National Instruments USB-621 Series Manuals

Manuals and User Guides for National Instruments USB-621 Series. We have 2 National Instruments USB-621 Series manuals available for free PDF download: User Manual

National Instruments USB-621 Series User Manual (205 pages)

Brand: National Instruments | Category: I/O Systems | Size: 6.05 MB

Table of Contents
5
About this Manual
13
Conventions
13
Related Documentation
14
Getting Started
19
Installing NI-Daqmx
19
Installing Other Software
19
Installing the Hardware
19
Device Pinouts
20
Device Self-Calibration
20
Device Specifications
20
Applying Signal Labels to the USB-621X
21
USB Cable Strain Relief
22
Desktop Use
24
DIN Rail Mounting
24
Mounting the USB-621X
24
Panel Mounting
25
USB Device Security Cable Slot
26
DAQ Hardware
27
DAQ System Overview
27
Calibration Circuitry
28
Daq-Stc2
28
Sensors and Transducers
29
Signal Conditioning
29
Cables and Accessories
30
USB-621X Mass Termination Custom Cabling
30
Programming Devices in Software
31
Connector and LED Information
32
I/O Connector Signal Descriptions
32
+5 V Power
34
+5 V Power as an Input
34
+5 V Power as an Output
34
USB Chassis Ground
35
USB Device Fuse Replacement
35
PWR/ACT LED Indicator
37
Analog Input
38
Analog Input Range
39
Analog Input Ground-Reference Settings
40
Configuring AI Ground-Reference Settings in Software
42
Multichannel Scanning Considerations
42
Analog Input Data Acquisition Methods
45
Analog Input Digital Triggering
47
Field Wiring Considerations
47
Analog Input Timing Signals
48
AI Sample Clock Signal
51
Other Timing Requirements
51
Routing AI Sample Clock to an Output Terminal
51
Using an External Source
51
Using an Internal Source
51
AI Sample Clock Timebase Signal
52
AI Convert Clock Signal
53
Routing AI Convert Clock to an Output Terminal
53
Using an External Source
53
Using an Internal Source
53
Other Timing Requirements
54
Using a Delay from Sample Clock to Convert Clock
54
AI Convert Clock Timebase Signal
56
AI Hold Complete Event Signal
56
AI Start Trigger Signal
57
Routing AI Start Trigger to an Output Terminal
57
Using a Digital Source
57
AI Reference Trigger Signal
58
AI Pause Trigger Signal
59
Getting Started with AI Applications in Software
59
Routing AI Reference Trigger to an Output Terminal
59
Using a Digital Source
59
Connecting Analog Input Signals on USB-6210/6211/6212 Devices
60
Connecting Floating Signal Sources
62
What Are Floating Signal Sources
62
When to Use Differential Connections with Floating Signal Sources
62
When to Use Referenced Single-Ended Connections with Floating Signal Sources
62
When to Use Non-Referenced Single-Ended Connections with Floating Signal Sources
63
Using Differential Connections for Floating Signal Sources
64
Using Non-Referenced Single-Ended Connections for Floating Signal Sources
67
Connecting Ground-Referenced Signal Sources
68
Using Referenced Single-Ended Connections for Floating Signal Sources
68
What Are Ground-Referenced Signal Sources
68
When to Use Differential Connections with Ground-Referenced Signal Sources
69
When to Use Non-Referenced Single-Ended Connections with Ground-Referenced Signal Sources
69
When to Use Referenced Single-Ended Connections with Ground-Referenced Signal Sources
70
Using Differential Connections for Ground-Referenced Signal Sources
71
Using Non-Referenced Single-Ended Connections for Ground-Referenced Signal Sources
72
Connecting Analog Input Signals on USB-6215/6216/6218 Devices
73
Taking Differential Measurements
73
Taking Referenced Single-Ended Measurements
74
Taking Non-Referenced Single-Ended Measurements
75
Analog Output
76
Analog Output Data Generation Methods
77
AO Range
77
Minimizing Glitches on the Output Signal
77
Analog Output Digital Triggering
79
Connecting Analog Output Signals
79
Analog Output Timing Signals
80
AO Start Trigger Signal
80
Using a Digital Source
80
AO Pause Trigger Signal
81
Routing AO Start Trigger to an Output Terminal
81
Using a Digital Source
82
AO Sample Clock Signal
83
Other Timing Requirements
83
Routing AO Sample Clock to an Output Terminal
83
Using an External Source
83
Using an Internal Source
83
AO Sample Clock Timebase Signal
84
