NI 9232 Manuel utilisateur

OPERATING INSTRUCTIONS AND SPECIFICATIONS

NI 9232

3-Channel, ±30 V, 24-Bit Software Selectable IEPE

and AC/DC Analog Input Module

ni.com/manuals

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NI 9232 Operating Instructions and Specifications 2 ni.com

This document describes how to use the National Instruments 9232

and includes specifications and terminal assignments for the

NI 9232. For information about installing, configuring, and

programming the system, refer to the system documentation. Visit

ni.com/info and enter the following Info Codes:

•cseriesdoc—for information about C Series and system

documentation.

•compatibility—for information about chassis and carrier

compatibility for the modules youare using.

•rdsoftwareversion—for information about which software

youneed for the modules youare using.

Note The safety guidelines and specifications in this

document are specific to the NI 9232. 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. Visit

ni.com/info and enter cseriesdoc for information

about C Series documentation.

Safety Guidelines

Operate the NI 9232 only as described in these operating

instructions.

Hot Surface This icon denotes that the component may be

hot. Touching this component may result in bodily injury.

Caution Do not operate the NI 9232 in a manner not

specified in these operating instructions. Product misuse

can result in a hazard. Youcan 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.

Safety Guidelines for Hazardous Locations

The NI 9232 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 youare installing the NI 9232 in a

potentially explosive environment. Not following these guidelines

may result in serious injury or death.

NI 9232 Operating Instructions and Specifications 4 ni.com

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 60529 and EN 60529.

Caution For Division 2 and Zone 2 applications,

connected IEPE sensors must be within the following

limit:

Capacitance..........................0.08 F max

Caution For Division 2 and Zone 2 applications,

connected low impedance sources must include a

protection device installed between the source and the

AI terminals. The protection device must prevent the AI+

to AI– voltage from exceeding 42 V if there is a transient

overvoltage condition.

Special Conditions for Hazardous Locations Use in Europe

This equipment has been evaluated as Ex nA IIC T4 equipment

under DEMKO Certificate No. 07 ATEX 0626664X. 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 9232 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.

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

NI 9232 Operating Instructions and Specifications 6 ni.com

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.

Caution To ensure the specified EMC performance,

operate this product only with double-shielded, twisted

pair cables and shielded accessories.

Caution To ensure the specified EMC performance,

install snap-on, ferrite beads (National Instruments part

number 611461-01) in accordance with the product

installation instructions.

Caution Electrostatic Discharge (ESD) can damage this

product. To prevent damage, use industry-standard ESD

prevention measures during installation, maintenance,

and operation.

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.

Cable Requirements for EMC Compliance

Select and install cables for the NI 9232 in accordance with the

following requirements:

• Connect the cable shield to the chassis ground (grounding

screw of the chassis) as shown in Figure 1.

• Install a clamp-on ferrite bead (National Instruments part

number 611461-01) on the input cables for each channel that you

are connecting to on the NI 9232. Refer to Figure 1 for a diagram.

NI 9232 Operating Instructions and Specifications 8 ni.com

Figure 1. NI 9232 Cable Connections

• Clamp-on ferrite beads must be installed on the cable as close

to the module as possible.

NI 9232

Shield

AI0+

AI0–

Ferrite

Shield

AI1+

AI1–

Ferrite

Shield

AI2+

AI2–

Ferrite

Signal

Source

Signal

Source

Signal

Source

Connecting the NI 9232

The NI 9232 has three 2-terminal detachable screw-terminal

connectors that provide connections to three simultaneously

sampled analog input channels.

Figure 2. NI 9232 Terminal Assignments

AI0+

AI0–

AI1+

AI1–

AI2+

AI2–

NI 9232 Operating Instructions and Specifications 10 ni.com

Each channel has a 2-terminal screw-terminal connector to which

youcan connect a signal source. Youcan also enable excitation

current on a per-channel basis to power Integrated Electronics

Piezoelectric (IEPE) sensors. Refer to the NI 9232 Circuitry

section for more information. The AI+ terminal of the connector

provides the DC excitation, when enabled, and the positive input

signal connection. The AI– terminal provides the excitation return

path and the signal ground reference.

Connecting Signal Sources to the NI 9232

Youcan connect ground-referenced or floating signal sources to

the NI 9232.

If youmake a ground-referenced connection between the signal

source and the NI 9232, make sure the voltage on the AI+ and AI–

connections are in the channel-to-earth safety voltage range to

ensure proper operation of the NI 9232. Refer to the Specifications

section for more information about operating voltages and

overvoltage protection. Refer to Figures 3 and 4 for illustrations of

connecting grounded and floating signal sources to the NI 9232.

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