National Instruments SCXI Bedienungsanleitung

CVI™, LabVIEW™, Measurement Studio™, National Instruments™, NI™, ni.com™, NI-DAQ™, and SCXI™ are trademarks of National Instruments

Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering

National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD,

or ni.com/patents.

SCXI Quick Start Guide

Signal Conditioning eXtensions for Instrumentation

This document assumes you have already installed, configured, and tested

a data acquisition (DAQ) device. If you have not done so, follow the

instructions in the DAQ Quick Start Guide for NI-DAQ 7.0 included with

the DAQ device before continuing. This document does not cover

PXI chassis, PXI combo chassis, the SCXI-1000DC chassis, the SCXI

switch modules, multichassis systems, or parallel-mode operation of any

module. Refer to the module, chassis, or cable adapter documentation for

information on these topics. If you are installing an SCXI switch, refer to

the NI Switches Getting Started Guide.

Contents

Conventions ............................................................................................ 2

Measurement System Overview ............................................................. 3

Step 1. Unpack the Module and Accessories.......................................... 4

Step 2. Verify the Components ............................................................... 5

Step 3. Set up the Chassis ....................................................................... 6

Step 4. Install Modules............................................................................ 7

Step 5. Attach Terminal Blocks .............................................................. 8

Step 6. Attach Sensors ............................................................................ 8

Step 7. Connect Modules to the DAQ Device ........................................ 9

Step 8. Power on the SCXI Chassis ........................................................ 9

Step 9. Launch Measurement & Automation Explorer (MAX).............. 9

Step 10. Add the SCXI Chassis .............................................................. 10

Step 11. Configure the Chassis ............................................................... 11

Traditional NI-DAQ ........................................................................ 11

NI-DAQmx ...................................................................................... 13

Step 12. Configure the SCXI Modules ................................................... 15

Traditional NI-DAQ ........................................................................ 15

NI-DAQmx ...................................................................................... 18

Step 13. Test the Chassis......................................................................... 21

Step 14. Configure Channels and Tasks ................................................. 21

Configure a Task in NI-DAQmx ..................................................... 22

Configure Global Channels for NI-DAQmx ................................... 24

Configure Virtual Channels for Traditional NI-DAQ ..................... 25

Getting Started Developing an Application ............................................ 25

Examples.......................................................................................... 25

™

SCXI Quick Start Guide 2 ni.com

Information about Measurement Applications and Devices ............26

LabVIEW ..................................................................................26

LabWindows/CVI .....................................................................27

Measurement Studio..................................................................27

ANSI C without NI Application Software ................................27

.NET Languages without NI Application Software ..................27

Device Documentation..............................................................27

Training Courses .......................................................................28

Technical Support .....................................................................28

Troubleshooting.......................................................................................28

Conventions

The following conventions are used in this guide.

»The »symbol leads you through nested menu items and dialog box options

to a final action. The sequence File»Page Setup»Options directs you to

pull down the File menu, select the Page Setup item, and select Options

from the last dialog box.

This icon denotes a note, which alerts you to important information.

This icon denotes a caution, which advises you of precautions to take to

avoid injury, data loss, or a system crash.

bold Bold text denotes items that you must select or click in the software, such

as menu items and dialog box options.

italic Italic text denotes variables, emphasis, a cross reference, or an introduction

to a key concept. This font also denotes text that is a placeholder for a word

or value that you must supply.

monospace Text in this font denotes text or characters that you should enter from the

keyboard, sections of code, programming examples, and syntax examples.

This font is also used for the proper names of disk drives, paths, directories,

programs, subprograms, subroutines, device names, functions, operations,

properties, methods, variables, filenames and extensions, and code

excerpts.

©National Instruments Corporation 3 SCXI Quick Start Guide

Measurement System Overview

Figure 1 depicts the measurement system overview, showing the path of

real-world physical phenomena to your measurement application. Signal

conditioning components use sensors and transducers to measure signals

analyzed and presented through application software.

Figure 1. Measurement System Overview

Your Measurement Application

Application Software

LabVIEW, LabWindows/CVI, Measurement Studio,

or other programming environments

Configuration

Measurement

& Automation

Explorer (MAX)

Application Programming Interface (API)

NI-DAQmx, Traditional NI-DAQ, NI-SWITCH,

or other API

Driver Engines

NI-DAQmx, Traditional NI-DAQ, VISA, etc.

Data Acquisition and Modular Instrumentation

SCXI

Sensors and Transducers

Real-World Signals and Physical Phenomena

–

PCI PXI

ONSTANDBY

PXI/SCXI Combination

MAINFRAME

SCXI

SCC

SC-2345

PCMCIA

Signal Conditioning

SCXI Quick Start Guide 4 ni.com

Step 1. Unpack the Module and Accessories

Your module is shipped in an antistatic package to prevent electrostatic

damage (ESD) to the module. ESD can damage several components on the

module.

Caution Never touch the exposed pins of connectors.

To avoid such damage when you handle the module, take the following

precautions:

• Ground yourself using a grounding strap or by holding a grounded

object.

• Touch the antistatic package to a metal part of the chassis before

removing the module from the package.

Remove the module from the package and inspect the module for loose

components or any sign of damage. Notify NI if the module appears

damaged in any way. Do not install a damaged module in the chassis.

Store the module in the antistatic package when the module is not in use.

Refer to the device documentation for safety and compliance information.

©National Instruments Corporation 5 SCXI Quick Start Guide

Step 2. Verify the Components

Make sure you have the basic components.

