National Instruments SCXI-1000 Manuale utente

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SCXI Quick Start Guide

Signal Conditioning eXtensions for Instrumentation

This document explains how to install and configure SCXI signal

conditioning modules in SCXI-1000, SCXI-1001, SCXI-1000DC, or

PXI/SCXI combination chassis, confirm the module and chassis are

operating properly, and set up multichassis systems. It also describes the

NI-DAQ 7.xsoftware relative to SCXI and integrated signal conditioning

products. This document assumes you have already installed, configured,

and tested the data acquisition (DAQ) device to which you will connect the

SCXI module. If you have not, refer to the DAQ Quick Start Guide included

with the DAQ device, and available on the NI-DAQ 7.xDevice

Documentation CD and from ni.com/manuals, before continuing.

This document does not cover installing and configuring SCXI switch

modules. If you are installing an SCXI switch, refer to the NI Switches

Getting Started Guide.

Contents

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

Step 1. Unpack the Chassis, Module, and Accessories........................... 3

Step 2. Verify the Components ............................................................... 4

Step 3. Set Up the Chassis ...................................................................... 5

SCXI Chassis ................................................................................... 5

PXI/SCXI Combination Chassis...................................................... 5

Step 4. Install the Modules...................................................................... 6

PXI/SCXI Combination Chassis...................................................... 6

SCXI Chassis ................................................................................... 7

SCXI USB Modules......................................................................... 8

Adding a Module to an Existing SCXI System ............................... 8

Step 5. Attach Sensors and Signal Lines................................................. 9

Step 6. Attach the Terminal Blocks ........................................................ 10

SCXI Chassis or PXI/SCXI Combination Chassis .......................... 10

Step 7. Install the Cable Adapter ............................................................ 11

Single-Chassis System..................................................................... 11

Multichassis System ........................................................................ 12

Step 8. Connect the Modules to the DAQ Device .................................. 13

Single-Chassis System..................................................................... 13

Multichassis System ........................................................................ 14

Step 9. Power On the SCXI Chassis ....................................................... 15

™

SCXI Quick Start Guide 2 ni.com

Step 10. Launch Measurement & Automation Explorer (MAX) ............15

Step 11. Confirm That the Chassis and Modules Are Recognized .........15

Step 12. Add the Chassis .........................................................................16

Identify the PXI Controller...............................................................16

Add the SCXI Chassis in NI-DAQmx..............................................17

Add the SCXI Chassis in Traditional NI-DAQ (Legacy) ................17

Step 13. Configure the Chassis and Modules ..........................................18

Configure the Chassis and Modules in NI-DAQmx.........................18

Add Modules to an Existing System in NI-DAQmx........................22

Configure the Chassis and Modules in Traditional

NI-DAQ (Legacy)..........................................................................22

Add Modules to an Existing Local System in Traditional

NI-DAQ (Legacy)..........................................................................25

Step 14. Test the Chassis .........................................................................26

Step 15. Configure Channels and Tasks..................................................27

Getting Started Developing an Application.............................................27

Troubleshooting.......................................................................................27

Tips...................................................................................................27

Resources..........................................................................................28

Frequently Asked Questions.............................................................28

Worldwide Technical Support.................................................................31

Specifications...........................................................................................32

Safety................................................................................................32

Electromagnetic Compatibility.........................................................32

CE Compliance.................................................................................32

Conventions

The following conventions are used in this guide.

<> Angle brackets indicate function keys.

»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.

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. When this symbol is marked

on a product, refer to the Read Me First: Safety and Radio-Frequency

Interference document, shipped with the device, for precautions to take.

When this symbol is marked on a product, it denotes a warning advising

you to take precautions to avoid electrical shock.

©National Instruments Corporation 3 SCXI Quick Start Guide

When this symbol is marked on a product, it denotes a component that may

be hot. Touching this component may result in bodily injury.

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 a cross reference, an introduction to a key concept,

hardware labels, or 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, proper names of disk drives, paths, directories, programs,

functions, filenames, and extensions.

monospace bold Bold text in this font denotes the messages and responses that the computer

automatically prints to the screen. This font also emphasizes lines of code

that are different from the other examples.

