADEs have tools that allow you t

Chapter 5 Using the SCXI-1503© National Instruments Corporation 5-9 SCXI-1503 User ManualCreate Virtual Channel(s) DAQMX Create Virtual Channel.vi loc

Chapter 5 Using the SCXI-1503SCXI-1503 User Manual 5-10 ni.comUsing a NI-DAQmx Channel Property Node in LabVIEWYou can use property nodes in LabVIEW t

Chapter 5 Using the SCXI-1503© National Instruments Corporation 5-11 SCXI-1503 User ManualNote Refer to the LabVIEW Help for information about propert

Chapter 5 Using the SCXI-1503SCXI-1503 User Manual 5-12 ni.comNote Refer to the NI LabWindows/CVI Help for more information on creating NI-DAQmx tasks

Chapter 5 Using the SCXI-1503© National Instruments Corporation 5-13 SCXI-1503 User ManualProgrammable NI-DAQmx PropertiesAll of the different ADEs th

Chapter 5 Using the SCXI-1503SCXI-1503 User Manual 5-14 ni.comThe functions that are required for externally calibrating the SCXI-1503 are available i

© National Instruments Corporation A-1 SCXI-1503 User ManualASpecificationsThis appendix lists the specifications for the SCXI-1503 modules. These spe

Appendix A SpecificationsSCXI-1503 User Manual A-2 ni.comGain = 100Calibrated1...±25 μV max±10 μV typWith autozero enable

ContentsSCXI-1503 User Manual vi ni.comChapter 4Theory of OperationRear Signal Connector, SCXIbus Connector, and SCXIbus Interface...

Appendix A Specifications© National Instruments Corporation A-3 SCXI-1503 User ManualCMRR characteristics (DC to 60 Hz)Gain 1...

Appendix A SpecificationsSCXI-1503 User Manual A-4 ni.comGain temperature coefficient(gain 1 or 100) ...±15 ppm/°

Appendix A Specifications© National Instruments Corporation A-5 SCXI-1503 User ManualPhysicalFigure A-1. SCXI-1503 DimensionsWeight...

Appendix A SpecificationsSCXI-1503 User Manual A-6 ni.comSafetyThis product is designed to meet the requirements of the following standards of safety

© National Instruments Corporation B-1 SCXI-1503 User ManualBRemoving the SCXI-1503This appendix explains how to remove the SCXI-1503 from MAX and an

Appendix B Removing the SCXI-1503SCXI-1503 User Manual B-2 ni.com4. Rotate the thumbscrews that secure the SCXI-1503 to the chassis counterclockwise u

© National Instruments Corporation C-1 SCXI-1503 User ManualCCommon QuestionsThis appendix lists common questions related to the use of the SCXI-1503.

Appendix C Common QuestionsSCXI-1503 User Manual C-2 ni.comCan I connect N current-output channels in parallel to create a precision current source th

Appendix C Common Questions© National Instruments Corporation C-3 SCXI-1503 User ManualDoes short-circuiting a current-output channel do any damage to

© National Instruments Corporation G-1 SCXI-1503 User ManualGlossarySymbol Prefix Valueµ micro 10–6m milli 10–3k kilo 103Mmega106Numbers/Symbols% perc

Contents© National Instruments Corporation vii SCXI-1503 User ManualAppendix ASpecificationsAppendix BRemoving the SCXI-1503Appendix CCommon Questions

GlossarySCXI-1503 User Manual G-2 ni.comBbit one binary digit, either 0 or 1CCE European emissions control standardC GND chassis ground signalchannel

Glossary© National Instruments Corporation G-3 SCXI-1503 User ManualD GND digital ground signaldifferential amplifier an amplifier with two input term

GlossarySCXI-1503 User Manual G-4 ni.comJjumper a small rectangular device used to connect two adjacent posts on a circuit board. Jumpers are used on

Glossary© National Instruments Corporation G-5 SCXI-1503 User ManualOoutput voltage compliancethe largest voltage that can be generated across the out

GlossarySCXI-1503 User Manual G-6 ni.comsensor a type of transducer that converts a physical phenomenon into an electrical signalSER CLK serial clock

Glossary© National Instruments Corporation G-7 SCXI-1503 User ManualVI virtual instrument—(1) a combination of hardware and/or software elements, typi

© National Instruments Corporation I-1 SCXI-1503 User ManualIndexNumerics2-wire configuration of resistive devices, 2-43-wire resistive sensorconnecte

IndexSCXI-1503 User Manual I-2 ni.comconventions used in the manual, ivcreating a taskDAQ Assistant, 5-3programmatically, 5-3current output channels,

Index© National Instruments Corporation I-3 SCXI-1503 User ManualNI-DAQmx channel property node, 5-10program flowchart (figure), 5-2programmable prope

IndexSCXI-1503 User Manual I-4 ni.comsignalsverifying, 3-4NI-DAQmx, 3-4software, NI-DAQ version required, C-1specificationsanalog input, A-1CE complia

ContentsSCXI-1503 User Manual viii ni.comTablesTable 1-1. Supported SCXI-1503 Terminal Blocks .... 1-4Table

© National Instruments Corporation 1-1 SCXI-1503 User Manual1About the SCXI-1503This manual describes the electrical and mechanical aspects of the SCX