National Instruments NI 9231 Manual de usuario

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GETTING STARTED GUIDE

NI 9231

8 AI, ±5 V, 24 Bit, 51.2 kS/s/ch Simultaneous,

AC/DC Coupling, IEPE AC Coupling

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This document explains how to connect to the NI 9231.

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 9231. 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 9231 only as described in this document.

Caution This icon denotes a caution, which advises

you to consult documentation where this symbol is

marked.

Caution Do not operate the NI 9231 in a manner not

specified in this document. Product misuse can result in

a hazard. You can compromise the safety protection

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built into the product if the product is damaged in any

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

repair.

NI 9231 with 10-32 Coaxial Jack Safety Voltages

Connect only voltages that are within the following limits:

Channel-to-earth ground ±30 V maximum,

Measurement Category I

Isolation

Channel-to-channel None

Channel-to-earth

ground

None

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.

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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.

Caution Do not connect the NI 9231 to signals or use

for measurements within Measurement Categories II,

III, or IV.

Safety Guidelines for Hazardous Locations

The NI 9231 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 9231 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.

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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 9231 has been evaluated as Ex nA IIC T4 Gc equipment

under DEMKO 12 ATEX 1202658X and is IECEx UL 14.0089X

certified. Each NI 9231 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 9231 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.

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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.

EMC 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

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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.

Notice To ensure the specified EMC performance,

operate this product only with shielded cables and

accessories.

Notice To ensure the specified EMC performance, the

length of all I/O cables must be no longer than 3 m

(10 ft).

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Notice Conducted RF interference on the NI 9231 can

adversely affect its I/O ports' measurement accuracy.

Preparing the Environment

Ensure that the environment in which you are using the NI 9231

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

Pollution Degree 2

Maximum altitude 5,000 m

Indoor use only.

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

for complete specifications.

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NI 9231 Pinout

AI1+

AI1–

AI3+

AI3–

AI5+

AI5–

AI7+

AI7–

AI0+

AI0–

AI2+

AI2–

AI4+

AI4–

AI6+

AI6–

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