NI DAQ M Series Manuals

Manuals and User Guides for NI DAQ M Series. We have 1 NI DAQ M Series manual available for free PDF download: User Manual

NI DAQ M Series User Manual (163 pages)

Isolated Current Input/Voltage Output Devices

Brand: NI | Category: I/O Systems | Size: 2 MB

Table of Contents
5
About this Manual
12
Conventions
12
Ni-Daq
13
NI-Daqmx for Linux
13
Related Documentation
13
Labview
14
NI-Daqmx Base
14
ANSI C Without ni Application Software
15
Labwindows ™ /CVI
15
Measurement Studio
15
NET Languages Without ni Application Software
15
Device Documentation and Specifications
16
Technical Support on the Web
16
Training Courses
16
Device Pinouts
17
Getting Started
17
Installing NI-Daqmx
17
Installing Other Software
17
Installing the Hardware
17
Device Accessories and Cables
18
Device Specifications
18
DAQ Hardware
19
DAQ System Overview
19
Daq-Stc2
20
Calibration Circuitry
21
Sensors and Transducers
21
Cables and Accessories
22
Custom Cabling
22
Programming Devices in Software
23
Connector Information
24
I/O Connector Signal Descriptions
24
RTSI Connector Pinout
25
Analog Input
26
Analog Input Circuitry
26
Analog Input Range
27
Connecting Analog Current Input Signals
28
Method 1
28
Method 2
29
Analog Input Ground-Reference Settings
30
Configuring AI Ground-Reference Settings in Software
32
Minimize Current Step between Adjacent Channels
33
Multichannel Scanning Considerations
33
Use Short High-Quality Cabling
33
Avoid Scanning Faster than Necessary
34
Example 1
34
Example 2
34
Analog Input Data Acquisition Methods
35
Buffered
35
Hardware-Timed Acquisitions
35
Software-Timed Acquisitions
35
Analog Input Triggering
36
Field Wiring Considerations
36
Non-Buffered
36
Analog Input Timing Signals
37
AI Sample Clock Signal
40
Using an External Source
40
Using an Internal Source
40
Other Timing Requirements
41
Routing AI Sample Clock Signal to an Output Terminal
41
AI Convert Clock Signal
42
AI Sample Clock Timebase Signal
42
Routing AI Convert Clock Signal to an Output Terminal
43
Using an External Source
43
Using an Internal Source
43
Other Timing Requirements
44
Using a Delay from Sample Clock to Convert Clock
44
AI Convert Clock Timebase Signal
45
AI Hold Complete Event Signal
45
AI Start Trigger Signal
46
Routing AI Start Trigger to an Output Terminal
46
Using a Digital Source
46
AI Reference Trigger Signal
47
AI Pause Trigger Signal
48
Routing AI Reference Trigger Signal to an Output Terminal
48
Using a Digital Source
48
Getting Started with AI Applications in Software
49
Routing AI Pause Trigger Signal to an Output Terminal
49
Analog Output
50
Analog Output Circuitry
50
Analog Output Data Generation Methods
51
Minimizing Glitches on the Output Signal
51
Software-Timed Generations
51
Buffered
52
Hardware-Timed Generations
52
Non-Buffered
52
Analog Output Triggering
53
Connecting Analog Voltage Output Signals
53
Analog Output Timing Signals
54
AO Start Trigger Signal
55
Using a Digital Source
55
AO Pause Trigger Signal
56
Routing AO Start Trigger Signal to an Output Terminal
56
AO Sample Clock Signal
57
Routing AO Pause Trigger Signal to an Output Terminal
57
Using a Digital Source
57
Other Timing Requirements
58
Routing AO Sample Clock Signal to an Output Terminal
58
Using an External Source
58
Using an Internal Source
58
AO Sample Clock Timebase Signal
59
Getting Started with AO Applications in Software
60
Digital Input and Output
61
I/O Protection
61
Connecting Digital I/O Signals
62
Programmable Power-Up States
62
Getting Started with DIO Applications in Software
63
Counter Input Applications
65
Counters
65
Counting Edges
65
Single Point (On-Demand) Edge Counting
65
Buffered (Sample Clock) Edge Counting
66
Controlling the Direction of Counting
67
Non-Cumulative Buffered Edge Counting
67
Buffered Pulse-Width Measurement
68
Pulse-Width Measurement
68
Single Pulse-Width Measurement
68
Period Measurement
69
Buffered Period Measurement
70
