National Instruments SCXI-1120 User Manual

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Contents

Contents© National Instruments Corporation ix SCXI-1120 User ManualFiguresFigure 2-1. SCXI-1120 General Parts Locator Diagram ......................................................2-2Figure 2-2. Detailed Parts Locator Diagram.........................................................................2-3Figure 2-3. SCXI-1120 Front Connector Pin Assignment ...................................................2-12Figure 2-4. Ground-Referenced Signal Connection with High Common-Mode Voltage ....2-14Figure 2-5. Floating Signal Connection Referenced to Chassis Ground for BetterSignal-to-Noise Ratio.........................................................................................2-14Figure 2-6. Floating AC-Coupled Signal Connection ..........................................................2-14Figure 2-7. AC-Coupled Signal Connection with High Common-Mode Voltage ............... 2-15Figure 2-8. Assembling and Mounting the SCXI-1330 Connector-and-Shell Assembly .... 2-17Figure 2-9. SCXI-1320 Parts Locator Diagram ....................................................................2-21Figure 2-10. SCXI-1328 Parts Locator Diagram ....................................................................2-22Figure 2-11. SCXI-1120 Rear Signal Connector Pin Assignment ......................................... 2-24Figure 2-12. SCANCLK Timing Requirements .....................................................................2-28Figure 2-13. Slot-Select Timing Diagram ..............................................................................2-29Figure 2-14. Serial Data Timing Diagram ..............................................................................2-30Figure 2-15. Configuration Register Write Timing Diagram .................................................2-31Figure 2-16. SCXI-1120 Module ID Register Timing Diagram ............................................2-31Figure 3-1. SCXI-1120 Block Diagram................................................................................3-1Figure 3-2. SCXIbus Connector Pin Assignment .................................................................3-3Figure 3-3. Digital Interface Circuitry Block Diagram ........................................................3-6Figure 3-4. SCXI-1120 Digital Control ................................................................................3-7Figure 3-5. Analog Input Block Diagram .............................................................................3-9Figure 3-6. Analog Output Circuitry ....................................................................................3-12Figure 3-7. Single-Module Parallel Scanning.......................................................................3-14Figure 3-8. Single-Module Multiplexed Scanning (Direct).................................................. 3-15Figure 3-9. Single-Module Multiplexed Scanning (Indirect) ...............................................3-15Figure 3-10. Multiple-Module Multiplexed Scanning............................................................3-16Figure 3-11. Multiple-Chassis Scanning ................................................................................3-16Figure B-1. SCXI-1120 Rear Signal Connector Pin Assignment .........................................B-1Figure C-1. SCXIbus Connector Pin Assignment .................................................................C-2Figure D-1. SCXI-1120 Front Connector Pin Assignment ...................................................D-1Figure E-1. SCXI-1340 Installation ......................................................................................E-3Figure E-2. SCXI-1180 Rear Connections............................................................................E-7Figure E-3. SCXI-1180 Front Panel Installation................................................................... E-8Figure E-4. Cover Removal .................................................................................................. E-9Figure F-1. Revision A and B SCXI-1120 Signal Conditioning Module .............................F-1Figure F-2. Revision A and B SCXI-1120 General Parts Locator Diagram.........................F-2Figure F-3. Revision A and B SCXI-1120 Detailed Parts Locator Diagram........................F-3