用户手册目录SCXI-1121 User Manual1Support2Worldwide Technical Support and Product Information2National Instruments Corporate Headquarters2Worldwide Offices2Important Information3Warranty3Copyright3Trademarks3WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS3Contents4About This Manual9Conventions9Related Documentation10Chapter 1 Introduction11What Your Kit Should Contain12Optional Software12Optional Equipment14Custom Cables15Unpacking16Chapter 2 Configuration and Installation17Module Configuration17Digital Signal Connections19Jumper W4419Jumper W3820Jumper W3220Using Jumpers W32 and W3820Analog Configuration22Grounding, Shielding, and Reference Mode Selection22Input Channel Jumpers24Excitation Jumpers25Hardware Installation30Signal Connections31Front Connector32Front Connector Signal Descriptions34Analog Input Channels36Excitation Channels38Temperature Sensor Connection38Connector-and-Shell Assembly38SCXI-1320, SCXI-1328, and SCXI-1321 TerminalBlocks40Rear Signal Connector53Rear Signal Connector Signal Descriptions54Analog Output Signal Connections55Digital I/O Signal Connections56Timing Requirements and Communication Protocol58Communication Signals58Chapter 3 Theory of Operation63Functional Overview63SCXIbus Connector65SCXIbus Connector Signal Descriptions66Digital Interface68Digital Control Circuitry69Analog and Timing Circuitry70Analog Input Channels70Excitation Output Channels73Calibration73Calibration Equipment Requirements73Offset Null Adjust74Excitation Adjust75Analog Output Circuitry77Scanning Modes79Single-Module Parallel Scanning79Multiplexed Scanning79Single-Module Multiplexed Scanning80Multiple-Module Multiplexed Scanning81Multiple-Chassis Scanning82Chapter 4 Register Descriptions83Register Description83Register Description Format83SCXI-1121 Registers83Slot 0 Register Descriptions87Chapter 5 Programming92Programming Considerations92Notation92Register Writes93Register Selection and Write Procedure93Initialization94Single-Channel Measurements95Direct Measurements95Indirect Measurements96Scanning Measurements981. Data Acquisition Board Setup Programming982. Module Programming1013. Programming the Slot 0 Hardscan Circuitry1044. Acquisition Enable, Triggering, and Servicing105Scanning Examples106Example 1106Example 2106Example 3107Appendix A Specifications109Appendix B Rear Signal Connector113Appendix C SCXIbus Connector115Appendix D SCXI-1121 Front Connector119Appendix E SCXI-1121 Cabling123Appendix F Revision A and B Photo and Parts Locator Diagrams139Appendix G Technical Support Resources142Glossary144Numbers/Symbols144A144B-D145E-H146I-M147N-R148S-T149U-W150Index151Numbers151A-B151C152D-E153F-I154J-M155N-P156R157S158T-V161W162Figures7Figure 2-1. SCXI-1121 General Parts Locator Diagram17Figure 2-2. SCXI-1121 Detailed Parts Locator Diagram18Figure 2-3. SCXI-1121 Front Connector Pin Assignment33Figure 2-4. Ground-Referenced Signal Connection with High Common-Mode Voltage36Figure 2-5. Floating Signal Connection Referenced to Chassis Ground for Better Signal-to-Noise Ratio36Figure 2-6. Floating AC-Coupled Signal Connection37Figure 2-7. AC-Coupled Signal Connection with High Common-Mode Voltage37Figure 2-8. Assembling and Mounting the SCXI-1330 Connector-and-Shell Assembly39Figure 2-9. Nulling Circuit43Figure 2-10. Shunt Circuit45Figure 2-11. SCXI-1320 Parts Locator Diagram50Figure 2-12. SCXI-1328 Parts Locator Diagram51Figure 2-13. SCXI-1321 Parts Locator Diagram52Figure 2-14. SCXI-1121 Rear Signal Connector Pin Assignment53Figure 2-15. SCANCLK Timing Requirements58Figure 2-16. Slot-Select Timing Diagram59Figure 2-17. Serial Data Timing Diagram60Figure 2-18. Configuration Register Write Timing Diagram61Figure 2-19. SCXI-1121 Module ID Register Timing Diagram62Figure 3-1. SCXI-1121 Block Diagram63Figure 3-2. SCXIbus Connector Pin Assignment65Figure 3-3. Digital Interface Circuitry Block Diagram68Figure 3-4. SCXI-1121 Digital Control69Figure 3-5. Analog Input Block Diagram71Figure 3-6. Analog Output Circuitry77Figure 3-7. Single-Module Parallel