Getting Started with AO Applications in Software
85
Digital I/O
86
Digital I/O on USB-6210/6211/6215/6218 Devices
86
I/O Protection on USB-6210/6211/6215/6218 Devices
87
Static DIO on USB-6210/6211/6215/6218 Devices
87
Connecting Digital I/O Signals on USB-6210/6211/6215/6218 Devices
88
Increasing Current Drive on USB-6210/6211/6215/6218 Devices
88
Digital I/O on USB-6212/6216 Devices
89
Getting Started with DIO Applications in Software on USB-6210/6211/6215/6218 Devices
89
I/O Protection on USB-6212/6216 Devices
90
Static DIO on USB-6212/6216 Devices
90
Connecting Digital I/O Signals on USB-6212/6216 Devices
91
Increasing Current Drive on USB-6212/6216 Devices
91
Programmable Power-Up States on USB-6212/6216 Devices
91
Getting Started with DIO Applications in Software on USB-6212/6216 Devices
92
Pfi
93
Using PFI Terminals as Timing Input Signals
94
Exporting Timing Output Signals Using PFI Terminals
95
Using PFI Terminals as Static Digital I/Os
95
Connecting PFI Input Signals
96
PFI Filters
96
I/O Protection
98
Programmable Power-Up States
98
Counter Input Applications
100
Counters
100
Counting Edges
100
Single Point (On-Demand) Edge Counting
100
Buffered (Sample Clock) Edge Counting
101
Controlling the Direction of Counting
102
Pulse-Width Measurement
102
Single Pulse-Width Measurement
102
Buffered Pulse-Width Measurement
103
Period Measurement
104
Single Period Measurement
104
Buffered Period Measurement
105
Semi-Period Measurement
106
Single Semi-Period Measurement
106
Buffered Semi-Period Measurement
107
Frequency Measurement
108
Choosing a Method for Measuring Frequency
112
Position Measurement
113
Measurements Using Quadrature Encoders
114
Buffered (Sample Clock) Position Measurement
116
Measurements Using Two Pulse Encoders
116
Two-Signal Edge-Separation Measurement
117
Buffered Two-Signal Edge-Separation Measurement
118
Single Two-Signal Edge-Separation Measurement
118
Counter Output Applications
119
Simple Pulse Generation
119
Single Pulse Generation
119
Retriggerable Single Pulse Generation
120
Single Pulse Generation with Start Trigger
120
Continuous Pulse Train Generation
121
Pulse Train Generation
121
Finite Pulse Train Generation
122
Frequency Generation
123
Using the Frequency Generator
123
Frequency Division
124
Pulse Generation for ETS
124
Counter Timing Signals
125
Counter N Source Signal
126
Routing a Signal to Counter N Source
126
Routing Counter N Source to an Output Terminal
126
Counter N aux Signal
127
Counter N Gate Signal
127
Routing a Signal to Counter N aux
127
Routing a Signal to Counter N Gate
127
Routing Counter N Gate to an Output Terminal
127
Counter N A, Counter N B, and Counter N Z Signals
128
Counter N HW Arm Signal
128
Counter N Up_Down Signal
128
Routing Signals to A, B, and Z Counter Inputs
128
Counter N Internal Output and Counter N TC Signals
129
Frequency Output Signal
129
Routing Counter N Internal Output to an Output Terminal
129
Routing Frequency Output to a Terminal
129
Routing Signals to Counter N HW Arm Input
129
Default Counter/Timer Pinouts
130
Counter Triggering
131
Other Counter Features
132
Sample Clock
132
Cascading Counters
133
Counter Filters
133
Prescaling
134
Duplicate Count Prevention
135
Example Application that Works Correctly (no Duplicate Counting)
135
Example Application that Prevents Duplicate Count
136
Example Application that Works Incorrectly (Duplicate Counting)
136
Enabling Duplicate Count Prevention in NI-Daqmx
137
Isolation and Digital Isolators on USB-6215/6216/6218 Devices
138
Benefits of an Isolated DAQ Device
139
Digital Isolation
139
Creating an AC Return Path
140
Reducing Common-Mode Noise
140
Isolated Systems
141
Non-Isolated Systems
141
100 Khz Timebase
142
80 Mhz Timebase
142
Digital Routing and Clock Generation
142
Bus Interface
143
Data Transfer Methods
143
USB Signal Stream
143
Changing Data Transfer Methods
144
Triggering
145
Triggering with a Digital Source
145
Device-Specific Information
147
Usb-6210
148
Usb-6211/6215
150
USB-6212/6216 Screw Terminal
152
USB-6212/6216 Mass Termination
154
Usb-6212/6216 Bnc
159
USB-6218 Screw Terminal
165
Usb-6218 Bnc
167
Appendix B Troubleshooting

173

National Instruments USB-621 Series User Manual (204 pages)

