National Instruments NI-9477 Manuel utilisateur

NI-9477 Getting

Started

2022-07-06

Contents

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Guidelines for Hazardous Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Preparing the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

NI 9477 Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Connecting Digital Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Increasing Current Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Protecting the Digital Outputs from Flyback Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Where to Go Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

NI Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ni.com

NI-9477 Getting Started

Overview

This document explains how to connect to the NI-9477.

Note Before you begin, read the NI-9477 Safety, Environmental, and

Regulatory Information document on ni.com/manuals and complete the

soware and hardware installation procedures in your chassis

documentation.

Note The guidelines in this document are specific to the NI-9477. 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

Caution Observe all instructions and cautions in the user documentation.

Using the product in a manner not specified can damage the product and

compromise the built-in safety protection.

Attention Suivez toutes les instructions et respectez toutes les mises

en garde de la documentation d'utilisation. L'utilisation du produit de

toute autre façon que celle spécifiée risque de l'endommager et de

compromettre la protection de sécurité intégrée.

Safety Voltages

Connect only voltages that are within the following limits:

Channel-to-COM[1] 60 V DC maximum, Measurement Category I

Isolation

NI-9477 Getting Started

Channel-to-channel None

Channel-to-earth ground

Continuous 60 V DC, Measurement Category I

Withstand 1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements

within Measurement Categories II, III, or IV.

Attention Ne pas connecter le produit à des signaux dans les catégories

de mesure II, III ou IV et ne pas l'utiliser pour eectuer des mesures dans

ces catégories.

Warning Do not connect the product to signals or use for measurements

within Measurement Categories II, III, or IV, or for measurements on MAINs

circuits or on circuits derived from Overvoltage Category II, III, or IV which

may have transient overvoltages above what the product can withstand.

The product must not be connected to circuits that have a maximum

voltage above the continuous working voltage, relative to earth or to

other channels, or this could damage and defeat the insulation. The

product can only withstand transients up to the transient overvoltage

rating without breakdown or damage to the insulation. An analysis of

the working voltages, loop impedances, temporary overvoltages, and

transient overvoltages in the system must be conducted prior to making

measurements.

Mise en garde Ne pas connecter le produit à des signaux dans les

catégories de mesure II, III ou IV et ne pas l'utiliser pour des mesures dans

ces catégories, ou des mesures sur secteur ou sur des circuits dérivés de

surtensions de catégorie II, III ou IV pouvant présenter des surtensions

transitoires supérieures à ce que le produit peut supporter. Le produit

ne doit pas être raccordé à des circuits ayant une tension maximale

supérieure à la tension de fonctionnement continu, par rapport à la

ni.com

NI-9477 Getting Started

terre ou à d'autres voies, sous peine d'endommager et de compromettre

l'isolation. Le produit peut tomber en panne et son isolation risque

d'être endommagée si les tensions transitoires dépassent la surtension

transitoire nominale. Une analyse des tensions de fonctionnement, des

impédances de boucle, des surtensions temporaires et des surtensions

transitoires dans le système doit être eectuée avant de procéder à des

mesures.

Measurement Category I is for measurements performed on circuits not directly

connected to the electrical distribution system referred to as MAINS voltage. MAINS

is a hazardous live electrical supply system that powers equipment. This category is

for measurements of voltages from specially protected secondary circuits. Such

voltage measurements include signal levels, special equipment, limited-energy

parts of equipment, circuits powered by regulated low-voltage sources, and

electronics.

Note Measurement Categories CAT I and CAT O are equivalent. These test

and measurement circuits are for other circuits not intended for direct

connection to the MAINS building installations of Measurement Categories

CAT II, CAT III, or CAT IV.

1 The maximum voltage that can be applied or output between a channel and COM

without creating a safety hazard.

Safety Guidelines for Hazardous Locations

The NI-9477 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 Gc and Ex nA IIC T4 Gc hazardous locations;

and nonhazardous locations only. Follow these guidelines if you are installing the

NI-9477 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 o or the area is known to be nonhazardous.

