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CompactDAQ cDAQ-917 Series
NI CompactDAQ cDAQ-917 Series User Manual
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Appendix B
T
e
chnical Support and Prof
essional Services
Y
ou also can visit the W
orldwide Offices section of
ni.com/niglobal
to
access the branch
office W
eb sites, which provid
e up-to-date contact informati
on, support phone numbers, email
addresses, and current events.
98
100
Table of Contents
Default Chapter
5
Table of Contents
5
Chapter 1
10
Getting Started with the Cdaq Chassis
10
Safety Guidelines
11
Safety Guidelines for Hazardous Voltages
12
Electromagnetic Compatibility Guidelines
12
Unpacking
13
Installing the Cdaq Chassis
14
Mounting the Cdaq Chassis
16
Using the Cdaq Chassis on a Desktop
16
NI 9901 Desktop Kit for ni Cdaq-9174/9178 Chassis
16
Mounting the Cdaq Chassis on a Panel
17
NI Cdaq-9171
17
NI Cdaq-9174/9178
17
Mounting the ni Cdaq-9174/9178 on a DIN Rail
19
NI Cdaq Chassis Features
20
Chassis Grounding Screw
20
USB Cable Strain Relief
21
Leds
21
Power Connector
22
TRIG (PFI) BNC Connectors
22
Cables and Accessories
22
Removing I/O Modules from the Chassis
22
Using the Cdaq Chassis
23
C Series I/O Module
23
Parallel Versus Serial DIO Modules
24
Cdaq Module Interface
24
Stc3
24
Chapter 2
26
Analog Input
26
Analog Input Triggering Signals
26
Analog Input Timing Signals
26
AI Sample Clock Signal
27
Routing the Sample Clock to an Output Terminal
27
AI Sample Clock Timebase Signal
27
AI Convert Clock Signal Behavior for Analog Input Modules
27
Scanned Modules
28
Simultaneous Sample-And-Hold Modules
28
Sigma-Delta Modules
28
Slow Sample Rate Modules
29
AI Start Trigger Signal
30
Using a Digital Source
30
Using an Analog Source
30
Routing AI Start Trigger to an Output Terminal
30
AI Reference Trigger Signal
30
Using a Digital Source
31
Using an Analog Source
31
Routing the Reference Trigger Signal to an Output Terminal
32
AI Pause Trigger Signal
32
Using a Digital Source
32
Using an Analog Source
32
Getting Started with AI Applications in Software
32
Chapter 3
33
Analog Output
33
Analog Output Data Generation Methods
33
Software-Timed Generations
33
Hardware-Timed Generations
34
Buffered Analog Output
34
Analog Output Triggering Signals
35
Analog Output Timing Signals
35
AO Sample Clock Signal
35
Routing AO Sample Clock to an Output Terminal
36
AO Sample Clock Timebase Signal
36
AO Start Trigger Signal
36
Using a Digital Source
36
Using an Analog Source
36
Routing AO Start Trigger Signal to an Output Terminal
36
AO Pause Trigger Signal
37
Using a Digital Source
37
Using an Analog Source
37
Minimizing Glitches on the Output Signal
38
Getting Started with AO Applications in Software
38
Chapter 4
39
Digital Input/Output and PFI
39
Digital Input/Output
39
Serial DIO Versus Parallel DIO Modules
39
Static DIO
39
Digital Input
40
Digital Input Triggering Signals
40
Digital Input Timing Signals
40
Digital Input Filters
44
Getting Started with DI Applications in Software
45
Change Detection Event
45
Routing Change Detection Event to an Output Terminal
45
Change Detection Acquisition
45
Digital Output
46
Digital Output Data Generation Methods
46
Digital Output Triggering Signals
47
Digital Output Timing Signals
48
Getting Started with DO Applications in Software
51
Digital Input/Output Configuration for ni 9401
51
Pfi
51
PFI Filters
51
Chapter 5
53
Counters
53
Counter Timing Engine
53
