National Instruments 6221 Manuals

Manuals and User Guides for National Instruments 6221. We have 1 National Instruments 6221 manual available for free PDF download: User Manual

National Instruments 6221 User Manual (297 pages)

Multifunction I/O Modules and Devices

Brand: National Instruments | Category: I/O Systems | Size: 13 MB

Table of Contents
5
Getting Started
14
Safety Guidelines
14
Safety Guidelines for Hazardous Voltages
15
Electromagnetic Compatibility Guidelines
15
Hardware Symbol Definitions
16
Installation
16
Unpacking
16
Device Self-Calibration
17
Getting Started with M Series PCI Express Devices and the Disk Drive Power Connector
18
When to Use the Disk Drive Power Connector
18
Disk Drive Power Connector Installation
18
Getting Started with M Series USB Devices
19
Applying the Signal Label to USB Screw Terminal Devices
19
USB Device Chassis Ground
19
USB Device Panel/Wall Mounting
21
USB Device Leds
21
USB Cable Strain Relief
21
USB Device Fuse Replacement
22
USB Device Security Cable Slot
25
Installing a Ferrite
26
Pinouts
26
Specifications
26
Accessories and Cables
26
DAQ System Overview
27
DAQ Hardware
27
DAQ-STC2 and DAQ-6202
28
Calibration Circuitry
28
Cables and Accessories
29
68-Pin M Series Cables and Accessories
29
68-Pin Cables
31
68-Pin BNC Accessories
32
68-Pin Screw Terminal Accessories
32
RTSI Cables
32
SCC Carriers and Accessories
32
Scxi
33
68-Pin Custom Cabling and Connectivity
33
USB Device Accessories, USB Cable, and Power Supply
34
37-Pin M Series Cables and Accessories
34
37-Pin Cables
35
37-Pin Screw Terminal Accessories
35
RTSI Cables
35
37-Pin Custom Cabling
35
Signal Conditioning
36
Sensors and Transducers
36
Signal Conditioning Options
36
Scxi
36
Scc
37
Programming Devices in Software
37
Connector and LED Information
39
I/O Connector Signal Descriptions
39
+5 V Power Source
43
USER 1 and USER 2
43
RTSI Connector Pinout
45
LED Patterns
45
Analog Input
46
Analog Input Range
47
Analog Input Lowpass Filter
48
Analog Input Ground-Reference Settings
49
Configuring AI Ground-Reference Settings in Software
51
Multichannel Scanning Considerations
51
Analog Input Data Acquisition Methods
54
Software-Timed Acquisitions
54
Hardware-Timed Acquisitions
54
Analog Input Triggering
55
Connecting Analog Input Signals
56
Connecting Floating Signal Sources
57
What Are Floating Signal Sources
57
When to Use Differential Connections with Floating Signal Sources
57
When to Use Non-Referenced Single-Ended (NRSE) Connections with Floating Signal Sources
57
When to Use Referenced Single-Ended (RSE) Connections with Floating Signal Sources
58
Using Differential Connections for Floating Signal Sources
58
Using Non-Referenced Single-Ended (NRSE) Connections for Floating Signal Sources
61
Using Referenced Single-Ended (RSE) Connections for Floating Signal Sources
62
Connecting Ground-Referenced Signal Sources
62
What Are Ground-Referenced Signal Sources
62
When to Use Differential Connections with Ground-Referenced Signal Sources
63
When to Use Non-Referenced Single-Ended (NRSE) Connections with Ground-Referenced Signal Sources
63
When to Use Referenced Single-Ended (RSE) Connections with Ground-Referenced Signal Sources
64
Using Differential Connections for Ground-Referenced Signal Sources
64
Using Non-Referenced Single-Ended (NRSE) Connections for Ground-Referenced Signal Sources
65
Field Wiring Considerations
66
Analog Input Timing Signals
66
AI Sample Clock Signal
68
Using an Internal Source
69
Using an External Source
69
Routing AI Sample Clock Signal to an Output Terminal
69
Other Timing Requirements
69
AI Sample Clock Timebase Signal
70
AI Convert Clock Signal
70
Using an Internal Source
