NI 9269 User manual

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–

© National Instruments Corp. 11 NI 9269 Operating Instructions and Specifications
Wiring for High-Vibration Applications
If an application is subject to high vibration, National Instruments
recommends that youeither use ferrules to terminate wires to the
detachable screw-terminal connector or use the NI 9971 backshell
kit to protect the connections. Refer to Figure 5 for an illustration
of using ferrules. Refer to Figure 1 for an illustration of the
NI 9971 connector backshell.
Figure 5. 2-Terminal Detachable Screw-Terminal Connector with Ferrule

NI 9269 Operating Instructions and Specifications 12 ni.com
Increasing Output Voltage Range
Each channel of the NI 9269 has a nominal output voltage range of
±10 V and can drive up to ±10 mA of current. The total output
current of all channels is limited to ±20 mA. For example, if the
output current of AO0 is ±10 mA, the output current of
AO<1, 2, 3> is limited to ±10 mA total or ±3.33 mA each.
If youwant to increase the nominal output voltage range, youcan
cascade up to four output channels for a maximum of ±40 V
nominal. For example, if youwant two channels with a nominal
output voltage range of ±20 V each, connect AO<0, 1> and
AO<2, 3> as shown in Figure 6. The output current of the cascaded
channels flows across two channels, limiting the total output
current to ±10 mA.

© National Instruments Corp. 13 NI 9269 Operating Instructions and Specifications
Figure 6. Increasing the Output Voltage Range of the NI 9269
Cascading more than four output channels of multiple NI 9269
modules violates the electrical safety and overvoltage protection
ratings.
Because the NI 9269 outputs can source and sink current, it is not
possible to increase the current drive by connecting output
channels in parallel.
AO<2, 3>–
NI 9269
AO<2, 3>+
AO<0, 1>–
AO<0, 1>+
AO0+
AO0–
AO1+
AO1–
AO2+
AO2–
AO3+
AO3–
Load
Load

NI 9269 Operating Instructions and Specifications 14 ni.com
Sleep Mode
This module supports a low-power sleep mode. Support for sleep
mode at the system level depends on the chassis that the module is
plugged into. Refer to the chassis manual for information about
support for sleep mode. If the chassis supports sleep mode, refer to
the software help for information about enabling sleep mode. Visit
ni.com/info and enter cseriesdoc for information about
C Series documentation.
Typically, when a system is in sleep mode, youcannot
communicate with the modules. In sleep mode, the system
consumes minimal power and may dissipate less heat than it does
in normal mode. Refer to the Specifications section for more
information about power consumption and thermal dissipation.

© National Instruments Corp. 15 NI 9269 Operating Instructions and Specifications
Specifications
The following specifications are typical for the range –40 to 70 °C
unless otherwise noted. All voltages are relative to the AO– signal
on each channel unless otherwise noted.
Output Characteristics
Number of channels.......................... 4 analog output channels
DAC resolution ................................. 16 bits
Type of DAC ..................................... R-2R
Power-on output state ....................... High impedance
Startup voltage1................................. 0 V
Power-down output state2................. High impedance
1 When the output stage powers on, a glitch occurs for 5 μs peaking at –900 mV.
2 When the module powers down, a glitch occurs for 20 μs peaking at –600 mV.

NI 9269 Operating Instructions and Specifications 16 ni.com
Output voltage range1
Nominal...................................... ±10 V
Minimum.................................... ±10.38 V
Typical ........................................ ±10.47 V
Maximum ................................... ±10.56 V
Current drive ..................................... ±20 mA all channels max;
±10 mA per channel typ
Output impedance............................. 100 mΩ
1 Refer to the Increasing Output Voltage Range section for the cascaded nominal
output voltage range and current drive.

© National Instruments Corp. 17 NI 9269 Operating Instructions and Specifications
Accuracy
Stability
Gain drift .................................... 14 ppm/°C
Offset drift .................................. 80 μV/°C
Protection
Overvoltage ................................ ±30 V
Short-circuit................................ Indefinitely
Measurement Conditions
Percent of
Reading
(Gain Error)
Percent of
Range*
(Offset Error)
Calibrated, max (–40 to 70 °C) 0.17% 0.15%
Calibrated, typ (25 °C, ±5 °C) 0.05% 0.01%
Uncalibrated, max (–40 to 70 °C) 0.44% 0.37%
Uncalibrated, typ (25 °C, ±5 °C) 0.14% 0.05%
*Range equals 10.47 V

NI 9269 Operating Instructions and Specifications 18 ni.com
Update time
Noise................................................. 300 μVrms
Slew rate ........................................... 7 V/μs
Crosstalk
Channel-to-channel .................... 100 dB
Common-mode voltage .............. 120 dB
Settling time
100 pF load, to 1 LSB
Full-scale step ...................... 20 μs
1 V step ................................ 10 μs
0.1 V step ............................. 10 μs
Number of
Channels
Update Time for
NI cRIO-9151 R Series
Expansion Chassis
Update Time for All
Other Chassis
13.5 μs min 3 μs min
26.5 μs min 5 μs min
39.3 μs min 7.5 μs min
412.3 μs min 9.7 μs min

© National Instruments Corp. 19 NI 9269 Operating Instructions and Specifications
1 kΩ|| 100 pF load, to 4 LSB
Full-scale step ...................... 20 μs
Capacitive drive ................................ 1,500 pF max
Monotonicity..................................... 16 bits
DNL .................................................. ±1 LSB max
INL (best fit) ..................................... ±2 LSBs max
MTBF ............................................... Contact NI for Bellcore
MTBF or MIL-HDBK-217F
specifications.
Power Requirements
Power consumption from chassis
Active mode ............................... 1 W max
Sleep mode ................................. 120 μW max
Thermal dissipation (at 70 °C)
Active mode ............................... 1.4 W max
Sleep mode ................................. 77 mW max

NI 9269 Operating Instructions and Specifications 20 ni.com
Physical Characteristics
If youneed to clean the module, wipe it with a dry towel.
Note For two-dimensional drawings and
three-dimensional models of the C Series module and
connectors, visit ni.com/dimensionsand search by
module number.
Screw-terminal wiring ...................... 12 to 24 AWG copper
conductor wire with 10 mm
(0.39 in.) of insulation
stripped from the end
Torque for screw terminals ............... 0.5 to 0.6 N · m
(4.4 to 5.3 lb · in.)
Ferrules ............................................. 0.25 mm2to 0.5 mm2
Weight............................................... 147 g (5.2 oz)