NI 9269 Manual de usuario
OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9269
4-Channel, ±10 V, 16-Bit, Simultaneous, Channel-
to-Channel Isolated Analog Voltage Output Module
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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.
© National Instruments Corp. 3 NI 9269 Operating Instructions and Specifications
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
© National Instruments Corp. 5 NI 9269 Operating Instructions and Specifications
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.
© National Instruments Corp. 7 NI 9269 Operating Instructions and Specifications
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–
0
1
0
1
0
1
0
1
© National Instruments Corp. 9 NI 9269 Operating Instructions and Specifications
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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