Single Period Measurement
70
Semi-Period Measurement
71
Single Semi-Period Measurement
71
Buffered Semi-Period Measurement
72
Frequency Measurement
72
Method 1-Measure Low Frequency with One Counter
72
Method 1B-Measure Low Frequency with One Counter (Averaged)
73
Method 2-Measure High Frequency with Two Counters
74
Method 3-Measure Large Range of Frequencies Using Two Counters
75
Choosing a Method for Measuring Frequency
76
Measurements Using Quadrature Encoders
78
Position Measurement
78
Measurements Using Two Pulse Encoders
80
Single Two-Signal Edge-Separation Measurement
81
Two-Signal Edge-Separation Measurement
81
Buffered Two-Signal Edge-Separation Measurement
82
Counter Output Applications
83
Simple Pulse Generation
83
Single Pulse Generation
83
Single Pulse Generation with Start Trigger
83
Retriggerable Single Pulse Generation
84
Continuous Pulse Train Generation
85
Pulse Train Generation
85
Frequency Generation
86
Using the Frequency Generator
86
Frequency Division
87
Pulse Generation for ETS
87
Counter N Source Signal
88
Counter Timing Signals
88
Routing a Signal to Counter N Source
89
Routing Counter N Source to an Output Terminal
89
Counter N aux Signal
90
Counter N Gate Signal
90
Routing a Signal to Counter N aux
90
Routing a Signal to Counter N Gate
90
Routing Counter N Gate to an Output Terminal
90
Counter N A, Counter N B, and Counter N Z Signals
91
Counter N HW Arm Signal
91
Routing Counter N Z Signal to an Output Terminal
91
Routing Signals to A, B, and Z Counter Inputs
91
Counter N Internal Output and Counter N TC Signals
92
Frequency Output Signal
92
Routing Counter N Internal Output to an Output Terminal
92
Routing Frequency Output to a Terminal
92
Routing Signals to Counter N HW Arm Input
92
Default Counter Terminals
93
Arm Start Trigger
94
Counter Triggering
94
Pause Trigger
94
Start Trigger
94
Cascading Counters
95
Counter Filters
95
Other Counter Features
95
Prescaling
96
Duplicate Count Prevention
97
Example Application that Works Correctly (no Duplicate Counting)
97
Example Application that Prevents Duplicate Count
98
Example Application that Works Incorrectly (Duplicate Counting)
98
When to Use Duplicate Count Prevention
99
Enabling Duplicate Count Prevention in NI-Daqmx
100
Synchronization Modes
100
80 Mhz Source Mode
101
External Source Mode
101
Other Internal Source Mode
101
Pfi
102
Using PFI Terminals as Timing Input Signals
103
Connecting PFI Input Signals
104
Exporting Timing Output Signals Using PFI Terminals
104
Using PFI Terminals as Static Digital Inputs and Outputs
104
PFI Filters
105
I/O Protection
107
Programmable Power-Up States
107
Isolation and Digital Isolators
108
Benefits of an Isolated DAQ Device
109
Digital Isolation
109
Reducing Common-Mode Noise
109
Creating an AC Return Path
110
Isolated Systems
110
Non-Isolated Systems
110
Clock Routing
111
Digital Routing and Clock Generation
111
100 Khz Timebase
112
80 Mhz Timebase
112
External Reference Clock
112
10 Mhz Reference Clock
113
Real-Time System Integration Bus (RTSI)
113
Synchronizing Multiple Devices
113
RTSI Connector Pinout
114
Using RTSI as Outputs
115
RTSI Filters
116
Using RTSI Terminals as Timing Input Signals
116
PXI Clock and Trigger Signals
118
PXI Triggers
118
PXI_STAR Filters
119
Bus Interface
121
DMA Controllers
121
PXI and PXI Express
122
PXI Clock and Trigger Signals
122
PXI Considerations
122
Data Transfer Methods
123
Direct Memory Access (DMA)
123
Using PXI with Compactpci
123
Changing Data Transfer Methods between DMA and IRQ
124
Interrupt Request (IRQ)
124
Programmed I/O
124
Triggering
125
Triggering with a Digital Source
125
NI 6236 Device Information
127
NI 6236 Pinout
127
NI 6236 Accessory and Cabling Options
129
NI 6236 Specifications
129
Appendix B Troubleshooting

131
- Analog Input
  131
- Counters
  133
- Technical Support and Professional Services
  134
- Glossary
  136

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