OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9476
32-Channel, 24 V, Sourcing Digital Output Module
DeutschFrançais
ni.com/manuals
This document describes how to use the National Instruments 9476
and includes specifications and pin assignments for the NI 9476.
Vis it 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 9476. 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.
NI 9476 Operating Instructions and Specifications 2 ni.com
Safety Guidelines
Operate the NI 9476 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 Locations
The NI 9476 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 9476 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.
© National Instruments Corp. 3 NI 9476 Operating Instructions and Specifications
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, install a protection
device between the external power supply and the V
pin. The device must prevent the V
-to-COM voltage
sup
sup
from exceeding 50 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 you are using the NI 9476 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.
NI 9476 Operating Instructions and Specifications 4 ni.com
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. 5 NI 9476 Operating Instructions and Specifications
Connecting the NI 9476
The NI 9476 has a 37-pin DSUB connector that provides
connections for 32 digital output channels.
1
DO16
20
DO17
21
DO18
22
DO19
23
DO20
24
DO21
25
DO22
26
DO23
27
Vsup
28
29
Vsup
30
DO24
31
DO25
32
DO26
33
DO27
34
DO28
35
DO29
36
DO30
37
DO31
Figure 1. NI 9476 Pin Assignments
NI 9476 Operating Instructions and Specifications 6 ni.com
DO0
2
DO1
3
DO2
4
DO3
5
DO4
6
DO5
7
DO6
8
DO7
9
Vsup
10
Vsup
11
DO8
12
DO9
13
DO10
14
DO11
15
DO12
16
DO13
17
DO14
18
DO15
19
COM
Each channel has a DO pin to which you can connect a digital input
device. The 32 digital output channels are internally referenced to
COM.
Yo u must connect an external power supply to the NI 9476. The
power supply provides the current for the output channels. Connect
the positive lead of the power supply to the supply pin, V
sup
, and
the negative lead of the power supply to the common pin, COM.
Refer to the Specifications section for information about the power
supply voltage range.
Note The V
pins are internally connected. You can
sup
connect only one external voltage supply to the device.
Caution Do not remove or insert modules if the external
power supply connected to the V
and COM pins is
sup
powered on.
The NI 9476 has current sourcing outputs, meaning the DO pin is
driven to V
© National Instruments Corp. 7 NI 9476 Operating Instructions and Specifications
when the channel is turned on.
sup
Yo u can directly connect the NI 9476 to a variety of industrial
V
devices such as solenoids, motors, actuators, relays, and lamps.
Make sure the devices you connect to the NI 9476 are compatible
with the output specifications of the module. Refer to the
Specifications section for more information about the output
specifications.
Connect the device to DO and COM, and connect the external
power supply to V
NI 9476
NI 9476 Operating Instructions and Specifications 8 ni.com
and COM, as shown in Figure 2.
sup
sup
DO
Device
COM
Figure 2. Connecting a Device to the NI 9476
+
_
External
Powe r
Supply
Loading...