National Instruments SCXI-1324 Bedienungsanleitung

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National Instruments™, ni.com™, and SCXI™ are trademarks of National Instruments Corporation. Product and company names are trademarks or

trade names of their respective companies.

INSTALLATION GUIDE

SCXI -1324 HIGH-VOLTAGE TERMINAL BLOCK

This guide describes how to install and use the SCXI-1324 high-voltage

terminal block with the SCXI-1160 module. The SCXI-1324 high-voltage

terminal block has 48 screw terminals for easy signal connection to the

16 relays inside the SCXI-1160.

What You Need to Get Started

To set up and use your SCXI-1324 terminal block, you need the

following items:

❑SCXI-1324 high-voltage terminal block

❑SCXI-1324 High-Voltage Terminal Block Installation Guide

❑SCXI chassis

❑SCXI-1160 module

❑Number 1 and 2 Phillips-head screwdrivers

❑1/8 in. flathead screwdriver

❑Long-nose pliers

❑Wire cutter

❑Wire insulation stripper

™

SCXI-1324 Installation Guide 2 www.ni.com

Conventions

The following conventions are used in this guide:

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.

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

to a key concept.

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,

variables, filenames and extensions, and code excerpts.

Safety Information

Cautions Do not operate the device in an explosive atmosphere or where there may be

flammable gases or fumes.

Keep away from live circuits. Do not remove equipment covers or shields unless you are

trained to do so. If signal wires are connected to the device, hazardous voltages may exist

even when the equipment is turned off. To avoid a shock hazard, do not perform procedures

involving cover or shield removal unless you are qualified to do so and disconnect all field

power prior to removing covers or shields.

Equipment described in this document must be used in an Installation Category II1

environment per IEC 60664. This category requires local-level mains-connected

installation.

Do not operate damaged equipment. The safety protection features built into this device

can become impaired if the device becomes damaged in any way. If the device isdamaged,

turn the device off and do not use until service-trained personnel can check its safety.

If necessary, return the device to National Instruments for service and repair to ensure that

its safety is not compromised.

Do not operate this equipment in a manner that contradicts the information specified in this

document. Misuse of this equipment could result in a shock hazard.

Terminals are for use only with equipment that has no accessible live parts.

1 Category II refers to local-level power distribution, such as that provided by a standard wall outlet.

©National Instruments Corporation 3 SCXI-1324 Installation Guide

Do not substitute parts or modify equipment. Because of the danger of introducing

additional hazards, do not install unauthorized parts or modify the device. Return the

device to National Instruments for service and repair to ensure that its safety features are

not compromised.

When using the device with high common-mode voltages, you must insulate your signal

wires for the highest input voltage. National Instruments is not liable for any damages or

injuries resulting from inadequate signal wire insulation. Use only 26-14 AWG wire with

a rating of 300 V and 60 °C for signals that may come in contact with 250 V.

When connecting or disconnecting signal lines to or from the SCXI terminal block screw

terminals, make sure the lines are powered off. Potential differences between the lines and

the SCXI ground create a shock hazard while you connect the lines.

Connections, including power signals to ground and vice versa, that exceed any of the

maximum signal ratings on the SCXI device can create a shock or fire hazard or can

damage any or all devices connected to the SCXI chassis, the host computer, and the SCXI

device. National Instruments is not liable for any damages or injuries resulting from

incorrect signal connections.

If high voltages (≥30 Vrms and 42.4 Vpeak or ±60 VDC) are present, you must connect a

safety earth ground wire to the terminal block safety ground solder lug, shown in Figure 1.

This complies with safety agency requirements and protects against electric shock when

the terminal block is not connected to the chassis. To connect the safety earth ground to the

safety ground solder lug, run an earth ground wire in the cable from the signal source to

the terminal block. National Instruments is not liable for any damages or injuries resulting

from inadequate safety earth ground connections.

Do not loosen or re-orient the safety ground solder lug hardware when connecting the

safety ground wire; to do so reduces the safety isolation between the high voltage and

safety ground.

