National Instruments 9472 User manual
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OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9472/9474
8-Channel Digital Output Modules
ni.com/manuals
DeutschFrançais
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NI 9472/9474 2 ni.com
This document describes how to use the National Instruments 9472
and National Instruments 9474 and includes specifications and
terminal or pin assignments. In this document, the NI 9472/9474
with screw terminal and NI 9472 with DSUB are referred to
inclusively as the NI 9472/9474. 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 9472/9474. 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 9472/9474 only as described in these operating
instructions.
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© National Instruments Corp. 3 NI 9472/9474
Hot Surface This icon denotes that the component may be
hot. Touching this component may result in bodily injury.
Safety Guidelines for Hazardous Voltages
Yo ucan connect hazardous voltages only to the NI 9472/9474 with
screw terminal. Do not connect hazardous voltages to the NI 9472
with DSUB.
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 Vpk/60 VDC), youmust ensure that devices
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NI 9472/9474 4 ni.com
and circuits connected to the module are properly
insulated from human contact. Youmust use the NI 9932
connector backshell kit to ensure that the terminals are
not accessible.
Figure 1 shows the NI 9932 connector backshell.
Note Yo ucan use the NI 9932 connector backshell only
with the NI 9472/9474 with screw terminal.
Figure 1. NI 9932 Connector Backshell
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© National Instruments Corp. 5 NI 9472/9474
Safety Guidelines for Hazardous Locations
The NI 9472/9474 is suitable for use in Class I, Division 2,
Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2,
AEx nC IIC T4 and Ex nC IIC T4 hazardous locations; and
nonhazardous locations only. Follow these guidelines if youare
installing the NI 9472/9474 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.
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NI 9472/9474 6 ni.com
Caution For Zone 2 applications, install a protection
device between the Vsupand COM terminals on the
NI 9472/9474. The device must prevent the input
Vsup-to-COM voltage from exceeding 42 V if there is a
transient overvoltage condition.
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 youare using the NI 9472/9474 in Gas Group IIC
hazardous locations or in ambient temperatures of
–40 °C ≤Ta ≤70 °C, youmust 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.
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© National Instruments Corp. 7 NI 9472/9474
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.
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NI 9472/9474 8 ni.com
Connecting the NI 9472/9474
The NI 9472/9474 provides connections for eight digital output
channels.
Figure 2. NI 9472/9474 Terminal and Pin Assignments
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
Vsup
COM
0
1
2
3
4
5
6
7
8
9
COM
Vsup
COM
COM
Vsup
COM
COM
Vsup
COM
COM
Vsup
COM
COM
DO0
Vsup
DO1
DO2
Vsup
DO3
DO4
Vsup
DO5
DO6
Vsup
DO7
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
03
47
03
47
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© National Instruments Corp. 9 NI 9472/9474
The NI 9472/9474 with screw terminal has a 10-terminal,
detachable screw-terminal connector. The NI 9472 with DSUB has
a 25-pin DSUB connector. Each channel of the NI 9472/9474 has
a terminal or pin, DO, to which youcan connect a device. The
eight digital output channels are internally referenced to the
common terminal or pin, COM. National Instruments recommends
youprovide independent COM and Vsup wiring for each channel of
the NI 9472 with DSUB to minimize current flow in the COM and
Vsup wiring. The COM pins on the NI 9472 with DSUB are
internally connected..
Note Yo umust use 2-wire ferrules to create a secure
connection when connecting more than one wire to a
single terminal on the NI 9472/9474 with screw terminal.
Each channel has an LED that indicates the state of the channel.
When a channel LED is lit, the channel is on. When the LED is
dark, the channel is off. The LEDs are disabled when the chassis is
in sleep mode. Refer to the Sleep Mode section for more
information about sleep mode.
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