National Instruments NI 9264 Manual de usuario

OPERATING INSTRUCTIONS AND SPECIFICATIONS

NI 9264

16-Channel, ±10 V, 16-Bit Analog Voltage Output Module

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NI 9264 Operating Instructions and Specifications 2 ni.com

This document describes how to use the National Instruments 9264

and includes specifications and terminal assignments for the

NI 9264. 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 9264. 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 9264 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 9264 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 9940 connector

backshell kit to ensure that the terminals are not accessible.

Figure 1 shows the NI 9940 connector backshell.

Figure 1. NI 9940 Connector Backshell

Safety Guidelines for Hazardous Locations

The NI 9264 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 9264 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.

Caution For Zone 2 applications, connected signals must

be within the following limit:

Capacitance .......................... 0.2 μF max

NI 9264 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. If youare using the NI 9264 in Gas Group IIC hazardous

locations or in ambient temperatures of –40 °C ≤Ta ≤70 °C, you

must use the device in an NI chassis that has been evaluated as

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.

Connecting the NI 9264

The NI 9264 has a 36-terminal detachable spring-terminal

connector that provides connections for 16 analog output channels.

Figure 2. NI 9264 Terminal Assignments

AO0

AO1

AO2

AO3

AO4

AO5

AO6

AO7

AO8

AO9

AO10

AO11

AO12

AO13

AO14

AO15

COM

NI 9264 Operating Instructions and Specifications 8 ni.com

Each channel of the NI 9264 has a terminal to which youcan

connect the positive lead of a load. Each channel also has a

common terminal, COM, and there are four additional COM

terminals at the bottom of the connector. All of the COM terminals

are internally connected to the isolated ground reference of the

module. When connecting a load to the NI 9264, connect the

positive lead of the load to the AO terminal, and the ground of the

load to a COM terminal. Refer to Figure 3 for an illustration of

connecting a load to the NI 9264.

Figure 3. Connecting a Load to the NI 9264

Each channel has a digital-to-analog converter (DAC) that

produces a voltage signal. Each channel also has overvoltage

and short-circuit protection. Refer to the Specifications section

for more information about overvoltage and short-circuit

COM

Load

NI 9264

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

circuitry for one channel of the NI 9264.

Figure 4. Output Circuitry for One Channel of the NI 9264

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.

COM

NI 9264

Amp

Isolated

DAC

Overvoltage/

Short-Circuit

Protection

NI 9264 Operating Instructions and Specifications 10 ni.com

Connecting Wires to the NI 9264 Connector

Use a flathead screwdriver with a blade smaller than 2.3 × 1.0 mm

(0.09 × 0.04 in.) to connect wires to the detachable spring-terminal

connector. Insert the screwdriver into a spring clamp activation

slot and press a wire into the corresponding connector terminal,

then remove the screwdriver to clamp the wire into the terminal.

Refer to the Specifications section for more information about

spring-terminal wiring. Refer to Figure 5 for an illustration of

connecting wires to the NI 9264.

Figure 5. Connecting Wires to the NI 9264 Connector

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