Step 1. Unpack the Chassis, Module, and Accessories

Your module is shipped in an antistatic package to prevent electrostatic

damage (ESD) to the module and its components.

Caution Never touch the exposed pins of connectors.

To avoid such damage, take the following precautions:

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

object.

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

removing the module from the package.

Remove the chassis, module, and accessory from the packaging and inspect

the products for loose components or any sign of damage. Notify NI if any

of the products appear damaged in any way. Do not install a damaged

device.

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

For safety and compliance information, refer to the device documentation

packaged with your device or on the NI-DAQ 7.xDevice Documentation

CD in the NI-DAQ software kit or at ni.com/support. After you install

the Device Document Browser, device documents are accessible from

Start»Programs»National Instruments»NI-DAQ»Browse Device

Documentation.

SCXI Quick Start Guide 4 ni.com

Step 2. Verify the Components

Make sure you have the SCXI system components shown in Figure 1.

Figure 1. SCXI System Components

In addition, you need the following items:

•NI-DAQ7.xsoftware and documentation

• At least one of the following software packages and documentation:

–LabVIEW

– LabWindows™/CVI™

– Visual C++

– Visual Basic

• SCXI product manuals

• 1/8 in. flathead screwdriver

• Numbers 1 and 2 Phillips screwdrivers

• Wire insulation strippers

• Long nose pliers

1 Terminal Block or TBX Accessories (optional)

2 PXI Module

3 SCXI Modules

4 PXI/SCXI Combination Chassis with Controller

5 SCXI Chassis

6 Chassis Power Cord

7 For SCXI Chassis Only

8 Chassis Adapter Assembly

9DAQDevice

10 USB Cable

11 SCXI USB Device

12 Personal Computer

Or Or

1 3 5 6

C17181920212223242526272829303132C

V12 345 678910111213141516V

SCXI1140

MAINFRAME

SCXI

POWER

RESET

ADDRESS

OrOr

2 4

©National Instruments Corporation 5 SCXI Quick Start Guide

Step 3. Set Up the Chassis

Caution Refer to the Read Me First: Safety and Radio-Frequency Interference document

packaged with your chassis before removing equipment covers or connecting or

disconnecting any signal wires. Follow proper ESD precautions to ensure you are grounded

before installing the hardware.

SCXI Chassis

1. Power off and unplug the chassis.

2. Set the chassis address if your chassis is addressable. Some older

chassis are not addressable.

• If the chassis has address switches, set the positions to off.

In Figure 2, all switches are shown in the off position.

• Some 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.

Figure 2. SCXI Chassis Setup

PXI/SCXI Combination Chassis

Note A system controller must be installed in the PXI side of the chassis. Refer to

ni.com/info and type rdfis5 for more information on ordering a configured PXI/SCXI

combination chassis through Factory Installation Services.

1 Front

2Back

3 Chassis Power Switch

4 Chassis Address Switch

5 Voltage Selection Tumbler

6 Power Cord Connector

RESET

ADDRESS

SCXI

120Vac

POWER

RESET

ADDRESS

1 2

SCXI Quick Start Guide 6 ni.com

1. Power off both the PXI and SCXI power switches, and unplug the

chassis.

2. Set the SCXI address switches positions to off. In Figure 3, all

switches are shown in the off position.

3. Set the voltage selection tumbler to the correct voltage for your

application. Refer to the chassis documentation for more information.

4. Connect the power cord.

Figure 3. PXI/SCXI Combination Chassis Setup

Step 4. Install the Modules

Caution Make sure the chassis is completely powered off. SCXI modules are not

hot-swappable. Adding or removing modules while the chassis is powered on can result in

blown chassis fuses or damage to the chassis and modules.

PXI/SCXI Combination Chassis

To install the PXI E Series or M Series DAQ communicating device in the

right-most slot of the PXI chassis, complete the following steps:

1. Touch any metal part of the chassis to discharge static electricity.

2. Place the module edges into the top and bottom PXI module guides,

as shown in Figure 4.

