National Instruments NI 9425 Manual de usuario

GETTING STARTED GUIDE

NI 9425

24 V, 32-Channel (Sinking Input), 7 µs C Series

Digital Module

This document explains how to connect to the NI 9425. In this

document, the NI 9425 with spring terminal and the NI 9425 with

DSUB are referred to inclusively as the NI 9425.

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 9425. 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 9425 only as described in this document.

Caution This icon denotes a caution, which advises

you to consult documentation where this symbol is

marked.

2| ni.com | NI 9425 Getting Started Guide

Caution Do not operate the NI 9425 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

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.

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 All wiring must be insulated for the highest

voltage used.

Caution Do not mix hazardous voltage circuits and

human-accessible circuits on the same module.

NI 9425 Getting Started Guide | © National Instruments | 3

Caution Ensure that devices and circuits connected to

the module are properly insulated from human contact.

Caution When module terminals are hazardous

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

that devices and circuits connected to the module are

properly insulated from human contact.

NI 9425 with Spring Terminal Safety Voltages

Connect only voltages that are within the following limits.

Channel-to-channel

Up to 8 channels

simultaneously

±60 V maximum

All channels

simultaneously

±30 V maximum

Isolation

Channel-to-channel None

4| ni.com | NI 9425 Getting Started Guide

Channel-to-earth ground

Continuous 250 V RMS,

Measurement Category II

Withstand up to

5,000 m

3,000 V RMS, verified by a 5 s

dielectric withstand test

Measurement Category II is for measurements performed on

circuits directly connected to the electrical distribution system.

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 9425 with spring

terminal to signals or use for measurements within

Measurement Categories III or IV.

NI 9425 Getting Started Guide | © National Instruments | 5

NI 9425 with DSUB Safety Voltages

Connect only voltages that are within the following limits.

Channel-to-channel

Up to 8 channels

simultaneously

±60 V maximum

All channels

simultaneously

±30 V maximum

Isolation

Channel-to-channel None

Channel-to-earth ground

Continuous 60 V DC,

Measurement Category I

Withstand up to

2,000 m

1,000 V RMS, verified by a 5 s

dielectric withstand test

Withstand up to

5,000 m

500 V RMS, verified by a 5 s

dielectric withstand test

Measurement Category I is for measurements performed on

circuits not directly connected to the electrical distribution system

6| ni.com | NI 9425 Getting Started Guide

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.

Caution Do not connect the NI 9425 with DSUB to

signals or use for measurements within Measurement

Categories II, III, or IV.

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.

Safety Guidelines for Hazardous Locations

The NI 9425 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 9425 in a potentially explosive environment. Not following

these guidelines may result in serious injury or death.

NI 9425 Getting Started Guide | © National Instruments | 7

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.

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 9425 with spring terminal has been evaluated as Ex nA

IIC T4 Gc equipment under DEMKO 12 ATEX 1202658X and is

IECEx UL 14.0089X certified. The NI 9425 with DSUB has been

evaluated as Ex nA IIC T4 Gc equipment under DEMKO 03

ATEX 0324020X and is IECEx UL 14.0089X certified. Each

NI 9425 is marked II 3G and is suitable for use in Zone 2

8| ni.com | NI 9425 Getting Started Guide

hazardous locations, in ambient temperatures of -40 °C ≤ Ta ≤

70 °C. If you are using the NI 9425 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.

Caution The enclosure must have a door or cover

accessible only by the use of a tool.

NI 9425 Getting Started Guide | © National Instruments | 9

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.

10 | ni.com | NI 9425 Getting Started Guide

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