National Instruments 9220 Manuale utente
GETTING STARTED GUIDE
NI 9220
16 AI, ±10 V, 16 Bit, 100 kS/s/ch Simultaneous
This document explains how to connect to the NI 9220. In this
document, the NI 9220 with spring terminal and the NI 9220 with
DSUB are referred to inclusively as the NI 9220.
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 9220. 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.
Caution Electrostatic Discharge (ESD) can damage
the NI 9220 with spring terminal. To prevent damage,
use industry-standard ESD prevention measures during
installation, maintenance, and operation.
Safety Guidelines
Operate the NI 9220 only as described in this document.
2| ni.com | NI 9220 Getting Started Guide
Caution Do not operate the NI 9220 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
way. If the product is damaged, return it to NI for
repair.
Hazardous Voltage This icon denotes a warning
advising you to take precautions to avoid electrical
shock with the NI 9220 with spring terminal.
Safety Voltages
Connect only voltages that are within the following limits:
NI 9220 with Spring Terminal Isolation Voltages
Channel-to-channel None
Channel-to-earth ground
Continuous 250 Vrms,
Measurement Category II
Withstand up to
4,000 m
3,000 Vrms, verified by a 5 s
dielectric withstand test
NI 9220 Getting Started Guide | © National Instruments | 3
Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
This category refers to local-level electrical distribution, such as
that provided by a standard wall outlet, for example, 115 V for
U.S. or 230 V for Europe.
Caution Do not connect the NI 9220 with spring
terminal to signals or use for measurements within
Measurement Categories III or IV.
NI 9220 with DSUB Safety Voltages
Channel-to-COM ±30 V maximum
Isolation
Channel-to-COM None
Channel-to-earth ground
Continuous 60 VDC, Measurement
Category I
Withstand up to
2,000 m
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
4| ni.com | NI 9220 Getting Started Guide
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.
Caution Do not connect the NI 9220 with DSUB to
signals or use for measurements within Measurement
Categories II, III, or IV.
Safety Guidelines for Hazardous Voltages
You can connect hazardous voltages only to the
NI 9220 with spring terminal. Do not connect hazardous voltages
to the NI 9220 with DSUB.
If hazardous voltages are connected to the device, take the
following precautions. A hazardous voltage is a voltage greater
than 42.4 Vpk voltage or 60 VDC to earth ground.
Caution Ensure that hazardous voltage wiring is
performed only by qualified personnel adhering to local
electrical standards.
NI 9220 Getting Started Guide | © National Instruments | 5
Caution Do not mix hazardous voltage circuits and
human-accessible circuits on the same module.
Caution Ensure 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), you must ensure
that devices and circuits connected to the module are
properly insulated from human contact. You must use
the NI 9940 connector backshell kit to ensure that the
terminals are not accessible.
Safety Guidelines for Hazardous Locations
The NI 9220 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 9220 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.
6| ni.com | NI 9220 Getting Started Guide
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 signals must be within the following limits.
Capacitance 0.2 µF maximum
Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9220 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO 12 ATEX 1202658X and is IECEx UL 14.0089X
certified. Each NI 9220 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 9220 in Gas Group IIC
hazardous locations, you must use the device in an NI chassis that
NI 9220 Getting Started Guide | © National Instruments | 7
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/EN 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.
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
8| ni.com | NI 9220 Getting Started Guide
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.
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 of
the NI 9220 with DSUB, the length of all I/O cables
must be no longer than 30 m (100 ft).
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/
NI 9220 Getting Started Guide | © National Instruments | 9
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.
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.
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 9220 Getting Started Guide
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