OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9265
4-Channel, 0–20 mA, 16-Bit Analog Current Output
Module
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This document describes how to use the National Instruments 9265
and includes specifications and terminal assignments for the
NI 9265. 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
and enter
cseriesdoc for information about C Series
ni.com/info
documentation.
Note The safety guidelines and specifications in this
document are specific to the NI 9265. 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.
Safety Guidelines
Operate the NI 9265 only as described in these operating
instructions.
NI 9265 Operating Instructions and Specifications 2 ni.com
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.
Caution When module terminals are hazardous voltage
LIVE (>42.4 V
/60 VDC), you must ensure that devices
pk
and circuits connected to the module are properly
insulated from human contact. You must use the NI 9932
connector backshell kit to ensure that the terminals are
not accessible.
© National Instruments Corp. 3 NI 9265 Operating Instructions and Specifications
Figure 1 shows the NI 9932 connector backshell.
Figure 1. NI 9932 Connector Backshell
Safety Guidelines for Hazardous Locations
The NI 9265 is suitable for use in Class I, Division 2, Groups A, B,
C, D, T 4 ha zar dous locations; Class I, 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 NI 9265 in a
potentially explosive environment. Not following these guidelines
may result in serious injury or death.
NI 9265 Operating Instructions and Specifications 4 ni.com
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 limits:
Capacitance .......................... 80 nF max
Inductance ............................ 0.2 H max
© National Instruments Corp. 5 NI 9265 Operating Instructions and Specifications
Special Conditions for Hazardous Locations 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. If you are using the NI 9265 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.
NI 9265 Operating Instructions and Specifications 6 ni.com
Connecting the NI 9265
The NI 9265 has a 10-terminal, detachable screw-terminal
connector that provides connections for 4 analog output channels.
AO0
COM0
AO1
COM1
AO2
COM2
AO3
COM3
Vsup
Power Supply COM
0
1
2
3
4
5
6
7
8
9
Figure 2. NI 9265 Terminal Assignments
© National Instruments Corp. 7 NI 9265 Operating Instructions and Specifications
The NI 9265 has four analog output channels, AO. Each channel
has a common terminal, COM, that is internally connected to the
isolated ground reference of the module. The 9265 also has a
terminal for an external power supply, V
, and an external power
sup
supply common terminal, Power Supply COM.
Each AO channel has a digital-to-analog converter (DAC) that
produces a current signal. 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 3 for an illustration of the output
circuitry for one channel of the NI 9265.
Yo u can connect a load to each channel of the NI 9265. Connect the
positive lead of the load to the AO terminal. Connect the ground of
the load to the corresponding COM terminal. Refer to Figure 3 for
an illustration of how to connect a load to the NI 9265.
NI 9265 Operating Instructions and Specifications 8 ni.com
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