National Instruments NI 9214 Manuale utente
NI-9214
2023-04-25
Contents
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Guidelines for Hazardous Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Guidelines for Hazardous Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Special Conditions for Marine Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Preparing the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
TB-9214 Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermocouple Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
NI 9214 Connection Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Minimizing Thermal Gradients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Wiring the TB-9214. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installing the TB-9214. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Where to Go Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Worldwide Support and Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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NI-9214
Overview
This document explains how to connect to the NI 9214.
Note Before you begin, complete the soware and hardware installation
procedures in your chassis documentation.
Note The guidelines in this document are specific to the NI 9214. 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.
© 2010–2016National Instruments Corporation. All rights reserved. Refer to the
<National Instruments>\_Legal Information directory for information about NI
copyright, patents, trademarks, warranties, product warnings, and export
compliance.
Safety Guidelines
Operate the NI 9214 only as described in this document.
Caution Do not operate the NI 9214 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.
© National Instruments 3
NI-9214
Hazardous Voltage This icon denotes a warning advising you to take
precautions to avoid electrical shock.
Safety Guidelines for Hazardous Voltages
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.
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
TB-9214 included with the NI 9214 to ensure that the terminals are not
accessible.
Safety Voltages
Connect only voltages that are within the following limits:
Between any two terminals ±30 V maximum
Isolation
Channel-to-channel None
Channel-to-earth ground
Continuous 250 Vrms, Measurement Category II
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NI-9214
Withstand 2,300 Vrms, verified by a 5 s dielectric withstand
test
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 9214 to signals or use for measurements
within Measurement Categories III or IV.
Safety Guidelines for Hazardous Locations
The NI 9214 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 9214 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 o or the area is known to be nonhazardous.
Caution Do not remove modules unless power has been switched o 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.
© National Instruments 5
NI-9214
Capacitance 0.2 µF maximum
Special Conditions for Hazardous Locations Use in Europe and
Internationally
The NI 9214 has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO
Certificate No. 07 ATEX 0626664X and is IECEx UL 14.0089X certified. Each NI 9214 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 9214 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.
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
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NI-9214
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.
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.
Preparing the Environment
Ensure that the environment in which you are using the NI 9214 meets the following
specifications.
Operating temperature
(IEC 60068-2-1, IEC 60068-2-2)
-40 °C to 70 °C
Operating humidity (IEC 60068-2-78) 10% RH to 90% RH, noncondensing
Pollution Degree 2
Maximum altitude 2,000 m
Indoor use only.
Note Refer to the device datasheet on ni.com/manuals for complete
specifications.
© National Instruments 7
NI-9214
TB-9214 Pinout
TC0+
TC2+
TC2-
TC3+
TC3-
TC4+
TC4-
TC7+
TC7-
TC8+
TC8-
TC9+
TC9-
TC10+
TC10-
TC11+
TC11-
TC12+
TC12-
TC13+
TC13-
TC14+
TC14-
TC15+
TC15-
TC0-
TC1+
TC1-
TC5+
TC5-
TC6+
TC6-
COM
COM
Table 1. Signal Descriptions
Signal Description
COM Common reference connection
TC+ Positive thermocouple connection
TC- Negative thermocouple connection
Thermocouple Connections
Thermocouple
TC-
COM
TC+
Shield
TB-9214 NI 9214
Ground
Lug
NI 9214 Connection Guidelines
■Make sure that devices you connect to the NI 9214 are compatible with the
module specifications.
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NI-9214
■The shield grounding methodology can vary depending on the application.
■Refer to your thermocouple documentation or the thermocouple wire spool
to determine which wire is the positive lead and which wire is the negative
lead.
Minimizing Thermal Gradients
Changes in the ambient air temperature near the front connector or a thermocouple
wire conducting heat directly to terminal junctions can cause thermal gradients.
Observe the following guidelines to minimize thermal gradients and improve the
system accuracy.
■Use small-gauge thermocouple wire. Smaller wire transfers less heat to or
from the terminal junction.
■Run thermocouple wiring together near the TB-9214 to keep the wires at the
same temperature.
■Avoid running thermocouple wires near hot or cold objects.
■Minimize adjacent heat sources and air flow across the terminals.
■Keep the ambient temperature as stable as possible.
■Make sure the NI 9214 terminals are facing forward or upward.
■Keep the NI 9214 in a stable and consistent orientation.
■Allow the thermal gradients to settle aer a change in system power or in
ambient temperature. A change in system power can happen when the
system powers on, the system comes out of sleep mode, or you insert/remove
modules.
■If possible, use the foam pad in the TB-9214 opening to restrict airflow
around the terminals.
Wiring the TB-9214
What to Use
■TB-9214
■0.05 mm2 to 0.5 mm2 (30 AWG to 20 AWG) wire with 5.1 mm (0.2 in.) of the
inner insulation stripped and 51 mm (2.0 in.) of the outer insulation stripped
© National Instruments 9
NI-9214
■Zip tie
■Screwdriver
What to Do
1 2
34
1. Loosen the captive screws on the TB-9214 and remove the top cover and foam
pad.
2. Insert the stripped end of the wire fully into the appropriate terminal and
tighten the screw for the terminal. Make sure no exposed wire extends past
the screw terminal.
3. Route the wire through the TB-9214 opening, remove slack from the wiring,
and secure the wires using a zip tie.
4. Replace the foam pad in the TB-9214 opening, reinstall the top cover, and
tighten the captive screws.
Installing the TB-9214
What to Do
1. Connect the TB-9214 to the NI 9214 front connector.
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