National Instruments NI 9203 Manual de usuario

NI-9203

USER GUIDE AND SPECIFICATIONS

NI cDAQ-9172

Contents

Introduction............................................................................................. 4

Safety Guidelines .................................................................................... 5

Safety Guidelines for Hazardous Voltages...................................... 5

Related Documentation........................................................................... 6

Device Documentation and Specifications ...................................... 9

Training Courses.............................................................................. 9

Technical Support on the Web......................................................... 9

Installing the Software ............................................................................ 10

Installing NI-DAQmx ...................................................................... 10

Installing Other Software................................................................. 10

Installing the NI cDAQ-9172.................................................................. 11

Mounting the NI cDAQ-9172.......................................................... 12

NI 9901 Desktop Mounting Kit................................................ 12

NI 9910 DIN-Rail Kit............................................................... 13

NI 9905 Panel Mount Kit ......................................................... 13

Setting Up the NI cDAQ-9172................................................................ 15

Understanding LED Indications.............................................................. 17

Active LED ...................................................................................... 17

Ready LED ...................................................................................... 17

Using the NI cDAQ-9172 ....................................................................... 18

C Series I/O Modules....................................................................... 18

Correlated vs. Static DIO Modules........................................... 19

cDAQ Module Interface .................................................................. 19

USB-STC2 ....................................................................................... 19

AI and AO Sample Timing....................................................... 19

Triggering Modes ..................................................................... 19

Independent Data Streams ........................................................ 19

PFI Signals................................................................................ 20

Flexible Counter/Timers........................................................... 20

ni.com/manuals

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NI cDAQ-9172 User Guide and Specifications 2 ni.com

Analog Input ............................................................................................20

Analog Input Triggering...................................................................20

AI Start Trigger Signal..............................................................21

AI Reference Trigger Signal .....................................................22

AI Pause Trigger Signal ............................................................24

Analog Input Timing Signals ...........................................................24

AI Sample Clock .......................................................................24

AI Sample Clock Timebase.......................................................25

Convert Behavior For Analog Input Modules...........................25

Getting Started with AI Applications in Software ...........................28

Analog Output .........................................................................................28

Analog Output Data Generation Methods........................................28

Software-Timed Generations ....................................................29

Hardware-Timed Generations ...................................................29

Analog Output Triggering ................................................................30

Analog Output Timing Signals.........................................................31

AO Sample Clock......................................................................31

AO Start Trigger Signal ............................................................31

AO Pause Trigger Signal...........................................................33

Minimizing Glitches on the Output Signal.......................................34

Getting Started with AO Applications in Software..........................34

Digital I/O................................................................................................35

Correlated vs. Static DIO Modules ..................................................35

Static DIO.........................................................................................36

Digital Waveform Acquisition (Correlated Input) ...........................36

DI Sample Clock Signal............................................................36

Digital Waveform Generation (Correlated Output) .........................37

Buffered Digital Waveform Generation....................................38

Change Detection Event ...................................................................39

Routing Change Detection Event to an Output Terminal .........39

Change Detection Acquisition..........................................................39

Digital Input/Output Configuration for NI 9401 ..............................39

PFI ...........................................................................................................40

Counters...................................................................................................40

Counter Input Applications ..............................................................42

Counting Edges .........................................................................42

Pulse-Width Measurement ........................................................44

Period Measurement..................................................................46

Semi-Period Measurement ........................................................48

Frequency Measurement ...........................................................49

Position Measurement ...............................................................54

Two-Signal Edge-Separation Measurement..............................57

Counter Output Applications............................................................59

Simple Pulse Generation ...........................................................59

Pulse Train Generation..............................................................61

Frequency Generation ...............................................................62

Frequency Division ...................................................................63

©National Instruments Corporation 3 NI cDAQ-9172 User Guide and Specifications

Counter Timing Signals ................................................................... 63

Counter nSource Signal ........................................................... 64

Counter nGate Signal............................................................... 65

Counter nAux Signal ............................................................... 65

Counter nA, Counter nB, and Counter nZ Signals ................ 66

Counter nUp_Down Signal ..................................................... 66

Counter nHW Arm Signal ....................................................... 66

Counter nInternal Output and Counter nTC Signals .............. 67

Frequency Output Signal .......................................................... 67

Default Counter/Timer Routing....................................................... 68

Counter Triggering .......................................................................... 68

Other Counter Features .................................................................... 69

Cascading Counters .................................................................. 69

Counter Filters .......................................................................... 69

Prescaling.................................................................................. 70

Duplicate Count Prevention...................................................... 71

Synchronization Modes ............................................................ 73

Digital Routing and Clock Generation.................................................... 75

Clock Routing .................................................................................. 76