1 Front

2Back

3 Voltage Selection Tumbler

4 Power Cord Connector

5 Address Switch

6 SCXI Power Switch

7 PXI Power Switch

8 System Controller

SCXI

120Vac

RESET

ADDRESS

©National Instruments Corporation 7 SCXI Quick Start Guide

3. Slide the module to the rear of the chassis. Make sure that the

injector/ejector handle is pushed down.

4. When you begin to feel resistance, pull up on the injector/ejector

handle to inject the module into the frame.

5. Secure the module to the chassis front panel mounting rail using the

two screws.

Figure 4. Installing the PXI Module in a New Chassis

SCXI Chassis

1. Touch any metal part of the chassis to discharge static electricity.

2. Insert the module into the SCXI slot.

3. Secure the module to the chassis front panel mounting rail using the

two thumbscrews.

Figure 5. Installing the SCXI Module in a New Chassis

1 PXI DAQ Module

2 Injector/Ejector Handle

3 Injector/Ejector Rail

1 Thumbscrews 2 Module

SCXI Quick Start Guide 8 ni.com

SCXI USB Modules

Note SCXI USB modules, such as the SCXI-1600, cannot be used in a PXI/SCXI

combination chassis or in multichassis systems.

SCXI USB modules are plug-and-play, integrated signal conditioning

modules that communicate between an SCXI system and a

USB-compatible computer or USB hub, so no intermediate DAQ device is

needed. After you install the module in the chassis, complete the following

steps:

1. Connect the USB cable from the computer port or from any other USB

hub to the USB port on the SCXI USB module.

2. Attach the cable to the strain relief using a cable tie.

Figure 6. Installing an SCXI USB Module

Adding a Module to an Existing SCXI System

You also can add a module to an existing SCXI system in multiplexed

mode. If your system already has a controller established, you can simply

install additional SCXI modules in any available chassis slots as previously

described. Refer to the list of SCXI modules in Step 7. Install the Cable

Adapter to determine which module to connect to the cable adapter,

if applicable.

1 Personal Computer

2USBHub

3 USB Cable

4 SCXI USB Device

ADDRESS

©National Instruments Corporation 9 SCXI Quick Start Guide

Figure 7. Installing the SCXI Module in an Existing System

Step 5. Attach Sensors and Signal Lines

Wire sensors and signal lines to the terminal block, accessory, or module

terminals. Helpful information is available as follows:

• Signal and terminal connections:

– You can view and print a connection diagram for NI-DAQmx

tasks and virtual channels in your system through the DAQ

Assistant. Select the task or virtual channel and click the

Connection Diagram tab. Select each virtual channel in the task

to view the terminal names and numbers for connections from

sensor to connector block.

– Module and accessory documentation is on the Device Document

Browser.

– Pin assignments also are located in the Device Terminals topics

of the Measurement and Automation Explorer Help for

NI-DAQmx and Measurement and Automation Explorer for

Traditional NI-DAQ, both accessible from the MAX Help menu.

• Switch or jumper settings—Refer to the module user manual for more

information about configuring the hardware.

•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.

1 New SCXI Module

2 Existing SCXI Module

3 SCXI Chassis

4 Existing DAQ Device

ADDRESS BAUD

SCXI Quick Start Guide 10 ni.com

– If you are using NI-DAQmx, refer to the Sensors topic of the

NI-DAQmx Help, which you can access from Start»Programs»

National Instruments»NI-DAQ»NI-DAQmx Help.

– If you are using Traditional NI-DAQ (Legacy), refer to Chapter 5,

Transducer Conversion Functions, of the Traditional NI-DAQ

User Manual, which you can access from Start»Programs»

National Instruments»NI-DAQ»Traditional NI-DAQ User

Manual.

– For information on IEEE 1451.4 TEDS smart sensors, refer to

ni.com/zone.

Step 6. Attach the Terminal Blocks

SCXI Chassis or PXI/SCXI Combination Chassis

Note If you installed direct-connect modules, skip to Step 7. Install the Cable Adapter.

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 if you are using a

TBX terminal block.

Figure 8. Attaching Terminal Blocks

1 Modules with Installed Terminal Blocks

2 Attaching a Terminal Block to the SCXI Module

3 SCXI Module Front Panels

ADDRESS

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