Counter Input Applications
55
Counting Edges
55
Single Point (On-Demand) Edge Counting
55
Buffered (Sample Clock) Edge Counting
56
Controlling the Direction of Counting
56
Pulse-Width Measurement
57
Single Pulse-Width Measurement
57
Implicit Buffered Pulse-Width Measurement
57
Sample Clocked Buffered Pulse-Width Measurement
58
Pulse Measurement
59
Single Pulse Measurement
59
Implicit Buffered Pulse Measurement
59
Sample Clocked Buffered Pulse Measurement
60
Semi-Period Measurement
60
Single Semi-Period Measurement
61
Implicit Buffered Semi-Period Measurement
61
Pulse Versus Semi-Period Measurements
62
Frequency Measurement
62
Low Frequency with One Counter
62
High Frequency with Two Counters
63
Large Range of Frequencies with Two Counters
64
Sample Clocked Buffered Frequency Measurement
65
Choosing a Method for Measuring Frequency
66
Which Method Is Best
67
Period Measurement
69
Position Measurement
70
Measurements Using Quadrature Encoders
70
Channel Z Behavior
71
Measurements Using Two Pulse Encoders
72
Buffered (Sample Clock) Position Measurement
72
Two-Signal Edge-Separation Measurement
73
Single Two-Signal Edge-Separation Measurement
73
Implicit Buffered Two-Signal Edge-Separation Measurement
74
Sample Clocked Buffered Two-Signal Separation Measurement
74
Counter Output Applications
75
Simple Pulse Generation
75
Single Pulse Generation
75
Single Pulse Generation with Start Trigger
76
Pulse Train Generation
76
Finite Pulse Train Generation
77
Retriggerable Pulse or Pulse Train Generation
77
Continuous Pulse Train Generation
78
Buffered Pulse Train Generation
79
Finite Implicit Buffered Pulse Train Generation
79
Continuous Buffered Implicit Pulse Train Generation
80
Finite Buffered Sample Clocked Pulse Train Generation
80
Continuous Buffered Sample Clocked Pulse Train Generation
81
Frequency Generation
81
Using the Frequency Generator
82
Frequency Division
83
Pulse Generation for ETS
83
Counter Timing Signals
84
Counter N Source Signal
84
Routing a Signal to Counter N Source
85
Routing Counter N Source to an Output Terminal
85
Counter N Gate Signal
85
Routing a Signal to Counter N Gate
85
Routing Counter N Gate to an Output Terminal
86
Counter N aux Signal
86
Routing a Signal to Counter N aux
86
Counter N A, Counter N B, and Counter N Z Signals
86
Routing Signals to A, B, and Z Counter Inputs
86
Routing Counter N Z Signal to an Output Terminal
86
Counter N Up_Down Signal
87
Counter N HW Arm Signal
87
Routing Signals to Counter N HW Arm Input
87
Counter N Sample Clock Signal
87
Using an Internal Source
88
Using an External Source
88
Routing Counter N Sample Clock to an Output Terminal
88
Counter N Internal Output and Counter N TC Signals
88
Routing Counter N Internal Output to an Output Terminal
88
Frequency Output Signal
88
Routing Frequency Output to a Terminal
89
Default Counter/Timer Routing
89
Counter Triggering
89
Other Counter Features
90
Cascading Counters
90
Prescaling
90
Synchronization Modes
90
80 Mhz Source Mode
91
External or Internal Source Less than 20 Mhz
91
Chapter 6
92
Digital Routing and Clock Generation
92
Digital Routing
92
Clock Routing
92
80 Mhz Timebase
92
20 Mhz Timebase
93
100 Khz Timebase
93
Appendix A Where to Go from here
94
4
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NI CompactDAQ cDAQ-917 Series Specifications
General
Brand
NI
Model
CompactDAQ cDAQ-917 Series
Category
Chassis
Language
English
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