80 MHz Timebase .................................................................... 76

20 MHz Timebase .................................................................... 76

100 kHz Timebase .................................................................... 76

Specifications .......................................................................................... 77

Analog Input .................................................................................... 77

Analog Output.................................................................................. 77

Digital Waveform Characteristics (Slots 1 through 4 Only) ........... 78

PFI Characteristics (Slots 5 and 6 Only) ......................................... 78

General-Purpose Counter/Timers (Slots 5 and 6 Only)................... 79

Frequency Generator (Slots 5 and 6 Only) ...................................... 80

External Digital Triggers (Slots 5 and 6 or with Some

AI Modules) .................................................................................. 80

Module I/O States ............................................................................ 80

Power Requirements ........................................................................ 80

Bus Interface .................................................................................... 81

Physical Characteristics ................................................................... 81

Safety ............................................................................................... 81

Environmental.................................................................................. 82

Shock and Vibration ........................................................................ 82

Electromagnetic Compatibility ........................................................ 83

CE Compliance ................................................................................ 83

Environmental Management............................................................ 83

Where to Go for Support......................................................................... 84

NI cDAQ-9172 User Guide and Specifications 4 ni.com

Introduction

This user guide describes how to use the National Instruments cDAQ-9172

chassis and lists specifications. For an interactive demonstration of how to

install the NI cDAQ-9172, go to ni.com/info and enter daqinstall.

The NI cDAQ-9172 is an eight-slot USB chassis designed for use

with C Series I/O modules. The NI cDAQ-9172 chassis is capable of

measuring a broad range of analog and digital I/O signals and sensors using

a Hi-Speed USB 2.0 interface. For module specifications, refer to the

documentation included with your C Series I/O module(s) or go to

ni.com/manuals.

Figure 1. NI cDAQ-9172 Chassis

1 Power Switch

2 Ready/Active LEDs

3 Power Connector

4 USB Connector

5 Empty Module Slots

6 Installed C Series I/O Modules

7 Screw for Ground Connection

NI cDAQ-9172

Ready

Active

11-30 VDC

15 W

OFF

12345

4 5 6

©National Instruments Corporation 5 NI cDAQ-9172 User Guide and Specifications

Safety Guidelines

Operate the NI cDAQ-9172 chassis only as described in this user guide.

Note Because some C Series I/O modules may have more stringent certification standards

than the NI cDAQ-9172 chassis, the combined system may be limited by individual

component restrictions. Refer to the Using the NI cDAQ-9172 section of this document for

more details.

Caution The NI cDAQ-9172 chassis is not certified for use in hazardous locations.

Hot Surface This icon denotes that the component may be hot. Touching this component

may result in bodily injury.

Safety Guidelines for Hazardous Voltages

If hazardous voltages are connected to the module, take the following

precautions. A hazardous voltage is a voltage greater than 42.4 Vpk or

60 VDC to earth ground.

Caution Ensure that hazardous voltage wiring is performed only by qualified personnel

adhering to local electrical standards.

Caution Do not mix hazardous voltage circuits and human-accessible circuits on the same

module.

Caution Make sure that chassis and circuits connected to the module are properly

insulated from human contact.

Caution The NI cDAQ-9172 chassis provides no isolation, but some modules offer

isolation. Follow the safety guidelines for each module when using hazardous voltage.

NI cDAQ-9172 User Guide and Specifications 6 ni.com

Related Documentation

Each application software package and driver includes information about

writing applications for taking measurements and controlling measurement

devices. Check ni.com/manualsfor the most recent hardware

documentation, and refer to Table 1 for a list of locations for driver and

application software documentation. The following document location

references assume you have NI-DAQmx 8.8 or later, and where applicable,

version 7.1 or later of the NI application software.

Table 1. NI Driver and Application Software Documentation

Software Document/Description Location/Topic

NI-DAQmx for Windows DAQ Getting Started

Guide—describes how to

install and use the

NI-DAQmx driver software

for Windows and your data

acquisition (DAQ) device,

how to confirm the device is

operating properly, and how

to take an NI-DAQmx

measurement.

Start»Programs»

National Instruments»

NI-DAQ»DAQ Getting Started

Guide

NI-DAQ Readme—includes

information about

NI-DAQmx and Traditional

NI-DAQ (Legacy).

Describes how to choose

the API to use, new

features, and a list of known

issues, supported devices,

and devices not supported.

Also provides details about

system requirements.

Start»Programs»

National Instruments»

NI-DAQ»NI-DAQ Readme

NI-DAQmx Help—explains

how to get started in your

OS and ADE; provides an

NI-DAQmx overview;

includes information about

programming the most

common measurement

tasks with references to

examples in CVI/C, C++,

.NET.

