National Instruments NI-9232 Manual de usuario
GETTING STARTED GUIDE
NI 9232
3 AI, ±30 V, 24 Bit, 102.4 kS/s/ch Simultaneous
This document explains how to connect to the NI 9232. In this
document, the NI 9232 with screw terminal and the NI 9232 with
BNC are referred to inclusively as the NI 9232.
Note Before you begin, complete the software and
hardware installation procedures in your chassis
documentation.
Note The guidelines in this document are specific to
the NI 9232. The other components in the system might
not meet the same safety ratings. Refer to the
documentation for each component in the system to
determine the safety and EMC ratings for the entire
system.
Safety Guidelines
Operate the NI 9232 only as described in this document.
Caution Do not operate the NI 9232 in a manner not
specified in this document. Product misuse can result in
a hazard. You can compromise the safety protection
built into the product if the product is damaged in any
2| ni.com | NI 9232 Getting Started Guide
way. If the product is damaged, return it to NI for
repair.
Safety Voltages
Connect only voltages that are within the following limits.
Isolation
Channel-to-channel None
Channel-to-earth ground
Continuous 60 VDC, Measurement
Category I
Withstand 1,000 Vrms, verified by a 5 s
dielectric withstand test
Measurement Category I is for measurements performed on
circuits not directly connected to the electrical distribution system
referred to as MAINS voltage. MAINS is a hazardous live
electrical supply system that powers equipment. This category is
for measurements of voltages from specially protected secondary
circuits. Such voltage measurements include signal levels, special
equipment, limited-energy parts of equipment, circuits powered
by regulated low-voltage sources, and electronics.
NI 9232 Getting Started Guide | © National Instruments | 3
Caution Do not connect the NI 9232 to signals or use
for measurements within Measurement Categories II,
III, or IV.
Note Measurement Categories CAT I and CAT O are
equivalent. These test and measurement circuits are not
intended for direct connection to the MAINS building
installations of Measurement Categories CAT II,
CAT III, or CAT IV.
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.
Caution Do not disconnect I/O-side wires or
connectors unless power has been switched off or the
area is known to be nonhazardous.
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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 IP54
as defined by IEC/EN 60079-15.
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.
Caution For Division 2 and Zone 2 applications,
connected signals must be within the following limits.
Capacitance 0.08 μF max
NI 9232 Getting Started Guide | © National Instruments | 5
Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9232 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 12 ATEX 1202658X and is
IECEx UL 14.0089X certified. Each NI 9232 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, Ex IIC
T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.
Caution You must make sure that transient
disturbances do not exceed 140% of the rated voltage.
Caution The system shall only be used in an area of
not more than Pollution Degree 2, as defined in
IEC 60664-1.
Caution The system shall be mounted in an
ATEX/IECEx-certified enclosure with a minimum
ingress protection rating of at least IP54 as defined in
IEC/EN 60079-15.
6| ni.com | NI 9232 Getting Started Guide
Caution The enclosure must have a door or cover
accessible only by the use of a tool.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory
requirements and limits for electromagnetic compatibility (EMC)
stated in the product specifications. These requirements and
limits provide reasonable protection against harmful interference
when the product is operated in the intended operational
electromagnetic environment.
This product is intended for use in industrial locations. However,
harmful interference may occur in some installations, when the
product is connected to a peripheral device or test object, or if the
product is used in residential or commercial areas. To minimize
interference with radio and television reception and prevent
unacceptable performance degradation, install and use this
product in strict accordance with the instructions in the product
documentation.
NI 9232 Getting Started Guide | © National Instruments | 7
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. Do not use unshielded cables or
accessories unless they are installed in a shielded
enclosure with properly designed and shielded input/
output ports and connected to the product using a
shielded cable. If unshielded cables or accessories are
not properly installed and shielded, the EMC
specifications for the product are no longer guaranteed.
Caution Electrostatic Discharge (ESD) can damage
the NI 9232. To prevent damage, use industry-standard
ESD prevention measures during installation,
maintenance, and operation.
Caution To ensure the specified EMC performance
for the NI 9232 with screw terminal, you must install
clamp-on ferrite beads (part number 782802-01) in
accordance with the product installation instructions.
8| ni.com | NI 9232 Getting Started Guide
Refer to the NI 9232 product page on ni.com for
purchasing information about clamp-on ferrite beads.
Caution To ensure the specified EMC performance,
the length of all I/O cables must be no longer than 30 m
(100 ft).
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).
• For the NI 9232 with screw terminal, install a clamp-on
ferrite bead (part number 782802-01) on the input cable for
each channel that you are connecting to on the NI 9232.
• For the NI 9232 with screw terminal, 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.
NI 9232 Getting Started Guide | © National Instruments | 9
Figure 1. Cable Connections for EMC Compliance
NI 9232
with Screw Terminal
Shield AI0+
AI0-
Shield AI1+
AI1-
Shield AI2+
AI2-
Ferrite
Signal
Source
Signal
Source
Signal
Source
Ferrite Ferrite
Special Conditions 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.
10 | ni.com | NI 9232 Getting Started Guide
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