National Instruments NI 9242 Manuale utente

USER MANUAL AND SPECIFICATIONS

NI 9242

4-Channel, 250 Vrms, 24-Bit Simultaneous Analog

Input Module

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2|ni.com |NI 9242 User Manual and Specifications

This document describes how to use the National Instruments 9242

and includes specifications and pin assignments for the NI 9242.

Note The safety guidelines and specifications in this

document are specific to the NI 9242. The other

components in the system might not meet the same safety

ratings and specifications. Refer to the documentation for

each component in the system to determine the safety

ratings and specifications for the entire system.

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NI 9242 User Manual and Specifications |© National Instruments |3

Safety Guidelines

Operate the NI 9242 only as described in this manual.

Hot Surface This icon denotes that the component may

be hot. Touching this component may result in bodily

injury.

Warning This icon denotes a warning advising you to

take precautions to avoid electrical shock.

Caution Do not operate the NI 9242 in a manner not

specified in this manual. 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 National Instruments

for repair.

4|ni.com |NI 9242 User Manual and Specifications

Safety Guidelines for Hazardous Voltages

If hazardous voltages are connected to the module, take the

following precautions. A hazardous voltage is a voltage greater

than 42.4 Vpk 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 Make sure that devices and circuits connected

to the module are properly insulated from human contact.

Caution When module terminals are hazardous voltage

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

and circuits connected to the module are properly

insulated from human contact. You must use the NI 9967

connector backshell kit to ensure that the terminals are

not accessible.

NI 9242 User Manual and Specifications |© National Instruments |5

Figure 1 shows the NI 9967 connector backshell.

Figure 1. NI 9967 Connector Backshell

6|ni.com |NI 9242 User Manual and Specifications

Safety Guidelines for Hazardous Locations

The NI 9242 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 9242 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.

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 IP 54 as

defined by IEC/EN 60529.

NI 9242 User Manual and Specifications |© National Instruments |7

Special Conditions for Hazardous Locations Use in

Europe

This equipment has been evaluated as Ex nA IIC T4 Gc equipment

under DEMKO 12 ATEX 1202658X. Each module 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 9242 in Gas Group IIC hazardous locations, you must use the

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

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

Caution The system shall be mounted in an ATEX

certified enclosure with a minimum ingress protection rating

of at least IP54 as defined in IEC/EN 60529 and used in an

environment of not more than Pollution Degree 2.

Caution The enclosure must have a door or cover

accessible only by the use of a tool.

8|ni.com |NI 9242 User Manual and Specifications

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory

requirements and limits for electromagnetic compatibility (EMC)

as stated in the product specifications. These requirements and

limits are designed to provide reasonable protection against

harmful interference when the product is operated in its intended

operational electromagnetic environment.

This product is intended for use in industrial locations. There is no

guarantee that harmful interference will not occur in a particular

installation, when the product is connected to a test object, or if the

product is used in residential areas. To minimize the potential for

the product to cause interference to radio and television reception

or to experience 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.

NI 9242 User Manual and Specifications |© National Instruments |9

Special Guidelines 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 label.

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

and cables to ensure that the desired EMC performance is

attained.

10 |ni.com |NI 9242 User Manual and Specifications

Connecting the NI 9242

The NI 9242 provides connections for four analog input channels.

Figure 2. NI 9242 Pinout

AI0

AI1

AI2

Neutral

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