Start»Programs»

National Instruments»

NI-DAQ»NI-DAQmx Help

©National Instruments Corporation 7 NI cDAQ-9172 User Guide and Specifications

LabVIEW Getting Started with

LabVIEW—describes the

LabVIEW graphical

programming environment

and the basic LabVIEW

features you use to build

data acquisition and

instrument control

application.

Start»All Programs»

National Instruments»

LabVIEW»LabVIEW Manuals or

navigate to the labview\manuals

directory and opening

LV_Getting_Started.pdf

LabVIEW Help—provides

information about

LabVIEW programming

concepts, step-by-step

instructions for using

LabVIEW, and reference

information about

LabVIEW VIs, functions,

palettes, menus, and tools.

Help»Search the LabVIEW Help

LabVIEW Help Topics Specific to NI-DAQmx

Includes overview

information and a tutorial to

learn how to take an

NI-DAQmx measurement

in LabVIEW using the

DAQ Assistant.

From the Contents tab, Getting

Started»Getting Started with DAQ

Describes the LabVIEW

NI-DAQmx VIs and

properties.

From the Contents tab, VI and

Function Reference»

Measurement I/O VIs and

Functions

Contains the conceptual

and how-to information you

need to acquire and analyze

measurement data in

LabVIEW, including

common measurements,

measurement

fundamentals, NI-DAQmx

key concepts, and device

considerations.

From the Contents tab, Taking

Measurements

Table 1. NI Driver and Application Software Documentation (Continued)

Software Document/Description Location/Topic

NI cDAQ-9172 User Guide and Specifications 8 ni.com

LabWindows™/CVI™LabWindows/CVI Help

Data Acquisition

book—contains

NI-DAQmx measurement

concepts and step-by-step

instructions about creating

a measurement task using

the DAQ Assistant.

Help»Contents, then select Using

LabWindows/CVI»

Data Acquisition»Taking an

NI-DAQmx Measurement in

LabWindows/CVI

LabWindows/CVI Help

NI-DAQmx Library

book—contains

NI-DAQmx API overviews

and function reference.

LibraryReference»

NI-DAQmx Library

Measurement

Studio/Microsoft Visual

Studio .NET

Microsoft Visual Studio

.NET Help/NI

Measurement Studio

Help—contains

NI-DAQmx methods and

properties.

Measurement Studio»

NI Measurement Studio Help and

select NI-DAQmx .NET Class

Library or NI-DAQmx Visual C++

Class Library

ANSI C without

NI Application Software

NI-DAQmx Help Start»All Programs»

National Instruments»

NI-DAQ»NI-DAQmx Help

NI-DAQmx C Reference

Help—describes the

NI-DAQmx Library

functions.

Start»All Programs»

National Instruments»

NI-DAQ»NI-DAQmx C Reference

Help

Table 1. NI Driver and Application Software Documentation (Continued)

Software Document/Description Location/Topic

©National Instruments Corporation 9 NI cDAQ-9172 User Guide and Specifications

Device Documentation and Specifications

Check ni.com/manualsfor the most recent device and software

documentation. If you do not have Web access, NI-DAQmx includes a

Documentation CD that includes documentation available when

NI-DAQmx released.

Training Courses

If you need more help getting started developing an application with

NI products, NI offers training courses. To enroll in a course or obtain

a detailed course outline, refer to ni.com/training.

Technical Support on the Web

For additional support, refer to ni.com/support or zone.ni.com.

.NET Languages without

NI Application Software*

NI-DAQmx .NET

Help—contains conceptual

topics for using NI-DAQmx

with Visual C# and Visual

Basic .NET.

Start»All Programs»

National Instruments»

NI-DAQ»NI-DAQmx .NET

Reference Help. Expand

NI Measurement Studio Help»

NI Measurement Studio .NET

Class Library»Reference to view

the function reference. Expand

NI Measurement Studio Help»

NI Measurement Studio .NET

Class Library»Using the

Measurement Studio .NET Class

Libraries

Visual Studio .NET

Help—contains conceptual

topics for using NI-DAQmx

with Visual C# and Visual

Basic .NET.

Help»Contents. Select

Measurement Studio from the

Filtered By drop-down list and

follow the location instructions for

the NI-DAQmx .NET Help.

* With the Microsoft .NET Framework version 1.1 or later, you can use NI-DAQmx to create applications using Visual C#

and Visual Basic .NET without Measurement Studio. You need Microsoft Visual Studio .NET 2003 or Microsoft Visual

Studio 2005 for the API documentation to be installed.

Table 1. NI Driver and Application Software Documentation (Continued)

Software Document/Description Location/Topic

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