National Instruments NI 9474 Manuel utilisateur

GETTING STARTED GUIDE

NI 9474

8 DO, 5 V to 30 V, Sourcing, 1 μs

This document explains how to connect to the NI 9474. In this

document, the NI 9474 with screw terminal and the NI 9474 with

spring terminal are referred to inclusively as the NI 9474.

Note Before you begin, complete the software and

hardware installation procedures in your chassis

documentation.

Note The guidelines in this document are specific to

the NI 9474. The other components in the system might

not meet the same safety ratings. Refer to the

documentation for each component in the system to

determine the safety and EMC ratings for the entire

system.

Safety Guidelines

Operate the NI 9474 only as described in this document.

Caution Do not operate the NI 9474 in a manner not

specified in this document. Product misuse can result in

a hazard. You can compromise the safety protection

built into the product if the product is damaged in any

2| ni.com | NI 9474 Getting Started Guide

way. If the product is damaged, return it to NI for

repair.

Hazardous Voltage This icon denotes a warning

advising you to take precautions to avoid electrical

shock with the NI 9474 with screw terminal and the

NI 9474 with spring terminal.

Safety Voltages

Connect only voltages that are within the following limits.

Channel-to-COM 30 VDC maximum

Isolation

Channel-to-channel None

Channel-to-earth ground

Continuous 250 Vrms, Measurement

Category II

Withstand 2,300 Vrms, verified by a 5 s

dielectric withstand test

Measurement Category II is for measurements performed on

circuits directly connected to the electrical distribution system.

NI 9474 Getting Started Guide | © National Instruments | 3

This category refers to local-level electrical distribution, such as

that provided by a standard wall outlet, for example, 115 V for

U.S. or 230 V for Europe.

Caution Do not connect the NI 9474 to signals or use

for measurements within Measurement Categories III

or IV.

Safety Guidelines for Hazardous Voltages

If hazardous voltages are connected to the device, take the

following precautions. A hazardous voltage is a voltage greater

than 42.4 Vpk voltage 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 Ensure that devices and circuits connected to

the module are properly insulated from human contact.

Note When module terminals are hazardous voltage

LIVE (>42.4 Vpk/60 VDC), you must ensure that

4| ni.com | NI 9474 Getting Started Guide

devices and circuits connected to the module are

properly insulated from human contact. You must use

the NI 9927 connector backshell kit with the NI 9474

with screw terminal and the NI 9981 connector

backshell kit with the NI 9474 with spring terminal to

ensure that the terminals are not accessible.

Safety Guidelines for Hazardous Locations

The NI 9474 is suitable for use in Class I, Division 2, Groups A,

B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4

and Ex nA IIC T4 hazardous locations; and nonhazardous

locations only. Follow these guidelines if you are installing the

NI 9474 in a potentially explosive environment. Not following

these guidelines may result in serious injury or death.

Caution Do not disconnect I/O-side wires or

connectors unless power has been switched off or the

area is known to be nonhazardous.

Caution Do not remove modules unless power has

been switched off or the area is known to be

nonhazardous.

NI 9474 Getting Started Guide | © National Instruments | 5

Caution Substitution of components may impair

suitability for Class I, Division 2.

Caution For Division 2 and Zone 2 applications,

install the system in an enclosure rated to at least IP54

as defined by IEC/EN 60079-15.

Caution For Division 2 and Zone 2 applications,

install a protection device between the Vsup and COM

terminals on the NI 9474. The device must prevent the

input Vsup-to-COM voltage from exceeding 42 V if

there is a transient overvoltage condition.

Special Conditions for Hazardous Locations Use in

Europe and Internationally

The NI 9474 has been evaluated as Ex nA IIC T4 Gc equipment

under DEMKO Certificate No. 03 ATEX 0324020X and is

IECEx UL 14.0089X certified. Each NI 9474 is marked II 3G

and is suitable for use in Zone 2 hazardous locations, in ambient

temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9474

in Gas Group IIC hazardous locations, you must use the device in

an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC

T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

6| ni.com | NI 9474 Getting Started Guide

Caution You must make sure that transient

disturbances do not exceed 140% of the rated voltage.

Caution The system shall only be used in an area of

not more than Pollution Degree 2, as defined in

IEC 60664-1.

Caution The system shall be mounted in an

ATEX/IECEx-certified enclosure with a minimum

ingress protection rating of at least IP54 as defined in

IEC/EN 60079-15.

Caution The enclosure must have a door or cover

accessible only by the use of a tool.

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory

requirements and limits for electromagnetic compatibility (EMC)

stated in the product specifications. These requirements and

limits provide reasonable protection against harmful interference

when the product is operated in the intended operational

electromagnetic environment.

This product is intended for use in industrial locations. However,

harmful interference may occur in some installations, when the

NI 9474 Getting Started Guide | © National Instruments | 7

product is connected to a peripheral device or test object, or if the

product is used in residential or commercial areas. To minimize

interference with radio and television reception and prevent

unacceptable performance degradation, install and use this

product in strict accordance with the instructions in the product

documentation.

Furthermore, any changes or modifications to the product not

expressly approved by National Instruments could void your

authority to operate it under your local regulatory rules.

Special Conditions for Marine Applications

Some products are Lloyd’s Register (LR) Type Approved for

marine (shipboard) applications. To verify Lloyd’s Register

certification for a product, visit ni.com/certification and search

for the LR certificate, or look for the Lloyd’s Register mark on

the product.

Caution In order to meet the EMC requirements for

marine applications, install the product in a shielded

enclosure with shielded and/or filtered power and

input/output ports. In addition, take precautions when

designing, selecting, and installing measurement probes

8| ni.com | NI 9474 Getting Started Guide

and cables to ensure that the desired EMC performance

is attained.

Preparing the Environment

Ensure that the environment in which you are using the NI 9474

meets the following specifications.

Operating temperature

(IEC 60068-2-1, IEC 60068-2-2)

-40 °C to 70 °C

Operating humidity

(IEC 60068-2-78)

10% RH to 90% RH,

noncondensing

Pollution Degree 2

Maximum altitude 2,000 m

Indoor use only.

Note Refer to the device datasheet on ni.com/manuals

for complete specifications.

NI 9474 Getting Started Guide | © National Instruments | 9

NI 9474 Pinout

DO0

DO1

DO2

DO3

DO4

DO5

DO6

DO7

Vsup

COM

DO0

DO1

DO2

DO3

DO4

DO5

DO6

DO7

Vsup

COM

10 | ni.com | NI 9474 Getting Started Guide

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