Network Card User Manual
Table Of Contents
- SCXI-1121 User Manual
- Support
- Important Information
- 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-1121 Front Connector
- Appendix E SCXI-1121 Cabling
- Appendix F Revision A and B Photo and Parts Locator Diagrams
- Appendix G Technical Support Resources
- Glossary
- Index
- Figures
- Figure 2-1. SCXI-1121 General Parts Locator Diagram
- Figure 2-2. SCXI-1121 Detailed Parts Locator Diagram
- Figure 2-3. SCXI-1121 Front Connector Pin Assignment
- Figure 2-4. Ground-Referenced Signal Connection with High Common-Mode Voltage
- Figure 2-5. Floating Signal Connection Referenced to Chassis Ground for Better Signal-to-Noise Ratio
- Figure 2-6. Floating AC-Coupled Signal Connection
- Figure 2-7. AC-Coupled Signal Connection with High Common-Mode Voltage
- Figure 2-8. Assembling and Mounting the SCXI-1330 Connector-and-Shell Assembly
- Figure 2-9. Nulling Circuit
- Figure 2-10. Shunt Circuit
- Figure 2-11. SCXI-1320 Parts Locator Diagram
- Figure 2-12. SCXI-1328 Parts Locator Diagram
- Figure 2-13. SCXI-1321 Parts Locator Diagram
- Figure 2-14. SCXI-1121 Rear Signal Connector Pin Assignment
- Figure 2-15. SCANCLK Timing Requirements
- Figure 2-16. Slot-Select Timing Diagram
- Figure 2-17. Serial Data Timing Diagram
- Figure 2-18. Configuration Register Write Timing Diagram
- Figure 2-19. SCXI-1121 Module ID Register Timing Diagram
- Figure 3-1. SCXI-1121 Block Diagram
- Figure 3-2. SCXIbus Connector Pin Assignment
- Figure 3-3. Digital Interface Circuitry Block Diagram
- Figure 3-4. SCXI-1121 Digital Control
- Figure 3-5. Analog Input Block Diagram
- Figure 3-6. Analog Output Circuitry
- Figure 3-7. Single-Module Parallel Scanning
- Figure 3-8. Single-Module Multiplexed Scanning (Direct)
- Figure 3-9. Single-Module Multiplexed Scanning (Indirect)
- Figure 3-10. Multiple-Module Multiplexed Scanning
- Figure 3-11. Multiple-Chassis Scanning
- Figure B-1. SCXI-1121 Rear Signal Connector Pin Assignment
- Figure C-1. SCXIbus Connector Pin Assignment
- Figure D-1. SCXI-1121 Front Connector Pin Assignment
- Figure E-1. SCXI-1340 Installation
- Figure E-2. SCXI-1180 Rear Connections
- Figure E-3. SCXI-1180 Front Panel Installation
- Figure E-4. Cover Removal
- Figure F-1. Revision A and B SCXI-1121 Signal Conditioning Module
- Figure F-2. Revision A and B SCXI-1121 General Parts Locator Diagram
- Figure F-3. Revision A and B SCXI-1121 Detailed Parts Locator Diagram
- Tables
- Table 2-1. Digital Signal Connections, Jumper Settings
- Table 2-2. Jumper W33 Settings
- Table 2-3. Gain Jumper Allocation
- Table 2-4. Gain Jumper Positions
- Table 2-5. Filter Jumper Allocation
- Table 2-6. Voltage and Current Mode Excitation Jumper Setup
- Table 2-7. Maximum Load per Excitation Channel
- Table 2-8. Excitation Level Jumper Selection
- Table 2-9. Completion Network Jumpers
- Table 2-10. Trimmer Potentiometer and Corresponding Channel
- Table 2-11. Nulling Resistors and Corresponding Channel
- Table 2-12. Jumper Settings of the Nulling Circuits
- Table 2-13. Jumper Settings on the SCXI-1320 Terminal Block
- Table 2-14. Jumper Settings on the SCXI-1328 Terminal Block
- Table 2-15. Jumper Settings on the SCXI-1321 Terminal Block
- Table 2-16. SCXIbus to SCXI-1121 Rear Signal Connector to Data Acquisition Board Pin Equivalences
- Table 3-1. SCXIbus Equivalents for the Rear Signal Connector
- Table 3-2. Calibration Potentiometer Reference Designators
- Table 5-1. SCXI-1121 Rear Signal Connector Pin Equivalences
- Table E-1. SCXI-1121 and MIO-16 Pinout Equivalences
- Table E-2. SCXI-1341 and SCXI-1344 Pin Translations
- Table E-3. SCXI-1342 Pin Translations
- Table E-4. SCXI-1343 Pin Connections
Index
SCXI-1121 User Manual Index-4 www.natinst.com
F
FIFO Register
description, 4-9
register writes, 5-2 to 5-4
filter jumpers
allocation (table), 2-9
description, 2-9
fixed jumpers, 2-2
floating signal connections
AC-coupled (figure), 2-21
referenced to chassis ground
(figure), 2-20
FOUTEN* bit, 4-5
front connector, 2-16 to 2-36
analog input channels, 2-20 to 2-22
connector-and-shell assembly,
2-22 to 2-24
excitation channels, 2-22
pin assignments (figure), 2-17, D-2
SCXI-1320, SCXI-1328, and SCXI-1321
terminal blocks, 2-24 to 2-36
signal descriptions (table), 2-18 to 2-19,
D-3 to D-4
temperature sensor connection, 2-22
FRT bit, 4-7
G
gain jumpers
allocation (table), 2-8
positions (table), 2-8
grounding, jumper settings for, 2-6 to 2-7
ground-referenced signal connections
with high common-mode voltage
(figure), 2-20
referenced to chassis ground
(figure), 2-20
GUARD signal (table), 3-4, C-3
H
half-bridge completion
completion network jumpers (table),
2-12 to 2-13
using internal half-bridge
completion, 2-12
Hardscan Control Register (HSCR)
description, 4-7 to 4-8
register writes, 5-2 to 5-4
hardware installation, 2-14
HSRS* bit, 4-7
I
indirect measurements, single-channel,
5-5to5-6
from other modules, 5-5
from SCXI-1121 via another
module, 5-55-6
indirect multiplexed scanning, single-module,
5-11 to 5-12
channel scanning from other
modules, 5-11
channel scanning from SCXI-1121 via
another module, 5-11 to 5-12
initialization of registers, 5-4
input channel jumpers, 2-8 to 2-13
excitation jumpers, 2-9 to 2-13
current and voltage jumpers,
2-9to2-10
excitation level, 2-10 to 2-11
internal half-bridge completion,
2-12 to 2-13
filter jumpers, 2-9
gain jumpers, 2-8
installation
hardware installation, 2-14
SCXI-1180 feedthrough panel,
E-9toE-10
SCXI-1302 50-pin terminal block, E-11
SCXI-1340 cable assembly, E-3 to E-4