Bus-Powered USB Devices

Brand: National Instruments | Category: Measuring Instruments | Size: 6.71 MB

Table of Contents
4
About this Manual
12
Conventions
12
Related Documentation
13
Getting Started
18
Installing NI-Daqmx
18
Installing Other Software
18
Installing the Hardware
18
Device Pinouts
19
Device Self-Calibration
19
Device Specifications
19
Applying Signal Labels to the USB-621X
20
USB Cable Strain Relief
21
Desktop Use
23
DIN Rail Mounting
23
Mounting the USB-621X
23
Panel Mounting
24
USB Device Security Cable Slot
25
DAQ Hardware
26
DAQ System Overview
26
Calibration Circuitry
27
Daq-Stc2
27
Sensors and Transducers
28
Signal Conditioning
28
Cables and Accessories
29
USB-621X Mass Termination Custom Cabling
29
Programming Devices in Software
30
Connector and LED Information
31
I/O Connector Signal Descriptions
31
+5 V Power
33
+5 V Power as an Input
33
+5 V Power as an Output
33
USB Chassis Ground
34
USB Device Fuse Replacement
34
PWR/ACT LED Indicator
36
Analog Input
37
Analog Input Range
38
Analog Input Ground-Reference Settings
39
Configuring AI Ground-Reference Settings in Software
41
Multichannel Scanning Considerations
41
Analog Input Data Acquisition Methods
44
Analog Input Digital Triggering
46
Field Wiring Considerations
46
Analog Input Timing Signals
47
AI Sample Clock Signal
50
Other Timing Requirements
50
Routing AI Sample Clock to an Output Terminal
50
Using an External Source
50
Using an Internal Source
50
AI Sample Clock Timebase Signal
51
AI Convert Clock Signal
52
Routing AI Convert Clock to an Output Terminal
52
Using an External Source
52
Using an Internal Source
52
Other Timing Requirements
53
Using a Delay from Sample Clock to Convert Clock
53
AI Convert Clock Timebase Signal
55
AI Hold Complete Event Signal
55
AI Start Trigger Signal
56
Routing AI Start Trigger to an Output Terminal
56
Using a Digital Source
56
AI Reference Trigger Signal
57
AI Pause Trigger Signal
58
Getting Started with AI Applications in Software
58
Routing AI Reference Trigger to an Output Terminal
58
Using a Digital Source
58
Connecting Analog Input Signals on USB-6210/6211/6212 Devices
59
Connecting Floating Signal Sources
61
What Are Floating Signal Sources
61
When to Use Differential Connections with Floating Signal Sources
61
When to Use Referenced Single-Ended Connections with Floating Signal Sources
61
When to Use Non-Referenced Single-Ended Connections with Floating Signal Sources
62
Using Differential Connections for Floating Signal Sources
63
Using Non-Referenced Single-Ended Connections for Floating Signal Sources
66
Connecting Ground-Referenced Signal Sources
67
Using Referenced Single-Ended Connections for Floating Signal Sources
67
What Are Ground-Referenced Signal Sources
67
When to Use Differential Connections with Ground-Referenced Signal Sources
68
When to Use Non-Referenced Single-Ended Connections with Ground-Referenced Signal Sources
68
When to Use Referenced Single-Ended Connections with Ground-Referenced Signal Sources
69
Using Differential Connections for Ground-Referenced Signal Sources
70
Using Non-Referenced Single-Ended Connections for Ground-Referenced Signal Sources
71
Connecting Analog Input Signals on USB-6215/6216/6218 Devices
72
Taking Differential Measurements
72
Taking Referenced Single-Ended Measurements
73
Taking Non-Referenced Single-Ended Measurements
74
Analog Output
75
Analog Output Data Generation Methods
76
AO Range
76
Minimizing Glitches on the Output Signal
76
Analog Output Digital Triggering
78
Connecting Analog Output Signals
78
Analog Output Timing Signals
79
AO Start Trigger Signal
79
Using a Digital Source
79
AO Pause Trigger Signal
80
Routing AO Start Trigger to an Output Terminal
80
Using a Digital Source
81
AO Sample Clock Signal
82
Other Timing Requirements
82
Routing AO Sample Clock to an Output Terminal
82
Using an External Source
82
Using an Internal Source
82
AO Sample Clock Timebase Signal
83
Getting Started with AO Applications in Software
84
Digital I/O
85
Digital I/O on USB-6210/6211/6215/6218 Devices
85
I/O Protection on USB-6210/6211/6215/6218 Devices
86
Static DIO on USB-6210/6211/6215/6218 Devices
86
Connecting Digital I/O Signals on USB-6210/6211/6215/6218 Devices
