National Instruments 9232 Manuale utente
OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9232
3-Channel, ±30 V, 24-Bit Software Selectable
IEPE and AC/DC Analog Input Module
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2|ni.com |NI 9232 Operating Instructions and Specifications
This document describes how to use the National Instruments 9232
and includes specifications and terminal assignments for the
NI 9232. 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 9232. 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 9232 Operating Instructions and Specifications |© National Instruments |3
Safety Guidelines
Operate the NI 9232 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 9232 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 9232 is suitable for use in Class I, Division 2, Groups A, B,
C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4, and
Ex nA IIC T4 hazardous locations; and nonhazardous locations
only. Follow these guidelines if you are installing the NI 9232 in a
potentially explosive environment. Not following these guidelines
may result in serious injury or death.
4|ni.com |NI 9232 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 IEPE sensors must be within the following
limit:
Capacitance..........................0.08 μF max
Caution For Division 2 and Zone 2 applications,
connected low impedance sources must include a
protection device installed between the source and the
AI terminals. The protection device must prevent the AI+
to AI- voltage from exceeding 42 V if there is a transient
overvoltage condition.
NI 9232 Operating Instructions and Specifications |© National Instruments |5
Special Conditions for Hazardous Locations Use in
Europe
This equipment has been evaluated as Ex nA IIC T4 equipment
under DEMKO Certificate No. 07 ATEX 0626664X. Each module
is marked II 3G and is suitable for use in Zone 2 hazardous
locations, in ambient temperatures of -40 °C ≤Ta ≤70 °C. If you
are using the NI 9232 in Gas Group IIC hazardous locations, you
must use the device in an NI chassis that has been evaluated as
Ex nC IIC T4, 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
6|ni.com |NI 9232 Operating Instructions and Specifications
product is used in residential areas. To minimize the potential for
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 double-shielded, twisted
pair cables and shielded accessories.
Caution Electrostatic Discharge (ESD) can damage this
product. To prevent damage, use industry-standard ESD
prevention measures during installation, maintenance,
and operation.
Caution To ensure the specified EMC performance, you
must install clamp-on ferrite beads (National Instruments
part number 611461-01) in accordance with the product
installation instructions. Refer to the NI 9232 product
page on ni.com for purchasing information about
clamp-on ferrite beads.
NI 9232 Operating Instructions and Specifications |© National Instruments |7
Cable Requirements for EMC Compliance
Select and install cables for the NI 9232 in accordance with the
following requirements:
• Connect the cable shield to the chassis ground (grounding
screw of the chassis) as shown in Figure 1.
• Install a clamp-on ferrite bead (National Instruments part
number 611461-01) on the input cables for each channel that you
are connecting to on the NI 9232. Refer to Figure 1 for a diagram.
• Clamp-on ferrite beads must be installed on the cable as close
to the module as possible. Placing the ferrite elsewhere on the
cable noticeably impairs its effectiveness.
8|ni.com |NI 9232 Operating Instructions and Specifications
Figure 1. NI 9232 Cable Connections for EMC Compliance
NI 9232
Shield
AI0+
AI0–
Ferrite
Shield
AI1+
AI1–
Ferrite
Shield
AI2+
AI2–
Ferrite
Signal
Source
Signal
Source
Signal
Source
NI 9232 Operating Instructions and Specifications |© National Instruments |9
Special Guidelines for Marine Applications
Some products are Lloyd’s Register (LR) Type Approved for
marine (shipboard) applications. To verify Lloyd’s Register
certification for a product, visit ni.com/certification and
search for the LR certificate, or look for the Lloyd’s Register mark
on the product label.
Caution In order to meet the EMC requirements for
marine applications, install the product in a shielded
enclosure with shielded and/or filtered power and
input/output ports. In addition, take precautions when
designing, selecting, and installing measurement probes
and cables to ensure that the desired EMC performance is
attained.
10 |ni.com |NI 9232 Operating Instructions and Specifications
Connecting the NI 9232
The NI 9232 has three 2-terminal detachable screw-terminal
connectors that provide connections to three simultaneously
sampled analog input channels.
Figure 2. NI 9232 Terminal Assignments
AI0+
AI0–
AI1+
AI1–
AI2+
AI2–
0
1
0
1
0
1
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