1 Terminal Block or TBX Accessories (optional)

2 SCXI Modules

3 SCXI-1000 or SCXI-1001 Chassis

4 Chassis Power Cord

5 Cable Assembly (Shielded Cable and

Cable Adapter)

6DAQDevice

7 Personal Computer

1 2 3 4

C17181920212223242526272829303132C

V12345678910111213141516V

SCXI1140

MAINFRAME

SCXI

5 6 7

SCXI Quick Start Guide 6 ni.com

Step 3. Set up the Chassis

Caution Follow proper ESD precautions to ensure you are grounded before installing the

hardware.

1. Power off and unplug the chassis.

2. Set the chassis address switches to off. In the following figure,

all switches are shown in the off position.

Note Older chassis use jumpers inside the front panel, instead of chassis address switches.

Older chassis also differ in fuses and AC power selection. Refer to the chassis

documentation for more information.

3. Confirm the correct power settings (100, 120, 220, or 240 VAC).

4. Connect the power cord.

1 Chassis Power Switch

2 Chassis Address Switches

3 Chassis Power Settings

4 Power Cord Connector

©National Instruments Corporation 7 SCXI Quick Start Guide

Step 4. Install Modules

Caution Make sure the chassis is powered off.

1. Insert all of the modules into the chassis.

2. Tighten the module thumbscrews.

1 Thumbscrews 2 Module

SCXI Quick Start Guide 8 ni.com

Step 5. Attach Terminal Blocks

Attach the terminal blocks to the front of the modules. Refer to

ni.com/products to determine valid terminal block and module

combinations. Refer to the TBX installation guide for the terminal block if

you are using a TBX adapter.

Step 6. Attach Sensors

Wire sensors to the terminal block or accessory terminals.

• For signal connection information, refer to the module or accessory

documentation.

• If any module in the SCXI system has switch or jumper settings, refer

to Getting Started with SCXI for more information about configuring

the hardware.

• For more information about sensors, refer to the following documents:

– If you are using sensors, refer to ni.com/sensors.

– If you are using LabVIEW, refer to the LabVIEW Measurements

Manual packaged with LabVIEW or available from

ni.com/manuals.

– If you are using other application software, refer to NI-DAQmx

Help for information on common measurements. Access the help

file from Start»Programs»National Instruments»

NI-DAQ»NI-DAQmx Help.

1 Modules with Installed Terminal Blocks

2 Attaching a Terminal Block to the

SCXI Module

3 SCXI Module Front Panels

ADDRESS

©National Instruments Corporation 9 SCXI Quick Start Guide

Step 7. Connect Modules to the DAQ Device

1. Attach the cable adapter, if necessary.

• If you have several modules in the system, determine which of the

modules occurs first in the following list. Attach the cable adapter

to the rear connector of this SCXI module.

– SCXI-1520, SCXI-1530, SCXI-1531, SCXI-1540,

SCXI-1581, SCXI-1140

– SCXI-1102, SCXI-1102/B/C, SCXI-1104/C, SCXI-1112,

SCXI-1125, SCXI-1126, SCXI-1141, SCXI-1142,

SCXI-1143

– SCXI-1100, SCXI-1120/D, SCXI-1121, SCXI-1122

– SCXI-1124, SCXI-116x

• If you have only one module, attach the cable adapter to the

module.

Use the screws provided to secure the adapter to the chassis.

Caution Do not force the adapter if there is resistance. Forcing the adapter can bend pins.

2. Connect one end of the cable to the adapter or module and the other

end to the DAQ device. Notice which SCXI module is connected to the

DAQ device; you will use this information in a later step.

Step 8. Power on the SCXI Chassis

The chassis power switch is shown in step 3.

Step 9. Launch Measurement & Automation Explorer (MAX)

Double-click the Measurement & Automation Explorer icon on the

desktop to launch MAX.

Note Refer to the Hardware Installation Wizard at ni.com/support/install for

SCXI configuration instructions with RT Series products. Select Hardware

Configuration and click Real-Time Configuration Wizard.

SCXI Quick Start Guide 10 ni.com

Step 10. Add the SCXI Chassis

1. Right-click Devices and Interfaces and select Create New.

2. Select the SCXI chassis from the Create New window.

If you are using more than one NI-DAQ API to control an SCXI

chassis in your application, add the chassis in each NI-DAQ API you

are using.

• If you are using Traditional NI-DAQ, select the chassis under

Traditional NI-DAQ Device.

• If you are using NI-DAQmx, select the chassis under NI-DAQmx

Device»NI-DAQmx SCXI Chassis.

When a device is supported by both Traditional NI-DAQ and

NI-DAQmx and both are installed, the same device is listed with a

different name under the Traditional NI-DAQ and NI-DAQmx folders

in Devices and Interfaces.

Note For more information about the Traditional NI-DAQ and NI-DAQmx Application

Programming Interfaces (APIs), refer to the DAQ Quick Start Guide for NI-DAQ 7.0.

3. Click Finish when you are done. A configuration window appears.

Refer to Step 11. Configure the Chassis for more information.

If your device does not automatically appear, press <F5> to refresh the

view in MAX. If the device is still not recognized, refer to

ni.com/support/install for troubleshooting information.

If you are using Traditional NI-DAQ, there is an alternative way to add an

SCXI chassis. Right-click Devices & Interfaces»Traditional NI-DAQ

Devices and select Add SCXI Chassis.

If you are using NI-DAQmx, there is an alternative way to add an SCXI

chassis. Right-click Devices & Interfaces»NI-DAQmx Devices and select

Create New NI-DAQmx Device. Select NI-DAQmx SCXI Chassis and

choose the chassis.

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