NI 9265E Bedienungsanleitung
OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9265E
4-Channel, 0–20 mA, 16-Bit Analog Current Output
Module
NI 9265E Operating Instructions and Specifications 2 ni.com
This document describes how to use the National Instruments 9265E
and includes dimensions, terminal assignments, and specifications for
the NI 9265E. 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 9265E. The end-product supplier is responsible
for conformity to any and all compliance requirements.
Caution The NI 9265E must be installed inside a suitable
enclosure prior to use. Hazardous voltages may be present.
© National Instruments Corp. 3 NI 9265E Operating Instructions and Specifications
NI 9265E Dimensions
The following figure shows the dimensions of the NI 9265E.
Figure 1. NI 9265E Dimensions in Millimeters (Inches)
73.4 (2.89)
0.0 (0.00)
26.7 (1.05)
58.4 (2.30)
66.0 (2.60)
0.0 (0.00)
NI 9265E Operating Instructions and Specifications 4 ni.com
Connecting the NI 9265E
The NI 9265E has a 10-terminal, detachable screw-terminal
connector that provides connections for 4 analog output channels.
Figure 2. NI 9265E Terminal Assignments
0
1
2
3
4
5
6
7
8
9
AO0
COM0
AO1
COM1
AO2
COM2
AO3
COM3
Vsup
Power Supply COM
© National Instruments Corp. 5 NI 9265E Operating Instructions and Specifications
The NI 9265E 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 NI 9265E also has a
terminal for an external power supply, Vsup, and an external power
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 9265E.
You can connect a load to each channel of the NI 9265E. 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 9265E.
NI 9265E Operating Instructions and Specifications 6 ni.com
Figure 3. Connecting a Load to the NI 9265E
You must connect an external power supply to the NI 9265E. This
power supply provides the current for the devices you connect to
the module. Connect the positive lead of the power supply to the
supply terminal, Vsup, and the negative lead of the power supply to
Power Supply COM.
AO
COM
NI 9265E
Isolated DAC
External
Power Supply
+
_
Vsup
Power
Supply
COM
Load
Protection
DC/DC
© National Instruments Corp. 7 NI 9265E Operating Instructions and Specifications
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 9265E.
When the module powers on, the channels output the startup
current. Refer to the Specifications section for more information
about startup current. 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.
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.
NI 9265E Operating Instructions and Specifications 8 ni.com
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.
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 COM unless otherwise noted.
Output Characteristics
Number of channels.......................... 4 analog output channels
DAC resolution ................................. 16 bits
Type of DAC ..................................... String
Power-on/Startup/
Power-down current.......................... 0.0 mA
Full-scale output current
Nominal ...................................... 20.0 mA
Minimum .................................... 20.1 mA
© National Instruments Corp. 9 NI 9265E Operating Instructions and Specifications
Typical ........................................ 20.6 mA
Maximum ................................... 21.0 mA
Output range ..................................... 0 to 20 mA
Compliance voltage .......................... 12 VDC max
Maximum load.................................. 600 Ω
Accuracy
Stability
Gain drift .................................... 30 ppm/°C
Offset drift .................................. 45 ppm/°C
Measurement Conditions
Percent of
Reading
(Gain Error)
Percent of
Range*
(Offset Error)
Calibrated, typ (25 °C, ±5 °C) 0.11% 0.19%
Calibrated, max (–40 to 85 °C) 0.25% 0.4%
Uncalibrated, typ (25 °C, ±5 °C) 0.35% 1.4%
Uncalibrated, max (–40 to 85 °C) 0.85% 2.5%
* Range equals 0 to 20.6 mA
NI 9265E Operating Instructions and Specifications 10 ni.com
External power supply
voltage range (Vsup) .......................... 9–36 VDC
Protection (AO, Vsup)
Overvoltage ................................ ±40 V
Short-circuit................................ Indefinitely
Update time
Noise................................................. 600 nArms
Crosstalk ........................................... –90 dB
Settling time (to 1 LSB)
Full-scale step............................. 10 μs
1 mA step ................................... 5 μs
Number of
Channels
Update Time for R Series
Expansion Chassis
Update Time for
Any Other Chassis
13.5 μs 3 μs
26.5 μs 5 μs
3 9 μs7.5 μs
412 μs9.5 μs
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