NI 9269 Manuel utilisateur

OPERATING INSTRUCTIONS AND SPECIFICATIONS

NI 9269

4-Channel, ±10 V, 16-Bit, Simultaneous, Channel-

to-Channel Isolated Analog Voltage Output Module

ni.com/manuals

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NI 9269 Operating Instructions and Specifications 2 ni.com

This document describes how to use the National Instruments 9269

and includes specifications and terminal assignments for the NI 9269.

Visit ni.com/info and enter rdsoftwareversion to determine

which software youneed for the modules youare using. For

information about installing, configuring, and programming the

system, refer to the system documentation. Visit ni.com/info and

enter cseriesdoc for information about C Series documentation.

Note The safety guidelines and specifications in this

document are specific to the NI 9269. 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 9269 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.

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.

NI 9269 Operating Instructions and Specifications 4 ni.com

Caution When module terminals are hazardous voltage

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

and circuits connected to the module are properly

insulated from human contact. Youmust use the NI 9971

connector backshell kit to ensure that the terminals are

not accessible.

Figure 1 shows the NI 9971 connector backshell.

Figure 1. NI 9971 Connector Backshell

Safety Guidelines for Hazardous Locations

The NI 9269 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 9269 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 Zone 2 applications, install the system in an

enclosure rated to at least IP 54 as defined by IEC 60529

and EN 60529.

NI 9269 Operating Instructions and Specifications 6 ni.com

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 9269 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.

Special Conditions for Marine Applications

Some modules are Lloyd’s Register (LR) Type Approved for

marine applications. To verify Lloyd’s Register certification, visit

ni.com/certification and search for the LR certificate, or

look for the Lloyd’s Register mark on the module.

Caution To meet radio frequency emission requirements

for marine applications, use shielded cables and install

the system in a metal enclosure. Suppression ferrites

must be installed on power supply inputs near power

entries to modules and controllers. Power supply and

module cables must be separated on opposite sides of the

enclosure and must enter and exit through opposing

enclosure walls.

NI 9269 Operating Instructions and Specifications 8 ni.com

Connecting the NI 9269

The NI 9269 has four 2-terminal detachable screw-terminal

connectors that provide connections for 4 analog output channels.

Figure 2. NI 9269 Terminal Assignments

AO0+

AO0–

AO1+

AO1–

AO2+

AO2–

AO3+

AO3–

Yo ucan connect a load to each channel of the NI 9269. Connect the

positive lead of the load to the AO+ terminal. Connect the ground

of the load to the corresponding AO– terminal. Refer to Figure 3

for an illustration of how to connect a load to the NI 9269.

Figure 3. Connecting a Load to the NI 9269

Note Youmust use 2-wire ferrules to create a secure

connection when connecting more than one wire to a

single terminal on the NI 9269.

The analog output channels are floating with respect to earth

ground and each other. Each channel has a digital-to-analog

converter (DAC) that produces a voltage signal. Each channel

provides an independent signal path, enabling youto update all

four channels simultaneously. Each channel also has overvoltage

AO–

AO+

Load

NI 9269

NI 9269 Operating Instructions and Specifications 10 ni.com

and short-circuit protection. Refer to the Specifications section for

more information about the overvoltage and short-circuit

protection. Refer to Figure 4 for an illustration of the output

circuitry for one channel of the NI 9269.

Figure 4. Output Circuitry for One Channel of the NI 9269

When the module powers on, the channels output the startup

voltage. Refer to the Specifications section for more information

about startup voltage. Refer to the software help for information

about configuring startup output states in software. Visit

ni.com/info and enter cseriesdoc for information about

C Series documentation.

AO+

NI 9269

Amp

Isolated

DAC

Overvoltage/

Short-Circuit

Protection AO–

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