National Instruments SCXI-1120 user manual

SCXI-1120

User Manual

Eight-Channel Isolated Analog Input Module for Signal Conditioning

August 1994 Edition

Part Number 320425B-01

Contents

Main Page Limited Warranty Copyright Trademarks Warning Regarding Medical and Clinical Use of National Instruments Products Contents About This Manual Chapter 1 Introduction Chapter 2 Configuration and Installation Chapter 3 Theory of Operation Chapter 4 Register Descriptions Chapter 5 Programming Appendix A Specifications Appendix B Rear Signal Connector Appendix C SCXIbus Connector Appendix D SCXI-1120 Front Connector Page Figures Tables About This Manual Organization of This Manual Conventions Used in This Manual Related Documentation Customer Communication Chapter 1 Introduction What Your Kit Should Contain Optional Software Optional Equipment Custom Cables Unpacking Page Page Page Digital Signal Connections Page Page Analog Configuration Page Page Page Hardware Installation Signal Connections Configuration and Installation Chapter 2 SCXI-1120 User Manual 2-12 National Instruments Corporation Front Connector Figure 2-3 shows the pin assignments for the SCXI-1120 front connector. Figure 2-3. SCXI-1120 Front Connector Pin Assignment Front Connector Signal Descriptions Figure 2-4. Ground-Referenced Signal Connection with High Common-Mode Voltage Figure 2-6. Floating AC-Coupled Signal Connection Page Page Page [] [] [] ! Page Page Rear Signal Connector Figure 2-11. SCXI-1120 Rear Signal Connector Pin Assignment Rear Signal Connector Signal Descriptions Page Page Page Page Page Page National Instruments Corporation 3-1 SCXI-1120 User Manual Chapter 3 Theory of Operation Figure 3-1. SCXI-1120 Block Diagram Functional Overview The block diagram in Figure 3-1 illustrates the key functional components of the SCXI-1120. SCXIbus Connector Figure 3-2. SCXIbus Connector Pin Assignment SCXIbus Connector Signal Descriptions Page Digital Interface Digital Control Circuitry Analog and Timing Circuitry Analog Input Channels Figure 3-5. Analog Input Block Diagram Calibration Page >> Scanning Modes Single-Module Parallel Scanning Multiplexed Scanning Page Page Chapter 4 Register Descriptions Register Description Register Description Format SCXI-1120 Registers Page Page Page Slot 0 Register Descriptions Page Page Page Chapter 5 Programming Programming Considerations Notation Register Writes Page Single-Channel Measurements Page Scanning Measurements Page Page Page Page Page Page Scanning Examples Example 1 Example 2 Example 3 Page Appendix A Specifications Analog Input Cold-Junction Sensor [] Physical Operating Environment Storage Environment Appendix B Rear Signal Connector Figure B-1. SCXI-1120 Rear Signal Connector Pin Assignment Rear Signal Connector Signal Descriptions Page Page Figure C-1. SCXIbus Connector Pin Assignment SCXIbus Connector Signal Descriptions Page Appendix D SCXI-1120 Front Connector Figure D-1. SCXI-1120 Front Connector Pin Assignment Front Connector Signal Descriptions Appendix E SCXI-1120 Cabling SCXI-1340 Cable Assembly SCXI-1340 Installation SCXI-1341 Lab-NB, Lab-PC, or Lab-PC+ and SCXI-1344 Lab-LC Cable Assembly SCXI-1341 and SCXI-1344 Installation SCXI-1342 PC-LPM-16 Cable Assembly SCXI-1342 Installation SCXI-1180 Feedthrough Panel SCXI-1180 Installation Page SCXI-1302 50-Pin Terminal Block SCXI-1302 Wiring Procedure SCXI-1302 Installation SCXI-1351 One-Slot Cable Extender SCXI-1351 Installation SCXI-1350 Multichassis Adapter SCXI-1350 Installation SCXI-1343 Rear Screw Terminal Adapter SCXI-1343 Installation Table E-4. SCXI-1343 Pin Connections Page Page Page Appendix G Customer Communication Technical Support Form ___________________________________________________ SCXI-1120 Hardware Configuration Form Documentation Comment Form Glossary Numbers/Symbols A B C Page M N O P R T U V W Index Numbers/Symbols A B C D E F G H I J L M N O P R S Page T U V