71
Using an External Source
71
Routing AI Convert Clock Signal to an Output Terminal
71
Using a Delay from Sample Clock to Convert Clock
72
Other Timing Requirements
72
AI Convert Clock Timebase Signal
74
AI Hold Complete Event Signal
74
AI Start Trigger Signal
74
Using a Digital Source
74
Using an Analog Source
75
Routing AI Start Trigger to an Output Terminal
75
AI Reference Trigger Signal
75
Using a Digital Source
76
Using an Analog Source
76
Routing AI Reference Trigger Signal to an Output Terminal
76
AI Pause Trigger Signal
76
Using a Digital Source
77
Using an Analog Source
77
Routing AI Pause Trigger Signal to an Output Terminal
77
Getting Started with AI Applications in Software
77
Analog Output
78
AO Offset and AO Reference Selection
79
Minimizing Glitches on the Output Signal
80
Analog Output Data Generation Methods
80
Software-Timed Generations
80
Hardware-Timed Generations
81
Analog Output Triggering
82
Connecting Analog Output Signals
82
Analog Output Timing Signals
83
AO Start Trigger Signal
83
Using a Digital Source
83
Using an Analog Source
84
Routing AO Start Trigger Signal to an Output Terminal
84
AO Pause Trigger Signal
84
Using a Digital Source
85
Using an Analog Source
85
Routing AO Pause Trigger Signal to an Output Terminal
85
AO Sample Clock Signal
85
Using an Internal Source
85
Using an External Source
85
Routing AO Sample Clock Signal to an Output Terminal
86
Other Timing Requirements
86
AO Sample Clock Timebase Signal
86
Getting Started with AO Applications in Software
87
Digital I/O
88
Static DIO
89
Digital Waveform Triggering
89
Digital Waveform Acquisition
90
DI Sample Clock Signal
90
Using an Internal Source
90
Using an External Source
91
Routing DI Sample Clock to an Output Terminal
91
Digital Waveform Generation
91
DO Sample Clock Signal
91
Using an Internal Source
92
Using an External Source
92
Routing DO Sample Clock to an Output Terminal
92
I/O Protection
92
Programmable Power-Up States
93
DI Change Detection
94
DI Change Detection Applications
95
Connecting Digital I/O Signals
95
Getting Started with DIO Applications in Software
96
Counter Input Applications
97
Counting Edges
98
Single Point (On-Demand) Edge Counting
98
Buffered (Sample Clock) Edge Counting
99
Controlling the Direction of Counting
99
Pulse-Width Measurement
99
Single Pulse-Width Measurement
100
Buffered Pulse-Width Measurement
100
Period Measurement
101
Single Period Measurement
101
Buffered Period Measurement
102
Semi-Period Measurement
103
Single Semi-Period Measurement
103
Buffered Semi-Period Measurement
103
Frequency Measurement
104
Low Frequency with One Counter
104
Low Frequency with One Counter (Averaged)
105
High Frequency with Two Counters
105
Large Range of Frequencies with Two Counters
106
Choosing a Method for Measuring Frequency
107
Position Measurement
110
Measurements Using Quadrature Encoders
111
Measurements Using Two Pulse Encoders
112
Buffered (Sample Clock) Position Measurement
113
Two-Signal Edge-Separation Measurement
113
Single Two-Signal Edge-Separation Measurement
114
Buffered Two-Signal Edge-Separation Measurement
114
Counter Output Applications
115
Simple Pulse Generation
115
Single Pulse Generation
115
Single Pulse Generation with Start Trigger
116
Retriggerable Single Pulse Generation
116
Pulse Train Generation
117
Continuous Pulse Train Generation
117
Finite Pulse Train Generation
118
Frequency Generation
118
Using the Frequency Generator
118
Frequency Division
119
Pulse Generation for ETS
119
Counter Timing Signals
120
Counter N Source Signal
120
Routing a Signal to Counter N Source
121
Routing Counter N Source to an Output Terminal
121
Counter N Gate Signal
121
