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
Chapter 2 Configuration and Installation
SCXI-1121 User Manual 2-4 www.natinst.com
On Revision C or later modules, jumper W44 does not exist. SLOT0SEL*
is always buffered to the INTR* line.
Jumper W38
Position 1 connects, after buffering, the SCXIbus MISO line to the
SERDATOUT pin of the rear signal connector. In this setting, along with
the proper setting of W32, the data acquisition board can read the Module
ID Register of the SCXI-1121. See the Timing Requirements and
Communication Protocol section later in this chapter, and Chapter 4,
Register Descriptions, for information on reading the Module ID Register.
See Appendix E, SCXI-1121 Cabling, for the pin equivalences of the
SCXI-1121 rear signal connector and the data acquisition board I/O
connector. This is the factory-default setting.
Position 3 disconnects SERDATOUT from the SCXIbus MISO line.
Jumper W32
On Revision A and B modules, jumper W32 should not be connected. On
Revision C or later modules, Position 1 connects a 2.2 kΩ pullup resistor
to the SERDATOUT line (factory-default setting), and Position 3 does not
connect the pullup resistor to the SERDATOUT line.
Using Jumpers W32 and W38
Set jumpers W32 and W38 as follows:
If the SCXI-1121 is not cabled to a data acquisition board, the positions of
these jumpers do not matter, so leave them in their factory default positions
(both in position 1).
If the SCXI-1121 is cabled to a data acquisition board, and the SCXI
chassis that the SCXI-1121 is in, is the only SCXI chassis cabled to that
data acquisition board, leave the jumpers in their factory default positions
(both in position 1).
If the SCXI-1121 is cabled to a data acquisition board, and there are
multiple SCXI chassis cabled to that data acquisition board with shielded
cables (you are using SCXI-1346 shielded cable multi-chassis adapters),
leave the jumpers in their factory default positions (both in position 1).
If the SCXI-1121 is cabled to a data acquisition board, and there are
multiple SCXI chassis cabled to that data acquisition board with ribbon
cables (you are using SCXI-1350 multi-chassis adapters), leave jumper