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National Instruments PC-OPDIO-16 a. Load sinking current, Figure 3-2. Signal Connection Example for Isolated Output, b. Load sourcing current

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Chapter 3 Signal Connections

© National Instruments Corporation 3-5 PC-OPDIO-16 User Manual

Signal Connection ExampleFigure 3-2 shows signal connections for the load connected to an isolated output.

5.6 kΩ5.6 kΩ5.6 kΩ

PC-OPDIO-16

TLP121

Isolation

5.6 kΩ

Load

Digital Logic

+5 V

VCCO

VOUT

COM

IOH

Isolated Ground

470 Ω

5.6 kΩ5.6 kΩ5.6 kΩ

Isolation

5.6 kΩ

Load

Digital Logic

+5 V

VCCO

VOUT

COM

IOL

Isolated Ground

470 Ω

Supply

5–24 VDC

a. Load sinking currentb. Load sourcing current

PC-OPDIO-16

Supply

5–24 VDC

Figure 3-2. Signal Connection Example for Isolated Output

Contents

Main Page Limited Warranty Copyright Trademarks Page Contents About This Manual Chapter 1 Introduction Chapter 2 Installation and Configuration Chapter 3 Signal Connections Chapter 4 Fundamentals of Building Applications with NI-DAQ Page Page About This Manual Organization of This Manual Conventions Used in This Manual National Instruments Documentation Related Documentation Customer Communication Chapter 1 Introduction About Your PC-OPDIO-16 Board What You Need to Get Started Software Programming Choices LabVIEW and LabWindows/CVI Application Software NI-DAQ Driver Software Register-Level Programming Optional Equipment Cabling Unpacking Chapter 2 Installation and Configuration Hardware Installation Hardware Configuration Bus-Related Configuration Data Acquisition-Related Configuration NI-DAQ Software Installation NI-DAQ Installation for DOS NI-DAQ Installation for LabVIEW NI-DAQ Installation for LabWindows/CVI NI-DAQ Installation for Windows Software Configuration Configuring Your PC-OPDIO-16 Using DAQCONF Page Using WDAQCONF Page Page Signal Connections Chapter 3 PC-OPDIO-16 User Manual 3-2 National Instruments Corporation I/O Connectors Figure 3-1 shows the pin assignments for the PC-OPDIO-16 I/O connector. Signal Connection Descriptions Optically Isolated Digital Output Output Channels Chapter 3 Signal Connections National Instruments Corporation 3-5 PC-OPDIO-16 User Manual a. Load sinking current Figure 3-2. Signal Connection Example for Isolated Output b. Load sourcing current Optically Isolated Digital Input Input Channels Page Page Chapter 4 Fundamentals of Building Applications with NI-DAQ Building DOS Applications with NI-DAQ Creating a DOS Application Using Microsoft C Creating a DOS Application Using Visual Basic Page Page Creating a DOS Application Using Borland Turbo C++ or Borland C++ Creating a DOS Application Using Borland Turbo Pascal xxx Building Windows Applications with NI-DAQ The NI-DAQ Libraries NI-DAQ Programming Considerations Buffer Allocation Creating a Windows Application Using Borland C++ Page Creating a Windows Application Using Microsoft Visual C++ Creating a Windows Application Using Turbo Pascal Page Page Creating a Windows Application Using Microsoft Visual Basic Page National Instruments Corporation 5-1 PC-OPDIO-16 User Manual Chapter 5 Theory of Operation Functional Overview The block diagram in Figure 5-1 shows a functional overview of the PC-OPDIO-16. Theory of Operation I/O Channel Interface Circuitry Digital I/O Circuitry Optical Isolation Circuitry Using NI-DAQ Functions for Isolated Digital I/O Using LabVIEW Data Acquisition Library for Digital I/O Chapter 6 NI-DAQ Function Reference Using NI-DAQ Functions Status Codes Variable Data Types Programming Language Considerations Page NI-DAQ for LabWindows/CVI Device Numbers Function Descriptions DIG_In_Line DIG_In_Port DIG_Out_Line DIG_Out_Port Get_DAQ_Device_Info Get_NI_DAQ_Version Init_DA_Brds Appendix A Specifications I/O Connector Electrical Specifications Digital Input Input Characteristics Digital Output Toshiba TLP-121 Phototransistors Power Requirement Physical Operating Environment Storage Environment Page Appendix C Register-Level Programming Base I/O Address Selection Register Map Register Description Register Description Format Digital I/O Register Group Page Programming Page Appendix D Status Codes Page Page Page Page Page Page Page Page Appendix E Customer Communication Technical Support Form PC-OPDIO-16 Hardware and Software Configuration Form National Instruments Products Other Products Documentation Comment Form Glossary Page Index Numbers/Symbols A B C D E F G H L M N O P R S T U V W