National Instruments CompactRIO cRIO-9263 Manuale utente

OPERATING INSTRUCTIONS

CompactRIO cRIO-9263

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

™

cRIO-9263 Operating Instructions 2 ni.com

These operating instructions describe how to use the National

Instruments cRIO-9263 module. For information about installing,

configuring, and programming the CompactRIO system, refer to

the CompactRIO Bookshelf at Start»Program Files»National

Instruments»CompactRIO»Search the CompactRIO

Bookshelf.

Safety Guidelines

Operate the cRIO-9263 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 Locations

The cRIO-9263 is suitable for use in Class I, Division 2, Groups A,

B, C, and D hazardous locations; Class 1, Zone 2, AEx nC IIC T4

and Ex nC IIC T4 hazardous locations; and nonhazardous locations

only. Follow these guidelines if you are installing the cRIO-9263

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

CompactRIO system in an enclosure rated to at least

IP 54 as defined by IEC 60529 and EN 60529.

Special Conditions for Safe Use in Europe

This equipment has been evaluated as EEx nC IIC T4 equipment

under DEMKO Certificate No. 03 ATEX 0324020X. Each module

is marked II 3G and is suitable for use in Zone 2 hazardous

locations.

cRIO-9263 Operating Instructions 4 ni.com

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 Vpeak 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.

Caution When module terminals are live with hazardous

voltages, make sure that the terminals are not accessible.

You can use the cRIO-9932 connector kit or put the

CompactRIO chassis in a suitably rated enclosure.

Wiring the cRIO-9263

The cRIO-9263 has a 10-terminal, detachable screw-terminal

connector that provides connections for four analog output

channels. Each channel has a terminal to which you can connect

the positive lead of a voltage signal, AO. The cRIO-9263 also has

common terminals, COM, that are internally connected to the

isolated ground reference of the module. Refer to Table 1 for the

terminal assignments for each channel.

cRIO-9263 Operating Instructions 6 ni.com

Table 1. Terminal Assignments

Module Terminal Signal

0AO0

1Common (COM)

2AO1

3Common (COM)

4AO2

5Common (COM)

6AO3

7Common (COM)

8No Connection

9Common (COM)

Connecting a Load to the cRIO-9263

You can connect loads to the cRIO-9263. Connect the positive lead

of the load to the AO terminal. Connect the ground of the load to a

COM terminal.

Figure 1. Connecting a Load to the cRIO-9263

cRIO-9263 Circuitry

The cRIO-9263 channels share a common ground that is isolated

from the other modules in the CompactRIO system. Each channel

has a digital-to-analog converter (DAC) that produces a voltage

signal. You must write binary values to the analog output channels.

Refer to the CompactRIO Bookshelf for more information about

converting and calibrating cRIO-9263 output values in software.

cRIO-9263

COM

Load

cRIO-9263 Operating Instructions 8 ni.com

Each channel also has overvoltage and short-circuit protection.

For more information about the overvoltage and short-circuit

protection, refer to the Specifications section.

Figure 2. Output Circuitry for One Channel

When the module powers on, the output channel drives the

power-on voltage. Refer to the Specifications section for more

information about power-on voltage. Refer to the CompactRIO

Bookshelf for more information about configuring initial output

values in software.

COM

cRIO-9263

Amplifier

Isolated DAC

Overvoltage/

Short-Circuit

Protection

Sleep Mode

You can enable sleep mode for the CompactRIO system in

software. Typically, when a system is in sleep mode, you cannot

communicate with the modules. In sleep mode, the system

minimizes power consumption. The system thermal dissipation

may decrease. Refer to the Specifications section for more

information about power consumption and thermal dissipation.

Refer to the CompactRIO Bookshelf for more information about

enabling sleep mode in software.

Specifications

The following specifications are typical for the range –40 to 70 °C

unless otherwise noted.

Output Characteristics

Number of channels .......................... 4 analog output channels

DAC resolution ................................. 16 bits

Type of DAC ..................................... String

cRIO-9263 Operating Instructions 10 ni.com

Operating voltage

Nominal...................................... ±10.7 V

Minimum.................................... ±10.3 V

Maximum ................................... ±11 V

Current drive ..................................... ±1 mA per channel min

Output impedance............................. 0.1 Ω

Accuracy

Stability

Offset drift .................................. 80 µV/°C

Gain drift .................................... 6 ppm/°C

Error

Percentage of

Reading

Percent of

Range*

Calibrated, max (–40 to 70 °C) 0.35% 0.75%

Calibrated, typ (25 °C, ±5°C) 0.01% 0.1%

Uncalibrated, max (–40 to 70 °C) 2.2% 1.7%

Uncalibrated, typ (25 °C, ±5°C) 0.3% 0.25%

* Range equals ±10.7 V

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