Connecting Signal Wires to the Terminal Block

Note Refer to the Safety Information section before removing equipment covers or

connecting or disconnecting any signal wires.

When connecting your signals to the SCXI-1324, follow the labeling on the

SCXI-1324 as indicated in Figure 2.

To connect the signal to the terminal block, perform the following steps,

referring to Figures 1 and 2 as necessary:

1. Unscrew the top cover screws and remove the cover.

2. Loosen the strain-relief screws and remove the strain-relief bar.

3. Run the signal wires through the strain-relief opening. You can add

insulation or padding if necessary.

SCXI-1324 Installation Guide 4 www.ni.com

4. Prepare your signal wire by stripping the insulation no more than

7mm.

5. Connect the wires to the screw terminals by inserting the stripped end

of the wire fully into the terminal. No bare wire should extend past the

screw terminal. Exposed wire increases the risk of short circuiting

adjacent signals causing a circuit failure.

6. Tighten the screws to a torque of 5–7 in.-lb.

7. Connect safety earth ground to the safety-ground solder lug. Refer to

the Safety Information section for connection information.

8. Reinstall the strain-relief bar and tighten the strain-relief screws.

9. Reinstall the top cover and tighten the top cover screws.

10. Connect the terminal block to the module front connectoras explained

in the Connecting the Terminal Block to the SCXI Module section.

Figure 1. SCXI-1324 Parts Locator Diagram

1 Strain-Relief Bar

2 Strain-Relief Screws 3 Safety-Ground

Solder Lug 4 Mating Connector

5 Thumbscrew 6 Top Cover Screws

7 Top Cover

Back View Front View

©National Instruments Corporation 5 SCXI-1324 Installation Guide

Figure 2. SCXI-1324 Signal Connections

Connecting the Terminal Block to the SCXI Module

To connect the terminal block to the SCXI module front connector, refer to

Figure 3 while performing the following steps:

1. Connect the module front connector to its mating connector on the

terminal block.

2. Tighten the top and bottom thumbscrews on the back of the terminal

block to hold it securely in place.

Figure 3. SCXI-1324 Terminal Block Installation

1 Assembly Number 2 Product Name 3 Serial Number

1 SCXI Module 2 SCXI-1324 Terminal Block 3 Thumbscrew

1 2 3

SCXI 1100

SCXI-1324 Installation Guide 6 www.ni.com

Cleaning the Terminal Block

Clean the terminal block by brushing off light dust with a soft, nonmetallic

brush. Remove other contaminants with deionized water and a stiff

nonmetallic brush. The unit must be completely dry and free from

contaminants before returning to service.

Specifications

Electrical Common-mode isolation

Channel to channel..........................250 Vrms

Channel to ground ...........................250 Vrms

Load or signal current.............................2A maximum per channel

Environment Operating temperature............................0 to 50 °C

Storage temperature................................–20 to 70 °C

Relative humidity ...................................5 to 90% noncondensing

Safety Designed in accordance with IEC 61010-1, UL 3111-1, and CAN/CSA

C22.2 No. 1010.1 for electrical measuring and test equipment

Approved at altitudes up to 2000 m

Installation Category II

Pollution Degree 2

©National Instruments Corporation 7 SCXI-1324 Installation Guide

Technical Support Resources

NI Web Support To provide you with immediate answers and solutions 24 hours a day,

365 days a year, National Instruments maintains extensive online technical

support resources. They are available to you at no cost, are updated daily,

and can be found in the Technical Support section of our Web site at

www.ni.com/support

Worldwide SupportNational Instruments has offices located around the globe. Many branch

offices maintain a Web site to provide information on local services. You

can access these Web sites from www.ni.com/worldwide

For telephone support in the United States, dial 512 795 8248. For

telephone support outside the United States, contact your local branch

office:

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Brazil 011 284 5011, Canada (Calgary) 403 274 9391,

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