National Instruments NI 9264 Manuale utente
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.
© National Instruments Corp. 3 NI 9264 Operating Instructions and Specifications
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
© National Instruments Corp. 5 NI 9264 Operating Instructions and Specifications
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.
© National Instruments Corp. 7 NI 9264 Operating Instructions and Specifications
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
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
COM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
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
AO
Load
NI 9264
© National Instruments Corp. 9 NI 9264 Operating Instructions and Specifications
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.
AO
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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