National Instruments NI-9238 Bedienungsanleitung

NI-9238 Getting

Started

2022-07-06

Contents

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

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

Safety Guidelines for Hazardous Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Guidelines for Hazardous Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Cable Requirements for EMC Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Special Conditions for Marine Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

NI 9238 Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Grounded Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Floating Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

NI-9238 Connection Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

High-Vibration Application Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Overvoltage Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Where to Go Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

ni.com

NI-9238 Getting Started

Overview

This document explains how to connect to the NI-9238.

Note Before you begin, read the NI-9238 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-9238. 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 Guidelines for Hazardous Voltages

If hazardous voltages are connected to the product, take the following precautions.

A hazardous voltage is a voltage greater than:

■ 30 V RMS, 42.4 V peak, or 60 V DC in DRY LOCATIONS

■ 16 V RMS, 22.6 V peak, or 35 V DC in WET LOCATIONS

NI-9238 Getting Started

Caution Ensure that hazardous voltage wiring is performed only by

qualified personnel adhering to local electrical standards.

Attention S'assurer que le câblage à tension dangereuse est eectué par

du personnel qualifié respectant les normes électriques locales.

Caution Do not mix hazardous voltage circuits and human-accessible

circuits on the same product.

Attention Ne pas combiner des circuits avec des tensions dangereuses et

des circuits accessibles aux personnes sur le même produit.

Caution When product terminals are hazardous voltage LIVE, you must

ensure that devices and circuits connected to the product are properly

insulated from human contact.

Attention Lorsqu'une haute tension dangereuse est appliquée aux

bornes du produit, vous devez vous assurer que les appareils et les circuits

auxquels il est connecté sont correctement isolés de tout contact humain.

Caution You must use the NI 9971 connector backshell kit to ensure that

the terminals are not accessible.

Safety Guidelines for Hazardous Locations

The NI-9238 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.com

NI-9238 Getting Started

NI-9238 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.

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-9238 has been evaluated as Ex nA IIC T4 Gc equipment under

DEMKO 12ATEX 1202658X and is IECEx UL 14.0089X certified. Each NI-9238 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-9238 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.

NI-9238 Getting Started

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 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.

Cable Requirements for EMC Compliance

Install cables for the NI-9238 in accordance with the following requirements:

■Connect the cable shield to the chassis ground (grounding screw of the

chassis).

■Install an EMI Noise-Suppression Ferrite (part number 782802-01) on the

input cable for each channel connected to the NI-9238.

■Position the ferrite as close to the module as possible. Placing the ferrite

elsewhere decreases its eectiveness.

ni.com

NI-9238 Getting Started

Figure 1. NI-9238 Cable Connections for EMC Compliance

NI 9238

Shield

AI0+

AI0–

Ferrite

Shield

AI1+

AI1–

Ferrite

Shield

AI2+

AI2–

Ferrite

Signal

Source

Signal

Source

Signal

Source

Shield

AI3+

AI3–

Ferrite

Signal

Source

Related concepts

■NI-9238 Connection Guidelines

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.

Preparing the Environment

Ensure that the environment in which you are using the NI-9238 meets the following

specifications.

Operating temperature (IEC 60068-2-1, IEC 60068-2-2) -40 °C to 70 °C

Operating humidity (IEC 60068-2-30) 10% RH to 90% RH, noncondensing

NI-9238 Getting Started

Pollution Degree 2

Maximum altitude 5,000 m

Indoor use only.

Note Refer to the NI-9238 Specifications on ni.com/manuals for

complete specifications.

NI 9238 Pinout

AI0+

AI0–

AI1+

AI1–

AI2+

AI2–

AI3+

AI3–

Signal Description

AI+ Positive analog input signal connection

AI- Negative analog input signal connection

Table 1. Signal Descriptions

Grounded Connections

NI 9238

Signal Source

AI–

–

AI+

ni.com

NI-9238 Getting Started

Floating Connections

NI 9238

Signal Source

AI–

–

AI+

NI-9238 Connection Guidelines

■ Make sure that devices you connect to the NI-9238 are compatible with the

module specifications.

■ You must use 2-wire ferrules to create a secure connection when connecting

more than one wire to a single terminal on the NI-9238.

Related reference

■Cable Requirements for EMC Compliance

High-Vibration Application Connections

If your application is subject to high vibration, NI recommends that you follow these

guidelines to protect connections to the NI-9238:

■Use ferrules to terminate wires to the detachable connector.

■Use the NI 9971 connector backshell kit.

Overvoltage Protection

The NI-9238 provides overvoltage protection for each channel.

Note Refer to the NI-9238 Specifications on ni.com/manuals for more

information about overvoltage protection.

Where to Go Next

NI-9238 Getting Started

Located at ni.com/manuals Installs with the software

CompactRIO NI CompactDAQ

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NI 9238 Datasheet

NI-RIO Help

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NI-DAQmx Help

LabVIEW Help

C SeriesDocumentation

& Resources

ni.com/info cseriesdoc

Servi ces

ni.com/services

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-9238 Getting Started

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