NI-9477 Getting Started

Caution Do not remove modules unless power has been switched o or

the area is known to be nonhazardous.

Caution Substitution of components may impair suitability for Class I,

Division 2, or Zone 2.

Caution The system must be installed in an enclosure certified for the

intended hazardous (classified) location, having a tool secured cover/door,

where a minimum protection of at least IP54 is provided.

Special Conditions for Hazardous Locations Use in Europe and

Internationally

The NI-9477 has been evaluated as Ex nA IIC T4 Gc equipment under

DEMKO 03ATEX 0324020X and is IECEx UL 14.0089X certified. Each NI-9477 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-9477 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.

Caution Transient protection shall be provided that is set at a level not

exceeding 140% of the peak rated voltage value of 85 V at the supply

terminals to the equipment.

Caution The system shall only be used in an area of not more than

Pollution Degree 2, as defined in IEC/EN 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.

ni.com

NI-9477 Getting Started

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 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 approved for marine (shipboard) applications. To verify marine

approval certification for a product, visit ni.com/product-certifications, search by

model number, and click the appropriate link.

Notice 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 and cables to

ensure that the desired EMC performance is attained.

NI-9477 Getting Started

Preparing the Environment

Ensure that the environment in which you are using the NI-9477 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 9477 Pinout

DO16

DO17

DO18

DO19

DO20

DO21

DO22

DO23

COM

DO24

DO25

DO26

DO27

DO28

DO29

DO30

DO31

DO0

DO1

DO2

DO3

DO4

DO5

DO6

DO7

COM

DO8

DO9

DO10

DO11

DO12

DO13

DO14

DO15

Signal Description

COM Common reference connection

DO Digital output signal connection

NC No connection

Table 1. NI-9477 Signal Descriptions

ni.com

NI-9477 Getting Started

Connecting Digital Devices

You can connect a variety of industrial devices, such as solenoids, motors, actuators,

relays, and lamps to the NI-9477. You must connect an external power supply to the

NI-9477. The power supply provides the current for the output channels.

Figure 1. Connecting an Industrial Device to the NI-9477

NI 9477

COM

–

External

Power

Supply

Device

Caution Do not install or remove C Series modules from your system if

the external power supply connected to the Vsup and COM pins is powered

on.

Ensure that the devices you connect to the NI-9477 are compatible with the output

specifications of the NI-9477. Refer to the device datasheet at ni.com/manuals for

output specifications.

Increasing Current Drive

Each channel of the NI-9477 has a continuous output current of 1 A. If you want to

increase the output current to a device, you can connect any number of channels

together in parallel.

For example, if you want to drive 4 A of current, connect DO0 through DO3 in

parallel, as shown in the following figure. You must turn all parallel channels on and

o simultaneously so that the current on any single channel cannot exceed the 1 A

rating.

NI-9477 Getting Started

Figure 2. Increasing the Current to a Device Connected to the NI-9477

NI 9477

DO3

DO1

DO0

DO2

4 A

COM

1 A

External

Power

Supply

Device

Protecting the Digital Outputs from Flyback Voltages

If the channel is switching an inductive or energy-storing device such as a solenoid,

motor, or relay, and the device does not have flyback protection, install an external

flyback diode.

Figure 3. Connecting a Flyback Diode

Inductive

Device

–

NI 9477

COM

DO External

Power

Supply

Flyback

Diode

Where to Go Next

NI Services

Visit ni.com/support to find support resources including documentation,

downloads, and troubleshooting and application development self-help such as

tutorials and examples.

Visit ni.com/services to learn about NI service oerings such as calibration options,

repair, and replacement.

Visit ni.com/register to register your NI product. Product registration facilitates

technical support and ensures that you receive important information updates from

NI.

NI corporate headquarters is located at 11500 N Mopac Expwy, Austin, TX,

78759-3504, USA.

ni.com

NI-9477 Getting Started

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