National Instruments 776572-21 Manuals

Manuals and User Guides for National Instruments 776572-21. We have 1 National Instruments 776572-21 manual available for free PDF download: User Manual

National Instruments 776572-21 User Manual (159 pages)

Brand: National Instruments | Category: Terminal Block | Size: 4 MB

Table of Contents
5
About this Manual
10
Conventions
10
Related Documentation
11
Introduction
12
Optional Software
13
What Your Kit Should Contain
13
Optional Equipment
15
Custom Cables
16
Unpacking
17
Configuration and Installation
18
Module Configuration
18
Figure 2-1. SCXI-1121 General Parts Locator Diagram
19
Figure 2-2. SCXI-1121 Detailed Parts Locator Diagram
20
Digital Signal Connections
21
Jumper W44
21
Jumper W32
22
Jumper W38
22
Using Jumpers W32 and W38
22
Table 2-1. Digital Signal Connections, Jumper Settings
23
Analog Configuration
24
Grounding, Shielding, and Reference Mode Selection
24
Table 2-2. Jumper W33 Settings
25
Input Channel Jumpers
26
Table 2-3. Gain Jumper Allocation
26
Table 2-4. Gain Jumper Positions
26
Excitation Jumpers
27
Table 2-5. Filter Jumper Allocation
27
Table 2-6. Voltage and Current Mode Excitation Jumper Setup
28
Table 2-7. Maximum Load Per Excitation Channel
28
Table 2-8. Excitation Level Jumper Selection
29
Table 2-9. Completion Network Jumpers
30
Hardware Installation
31
Front Connector
32
Signal Connections
32
Figure 2-3. SCXI-1121 Front Connector Pin Assignment
33
Front Connector Signal Descriptions
34
Analog Input Channels
36
Figure 2-4. Ground-Referenced Signal Connection with High Common-Mode Voltage
36
Figure 2-5. Floating Signal Connection Referenced to Chassis Ground for
36
Figure 2-6. Floating AC-Coupled Signal Connection
37
Figure 2-7. AC-Coupled Signal Connection with High Common-Mode Voltage
37
Excitation Channels
38
Temperature Sensor Connection
38
Connector-And-Shell Assembly
39
SCXI-1320, SCXI-1328, and SCXI-1321 Terminal Blocks
40
Table 2-10. Trimmer Potentiometer and Corresponding Channel
42
Table 2-11. Nulling Resistors and Corresponding Channel
42
Table 2-12. Jumper Settings of the Nulling Circuits
44
Table 2-13. Jumper Settings on the SCXI-1320 Terminal Block
48
Table 2-14. Jumper Settings on the SCXI-1328 Terminal Block
48
Table 2-15. Jumper Settings on the SCXI-1321 Terminal Block
49
Rear Signal Connector
53
Rear Signal Connector Signal Descriptions
54
Analog Output Signal Connections
55
Digital I/O Signal Connections
56
Table 2-16. Scxibus to SCXI-1121 Rear Signal Connector to Data Acquisition
57
Timing Requirements and Communication Protocol
57
Communication Signals
58
Functional Overview
63
Theory of Operation
63
Scxibus Connector
65
Scxibus Connector Signal Descriptions
66
Table 3-1. Scxibus Equivalents for the Rear Signal Connector
67
Digital Interface
68
Digital Control Circuitry
69
Analog and Timing Circuitry
70
Analog Input Channels
70
Calibration
73
Excitation Output Channels
73
Analog Output Circuitry
74
Multiplexed Scanning
76
Scanning Modes
76
Single-Module Parallel Scanning
76
Single-Module Multiplexed Scanning
77
Multiple-Module Multiplexed Scanning
78
Multiple-Chassis Scanning
79
Register Description
80
Register Description Format
80
Register Descriptions
80
SCXI-1121 Registers
80
Slot 0 Register Descriptions
84
Notation
89
Programming
89
Programming Considerations
89
Register Writes
89
Register Selection and Write Procedure
90
Table 5-1. SCXI-1121 Rear Signal Connector Pin Equivalences
90
Direct Measurements
92
Initialization
92
Single-Channel Measurements
92
Indirect Measurements
93
Data Acquisition Board Setup Programming
95
Scanning Measurements
95
Module Programming
98
Programming the Slot 0 Hardscan Circuitry
101
Acquisition Enable, Triggering, and Servicing
103
Example 1
103
Scanning Examples
103
Example 2
104
Example 3
105
Appendix A Specifications

108
Appendix B Rear Signal Connector

113

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National Instruments 776572-21 Manuals

National Instruments 776572-21 User Manual (159 pages)

Table of Contents

Appendix A Specifications

Appendix B Rear Signal Connector

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