Scanning79Figure 3-8. Single-Module Multiplexed Scanning (Direct)80Figure 3-9. Single-Module Multiplexed Scanning (Indirect)81Figure 3-10. Multiple-Module Multiplexed Scanning81Figure 3-11. Multiple-Chassis Scanning82Figure B-1. SCXI-1121 Rear Signal Connector Pin Assignment113Figure C-1. SCXIbus Connector Pin Assignment116Figure D-1. SCXI-1121 Front Connector Pin Assignment120Figure E-1. SCXI-1340 Installation126Figure E-2. SCXI-1180 Rear Connections131Figure E-3. SCXI-1180 Front Panel Installation132Figure E-4. Cover Removal133Figure F-1. Revision A and B SCXI-1121 Signal Conditioning Module139Figure F-2. Revision A and B SCXI-1121 General Parts Locator Diagram140Figure F-3. Revision A and B SCXI-1121 Detailed Parts Locator Diagram141Tables8Table 2-1. Digital Signal Connections, Jumper Settings21Table 2-2. Jumper W33 Settings23Table 2-3. Gain Jumper Allocation24Table 2-4. Gain Jumper Positions24Table 2-5. Filter Jumper Allocation25Table 2-6. Voltage and Current Mode Excitation Jumper Setup26Table 2-7. Maximum Load per Excitation Channel27Table 2-8. Excitation Level Jumper Selection27Table 2-9. Completion Network Jumpers28Table 2-10. Trimmer Potentiometer and Corresponding Channel41Table 2-11. Nulling Resistors and Corresponding Channel42Table 2-12. Jumper Settings of the Nulling Circuits44Table 2-13. Jumper Settings on the SCXI-1320 Terminal Block48Table 2-14. Jumper Settings on the SCXI-1328 Terminal Block48Table 2-15. Jumper Settings on the SCXI-1321 Terminal Block48Table 2-16. SCXIbus to SCXI-1121 Rear Signal Connector to Data Acquisition Board Pin Equivalences57Table 3-1. SCXIbus Equivalents for the Rear Signal Connector67Table 3-2. Calibration Potentiometer Reference Designators76Table 5-1. SCXI-1121 Rear Signal Connector Pin Equivalences93Table E-1. SCXI-1121 and MIO-16 Pinout Equivalences124Table E-2. SCXI-1341 and SCXI-1344 Pin Translations127Table E-3. SCXI-1342 Pin Translations129Table E-4. SCXI-1343 Pin Connections136文件大小: 1.9 MB页数: 162Language: English打开用户手册
用户手册目录SCXI-1121 User Manual1Support2Worldwide Technical Support and Product Information2National Instruments Corporate Headquarters2Worldwide Offices2Important Information3Warranty3Copyright3Trademarks3WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS3Contents4About This Manual9Conventions9Related Documentation10Chapter 1 Introduction11What Your Kit Should Contain12Optional Software12Optional Equipment14Custom Cables15Unpacking16Chapter 2 Configuration and Installation17Module Configuration17Digital Signal Connections19Jumper W4419Jumper W3820Jumper W3220Using Jumpers W32 and W3820Analog Configuration22Grounding, Shielding, and Reference Mode Selection22Input Channel Jumpers24Excitation Jumpers25Hardware Installation30Signal Connections31Front Connector32Front Connector Signal Descriptions34Analog Input Channels36Excitation Channels38Temperature Sensor Connection38Connector-and-Shell Assembly38SCXI-1320, SCXI-1328, and SCXI-1321 TerminalBlocks40Rear Signal Connector53Rear Signal Connector Signal Descriptions54Analog Output Signal Connections55Digital I/O Signal Connections56Timing Requirements and Communication Protocol58Communication Signals58Chapter 3 Theory of Operation63Functional Overview63SCXIbus Connector65SCXIbus Connector Signal Descriptions66Digital Interface68Digital Control Circuitry69Analog and Timing Circuitry70Analog Input Channels70Excitation Output Channels73Calibration73Calibration Equipment Requirements73Offset Null Adjust74Excitation Adjust75Analog Output Circuitry77Scanning Modes79Single-Module Parallel Scanning79Multiplexed Scanning79Single-Module Multiplexed Scanning80Multiple-Module Multiplexed Scanning81Multiple-Chassis Scanning82Chapter 4 Register Descriptions83Register Description83Register Description Format83SCXI-1121 Registers83Slot 0 Register Descriptions87Chapter 5 Programming92Programming Considerations92Notation92Register Writes93Register Selection and Write Procedure93Initialization94Single-Channel Measurements95Direct Measurements95Indirect