National Instruments SCXI-1120 - Manual (Page 8)

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