87
Increasing Current Drive on USB-6210/6211/6215/6218 Devices
87
Digital I/O on USB-6212/6216 Devices
88
Getting Started with DIO Applications in Software on USB-6210/6211/6215/6218 Devices
88
I/O Protection on USB-6212/6216 Devices
89
Static DIO on USB-6212/6216 Devices
89
Connecting Digital I/O Signals on USB-6212/6216 Devices
90
Increasing Current Drive on USB-6212/6216 Devices
90
Programmable Power-Up States on USB-6212/6216 Devices
90
Getting Started with DIO Applications in Software on USB-6212/6216 Devices
91
Pfi
92
Using PFI Terminals as Timing Input Signals
93
Exporting Timing Output Signals Using PFI Terminals
94
Using PFI Terminals as Static Digital I/Os
94
Connecting PFI Input Signals
95
PFI Filters
95
I/O Protection
97
Programmable Power-Up States
97
Counter Input Applications
99
Counters
99
Counting Edges
99
Single Point (On-Demand) Edge Counting
99
Buffered (Sample Clock) Edge Counting
100
Controlling the Direction of Counting
101
Pulse-Width Measurement
101
Single Pulse-Width Measurement
101
Buffered Pulse-Width Measurement
102
Period Measurement
103
Single Period Measurement
103
Buffered Period Measurement
104
Semi-Period Measurement
105
Single Semi-Period Measurement
105
Buffered Semi-Period Measurement
106
Frequency Measurement
107
Choosing a Method for Measuring Frequency
111
Position Measurement
112
Measurements Using Quadrature Encoders
113
Buffered (Sample Clock) Position Measurement
115
Measurements Using Two Pulse Encoders
115
Two-Signal Edge-Separation Measurement
116
Buffered Two-Signal Edge-Separation Measurement
117
Single Two-Signal Edge-Separation Measurement
117
Counter Output Applications
118
Simple Pulse Generation
118
Single Pulse Generation
118
Retriggerable Single Pulse Generation
119
Single Pulse Generation with Start Trigger
119
Continuous Pulse Train Generation
120
Pulse Train Generation
120
Finite Pulse Train Generation
121
Frequency Generation
122
Using the Frequency Generator
122
Frequency Division
123
Pulse Generation for ETS
123
Counter Timing Signals
124
Counter N Source Signal
125
Routing a Signal to Counter N Source
125
Routing Counter N Source to an Output Terminal
125
Counter N aux Signal
126
Counter N Gate Signal
126
Routing a Signal to Counter N aux
126
Routing a Signal to Counter N Gate
126
Routing Counter N Gate to an Output Terminal
126
Counter N A, Counter N B, and Counter N Z Signals
127
Counter N HW Arm Signal
127
Counter N Up_Down Signal
127
Routing Signals to A, B, and Z Counter Inputs
127
Counter N Internal Output and Counter N TC Signals
128
Frequency Output Signal
128
Routing Counter N Internal Output to an Output Terminal
128
Routing Frequency Output to a Terminal
128
Routing Signals to Counter N HW Arm Input
128
Default Counter/Timer Pinouts
129
Counter Triggering
130
Other Counter Features
131
Sample Clock
131
Cascading Counters
132
Counter Filters
132
Prescaling
133
Duplicate Count Prevention
134
Example Application that Works Correctly (no Duplicate Counting)
134
Example Application that Prevents Duplicate Count
135
Example Application that Works Incorrectly (Duplicate Counting)
135
Enabling Duplicate Count Prevention in NI-Daqmx
136
Isolation and Digital Isolators on USB-6215/6216/6218 Devices
137
Benefits of an Isolated DAQ Device
138
Digital Isolation
138
Creating an AC Return Path
139
Reducing Common-Mode Noise
139
Isolated Systems
140
Non-Isolated Systems
140
100 Khz Timebase
141
80 Mhz Timebase
141
Digital Routing and Clock Generation
141
Bus Interface
142
Data Transfer Methods
142
USB Signal Stream
142
Changing Data Transfer Methods
143
Triggering
144
Triggering with a Digital Source
144
Device-Specific Information
146
Usb-6210
147
Usb-6211/6215
149
USB-6212/6216 Screw Terminal
151
USB-6212/6216 Mass Termination
153
Usb-6212/6216 Bnc
158
USB-6218 Screw Terminal
164
Usb-6218 Bnc
166
Appendix B Troubleshooting

172

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National Instruments USB-621 Series User Manual (205 pages)

Table of Contents

Appendix B Troubleshooting

National Instruments USB-621 Series User Manual (204 pages)

Table of Contents

Appendix B Troubleshooting

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