Measurements96Scanning Measurements981. Data Acquisition Board Setup Programming982. Module Programming1013. Programming the Slot 0 Hardscan Circuitry1044. Acquisition Enable, Triggering, and Servicing105Scanning Examples106Example 1106Example 2106Example 3107Appendix A Specifications109Appendix B Rear Signal Connector113Appendix C SCXIbus Connector115Appendix D SCXI-1121 Front Connector119Appendix E SCXI-1121 Cabling123Appendix F Revision A and B Photo and Parts Locator Diagrams139Appendix G Technical Support Resources142Glossary144Numbers/Symbols144A144B-D145E-H146I-M147N-R148S-T149U-W150Index151Numbers151A-B151C152D-E153F-I154J-M155N-P156R157S158T-V161W162Figures7Figure 2-1. SCXI-1121 General Parts Locator Diagram17Figure 2-2. SCXI-1121 Detailed Parts Locator Diagram18Figure 2-3. SCXI-1121 Front Connector Pin Assignment33Figure 2-4. Ground-Referenced Signal Connection with High Common-Mode Voltage36Figure 2-5. Floating Signal Connection Referenced to Chassis Ground for Better Signal-to-Noise Ratio36Figure 2-6. Floating AC-Coupled Signal Connection37Figure 2-7. AC-Coupled Signal Connection with High Common-Mode Voltage37Figure 2-8. Assembling and Mounting the SCXI-1330 Connector-and-Shell Assembly39Figure 2-9. Nulling Circuit43Figure 2-10. Shunt Circuit45Figure 2-11. SCXI-1320 Parts Locator Diagram50Figure 2-12. SCXI-1328 Parts Locator Diagram51Figure 2-13. SCXI-1321 Parts Locator Diagram52Figure 2-14. SCXI-1121 Rear Signal Connector Pin Assignment53Figure 2-15. SCANCLK Timing Requirements58Figure 2-16. Slot-Select Timing Diagram59Figure 2-17. Serial Data Timing Diagram60Figure 2-18. Configuration Register Write Timing Diagram61Figure 2-19. SCXI-1121 Module ID Register Timing Diagram62Figure 3-1. SCXI-1121 Block Diagram63Figure 3-2. SCXIbus Connector Pin Assignment65Figure 3-3. Digital Interface Circuitry Block Diagram68Figure 3-4. SCXI-1121 Digital Control69Figure 3-5. Analog Input Block Diagram71Figure 3-6. Analog Output Circuitry77Figure 3-7. Single-Module Parallel Scanning79Figure 3-8. Single-Module Multiplexed Scanning (Direct)80Figure 3-9. Single-Module Multiplexed Scanning (Indirect)81Figure 3-10. Multiple-Module Multiplexed Scanning81Figure 3-11. Multiple-Chassis Scanning82Figure B-1. SCXI-1121 Rear Signal Connector Pin Assignment113Figure C-1. SCXIbus Connector Pin Assignment116Figure D-1. SCXI-1121 Front Connector Pin Assignment120Figure E-1. SCXI-1340 Installation126Figure E-2. SCXI-1180 Rear Connections131Figure E-3. SCXI-1180 Front Panel Installation132Figure E-4. Cover Removal133Figure F-1. Revision A and B SCXI-1121 Signal Conditioning Module139Figure F-2. Revision A and B SCXI-1121 General Parts Locator Diagram140Figure F-3. Revision A and B SCXI-1121 Detailed Parts Locator Diagram141Tables8Table 2-1. Digital Signal Connections, Jumper Settings21Table 2-2. Jumper W33 Settings23Table 2-3. Gain Jumper Allocation24Table 2-4. Gain Jumper Positions24Table 2-5. Filter Jumper Allocation25Table 2-6. Voltage and Current Mode Excitation Jumper Setup26Table 2-7. Maximum Load per Excitation Channel27Table 2-8. Excitation Level Jumper Selection27Table 2-9. Completion Network Jumpers28Table 2-10. Trimmer Potentiometer and Corresponding Channel41Table 2-11. Nulling Resistors and Corresponding Channel42Table 2-12. Jumper Settings of the Nulling Circuits44Table 2-13. Jumper Settings on the SCXI-1320 Terminal Block48Table 2-14. Jumper Settings on the SCXI-1328 Terminal Block48Table 2-15. Jumper Settings on the SCXI-1321 Terminal Block48Table 2-16. SCXIbus to SCXI-1121 Rear Signal Connector to Data Acquisition Board Pin Equivalences57Table 3-1. SCXIbus Equivalents for the Rear Signal Connector67Table 3-2. Calibration Potentiometer Reference Designators76Table 5-1. SCXI-1121 Rear Signal Connector Pin Equivalences93Table E-1. SCXI-1121 and MIO-16 Pinout Equivalences124Table E-2. SCXI-1341 and SCXI-1344 Pin Translations127Table E-3. SCXI-1342 Pin Translations129Table E-4. SCXI-1343 Pin Connections136文件大小: 1.9 MB页数: 162Language: English打开用户手册