National Instruments NI 9401 Manual de usuario
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OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9401
8-Channel, TTL Digital Input/Output Module
ni.com/manuals
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2|ni.com |NI 9401 Operating Instructions and Specifications
This document describes how to use the National Instruments 9401
and includes specifications and terminal assignments for the
NI 9401. For information about installing, configuring, and
programming the system, refer to the system documentation. Visit
ni.com/info and enter the following Info Codes:
•cseriesdoc—for information about C Series and system
documentation.
•compatibility—for information about chassis and carrier
compatibility for the modules you are using.
•rdsoftwareversion—for information about which software
you need for the modules you are using.
Note The safety guidelines and specifications in this
document are specific to the NI 9401. 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 9401 Operating Instructions and Specifications |© National Instruments |3
Safety Guidelines
Operate the NI 9401 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.
Caution Do not operate the NI 9401 in a manner not
specified in these operating instructions. Product misuse
can result in a hazard. You can compromise the safety
protection built into the product if the product is damaged
in any way. If the product is damaged, return it to National
Instruments for repair.
Safety Guidelines for Hazardous Locations
The NI 9401 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 you are installing the NI 9401 in a
potentially explosive environment. Not following these guidelines
may result in serious injury or death.
4|ni.com |NI 9401 Operating Instructions and Specifications
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 Division 2 and 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 Division 2 and Zone 2 applications,
connected signals must be within the following limit:
Capacitance .......................... 0.2 μF max
NI 9401 Operating Instructions and Specifications |© National Instruments |5
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 9401 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.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory
requirements and limits for electromagnetic compatibility (EMC)
as stated in the product specifications. These requirements and
limits are designed to provide reasonable protection against
harmful interference when the product is operated in its intended
operational electromagnetic environment.
This product is intended for use in industrial locations. There is no
guarantee that harmful interference will not occur in a particular
installation, when the product is connected to a test object, or if the
product is used in residential areas. To minimize the potential for
6|ni.com |NI 9401 Operating Instructions and Specifications
the product to cause interference to radio and television reception
or to experience unacceptable performance degradation, install and
use this product in strict accordance with the instructions in the
product documentation.
Furthermore, any changes or modifications to the product not
expressly approved by National Instruments could void your
authority to operate it under your local regulatory rules.
Caution To ensure the specified EMC performance,
operate this product only with shielded cables and
accessories.
Caution To ensure the specified EMC performance, you
must install a clamp-on ferrite bead (National
Instruments part number 711627-01) in accordance with
the product installation instructions. Refer to the NI 9401
product page on ni.com for purchasing information
about clamp-on ferrite beads.
NI 9401 Operating Instructions and Specifications |© National Instruments |7
Cable Requirements for EMC Compliance
Select and install cables for the NI 9401 in accordance with the
following requirements:
• Install a clamp-on ferrite bead (National Instruments part
number 711627-01) on cable that you are connecting to NI 9401.
• The clamp-on ferrite bead must be connected to the cable as
close to the module as possible. Placing the ferrite elsewhere
on the cable noticeably impairs its effectiveness.
Figure 1. Installing a Ferrite Bead
1 Installing a ferrite bead on a 25-pin DSUB cable.
2 Installing a ferrite bead on the cable of the NI 9924 terminal block.
1 2
8|ni.com |NI 9401 Operating Instructions and Specifications
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 9401 Operating Instructions and Specifications |© National Instruments |9
Connecting the NI 9401
The NI 9401 has a 25-pin DSUB connector that provides
connections for eight digital input/output channels.
Figure 2. NI 9401 Pin Assignments
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
DIO0
NC
DIO1
DIO2
NC
DIO3
DIO4
NC
DIO5
DIO6
NC
DIO7
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
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