National Instruments 9269E User manual

OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9269E
4-Channel, ±10 V, 16-Bit, Simultaneous, Channel-
to-Channel Isolated Analog Voltage Output Module

NI 9269E Operating Instructions and Specifications 2 ni.com
This document describes how to use the National Instruments 9269E
and includes dimensions, terminal assignments, and specifications for
the NI 9269E. Visit ni.com/info and enter rdsoftwareversion
to determine which software you need for the modules you are 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.
Caution National Instruments makes no electromagnetic
compatibility (EMC) or CE marking compliance claims
for the NI 9269E. The end-product supplier is responsible
for conformity to any and all compliance requirements.
Caution The NI 9269E must be installed inside a suitable
enclosure prior to use. Hazardous voltages may be present.

© National Instruments Corp. 3 NI 9269E Operating Instructions and Specifications
NI 9269E Dimensions
The following figure shows the dimensions of the NI 9269E.
Figure 1. NI 9269E Dimensions in Millimeters (Inches)
0.0 (0.00)
26.7 (1.05) 58.4 (2.30) 66.0 (2.60)
73.4 (2.89)
0.0 (0.00)

NI 9269E Operating Instructions and Specifications 4 ni.com
Connecting the NI 9269E
The NI 9269E has four 2-terminal detachable screw-terminal
connectors that provide connections for 4 analog output channels.
Figure 2. NI 9269E Terminal Assignments
AO0+
AO0–
AO1+
AO1–
AO2+
AO2–
AO3+
AO3–
0
1
0
1
0
1
0
1

© National Instruments Corp. 5 NI 9269E Operating Instructions and Specifications
You can connect a load to each channel of the NI 9269E. 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 9269E.
Figure 3. Connecting a Load to the NI 9269E
Note You must use 2-wire ferrules to create a secure
connection when connecting more than one wire to a
single terminal on the NI 9269E.
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 you to update all
AO–
AO+
Load
NI 9269E

NI 9269E Operating Instructions and Specifications 6 ni.com
four channels simultaneously. Each channel also has overvoltage
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 9269E.
Figure 4. Output Circuitry for One Channel of the NI 9269E
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 9269E
Amp
Isolated
DAC
Overvoltage/
Short-Circuit
Protection AO–

© National Instruments Corp. 7 NI 9269E Operating Instructions and Specifications
Increasing Output Voltage Range
Each channel of the NI 9269E 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 you want to increase the nominal output voltage range, you can
cascade up to four output channels for a maximum of ±40 V
nominal. For example, if you want two channels with a nominal
output voltage range of ±20 V each, connect AO<0, 1> and
AO<2, 3> as shown in Figure 5. The output current of the cascaded
channels flows across two channels, limiting the total output
current to ±10 mA.

NI 9269E Operating Instructions and Specifications 8 ni.com
Figure 5. Increasing the Output Voltage Range of the NI 9269E
Cascading more than four output channels of multiple NI 9269E
modules violates the electrical safety and overvoltage protection
ratings.
Because the NI 9269E 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 9269E
AO<2, 3>+
AO<0, 1>–
AO<0, 1>+
AO0+
AO0–
AO1+
AO1–
AO2+
AO2–
AO3+
AO3–
Load
Load

© National Instruments Corp. 9 NI 9269E Operating Instructions and Specifications
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, you cannot
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.

NI 9269E Operating Instructions and Specifications 10 ni.com
Specifications
The following specifications are typical for the range –40 to 85 °C
internal to any enclosures 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.