Routing a Signal to Counter N Gate
122
Routing Counter N Gate to an Output Terminal
122
Counter N aux Signal
122
Routing a Signal to Counter N aux
122
Counter N A, Counter N B, and Counter N Z Signals
123
Routing Signals to A, B, and Z Counter Inputs
123
Routing Counter N Z Signal to an Output Terminal
123
Counter N Up_Down Signal
123
Counter N HW Arm Signal
123
Routing Signals to Counter N HW Arm Input
123
Counter N Internal Output and Counter N TC Signals
124
Routing Counter N Internal Output to an Output Terminal
124
Frequency Output Signal
124
Routing Frequency Output to a Terminal
124
Default Counter/Timer Pinouts
124
Counter Triggering
125
Other Counter Features
126
Cascading Counters
126
Counter Filters
126
Prescaling
128
Duplicate Count Prevention
128
Example Application that Works Correctly (no Duplicate Counting)
129
Example Application that Works Incorrectly (Duplicate Counting)
129
Example Application that Prevents Duplicate Count
130
When to Use Duplicate Count Prevention
130
Enabling Duplicate Count Prevention in NI-Daqmx
131
Synchronization Modes
131
80 Mhz Source Mode
132
Other Internal Source Mode
132
External Source Mode
132
Pfi
133
Using PFI Terminals as Timing Input Signals
134
Exporting Timing Output Signals Using PFI Terminals
134
Using PFI Terminals as Static Digital I/Os
135
Connecting PFI Input Signals
135
PFI Filters
136
I/O Protection
137
Programmable Power-Up States
137
Clock Routing
138
80 Mhz Timebase
139
100 Khz Timebase
139
External Reference Clock
139
10 Mhz Reference Clock
139
Synchronizing Multiple Devices
140
PXI/PXI Express Modules
140
PCI/PCI Express Devices
140
USB Devices
140
Real-Time System Integration (RTSI)
141
RTSI Connector Pinout
141
Using RTSI as Outputs
142
Using RTSI Terminals as Timing Input Signals
143
RTSI Filters
143
PXI Clock and Trigger Signals
145
Pxi_Clk10
145
PXI Triggers
145
PXI_STAR Trigger
145
PXI_STAR Filters
145
Bus Interface
147
Data Transfer Methods
147
PCI/PCI Express Device and PXI/PXI Express Module Data Transfer Methods
147
USB Device Data Transfer Methods
148
PXI Considerations
149
PXI Clock and Trigger Signals
149
PXI and PXI Express
149
Using PXI with Compactpci
150
Triggering
151
Triggering with a Digital Source
151
Triggering with an Analog Source
152
APFI <0,1> Terminals
152
Analog Input Channels
152
Analog Trigger Actions
153
Routing Analog Comparison Event to an Output Terminal
153
Analog Trigger Types
153
Analog Trigger Accuracy
156
Figure A-1. PCI/PXI-6220 Pinout
158
Figure A-2. PCI/PXI-6221 Pinout
161
Figure A-3. USB-6221 Screw Terminal Pinout
163
Figure A-4. USB-6221 BNC Top Panel and Pinout
165
Figure A-5. PCI-6221 (37-Pin) Pinout
167
Figure A-6. PCI/PXI-6224 Pinout
169
Figure A-7. PCI/PXI-6225 Pinout
171
Figure A-8. USB-6225 Screw Terminal Pinout
173
Figure A-9. USB-6225 Mass Termination Pinout
175
Figure A-10. PCI/PXI-6229 Pinout
177
Figure A-11. USB-6229 Screw Terminal Pinout
179
Figure A-12. USB-6229 BNC Top Panel and Pinout
181
Figure A-13. PCI/PXI-6250 Pinout
183
Figure A-14. ni Pci/Pcie/Pxi/Pxie-6251 Pinout
185
Figure A-15. USB-6251 Screw Terminal Pinout
187
Figure A-16. USB-6251 BNC Top Panel and Pinout
189
Figure A-17. USB-6251 Mass Termination Pinout
191
Figure A-18. PCI/PXI-6254 Pinout
193
Figure A-19. PCI/PXI-6255 Pinout
195
Figure A-20. USB-6255 Screw Terminal Pinout
197
Figure A-21. USB-6255 Mass Termination Pinout
199
Figure A-22. ni Pci/Pcie/Pxi/Pxie-6259 Pinout
201
Figure A-23. USB-6259 Screw Terminal Pinout
203
Figure A-24. USB-6259 BNC Top Panel and Pinout
205

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National Instruments 6221 User Manual (297 pages)

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