National Instruments NI 9212 Manual de usuario
NI-9212
2023-06-07
Contents
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Guidelines for Hazardous Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Isolation Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Guidelines for Hazardous Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Special Conditions for Hazardous Locations Use in Europe and Internationally.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electromagnetic Compatibility Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Special Conditions for Marine Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Preparing the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TB-9212 Pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
NI 9212 Connection Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Minimizing Thermal Gradients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
NI 9212 and TB-9212 with Screw Terminal Thermocouple Connection. . . . . . . . . . . . 11
NI 9212 and TB-9212 with Mini TC Thermocouple Connection. . . . . . . . . . . . . . . . . . . 11
Installing the TB-9212 with Screw Terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wiring the TB-9212 with screw terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installing the TB-9212 with Mini TC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting the TB-9212 with mini TC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Where to Go Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Worldwide Support and Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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Overview
This document explains how to connect to the NI 9212 using the TB-9212. In this
document, TB-9212 with screw terminal and TB-9212 with mini TC are inclusively
referred to as TB-9212.
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 9212. 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.
© 2015–2016National 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 9212 only as described in this document.
Caution Do not operate the NI 9212 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-9212
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-9212 included with the NI 9212 to ensure that the terminals are not
accessible.
Note The TB-9212 with screw terminal contains a plastic insert to prevent
accidental wire contact with the metal enclosure.
Isolation Voltages
NI 9212 and TB-9212 with Screw Terminal Isolation Voltages
Connect only voltages that are within the following limits:
Channel-to-channel isolation
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Up to 2,000 m altitude
Continuous 250 Vrms, Measurement Category II
Withstand 1,500 Vrms, verified by a 5 s dielectric test
Up to 5,000 m altitude
Continuous 60 VDC, Measurement Category I
Withstand 1,000 Vrms, verified by a 5 s dielectric test
Channel-to-earth ground isolation
Up to 2,000 m altitude
Continuous 250 Vrms, Measurement Category II
Withstand 3,000 Vrms, verified by a 5 s dielectric test
Up to 5,000 m altitude
Continuous 60 VDC, Measurement Category I
Withstand 1,000 Vrms, verified by a 5 s dielectric 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.
Caution If using in Division 2 or Zone 2 hazardous locations
applications, do not connect the NI 9212 and TB-9212 with screw terminal
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.
© National Instruments 5
NI-9212
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 9212 and TB-9212 with screw terminal to
signals or use for measurements within Measurement Categories III or IV.
NI 9212 and TB-9212 with Mini TC Isolation Voltages
Connect only voltages that are within the following limits:
Channel-to-channel isolation, Up to 5,000 m altitude
Continuous 60 VDC, Measurement Category I
Withstand 1,000 Vrms
Channel-to-earth ground isolation, Up to 5,000 m altitude
Continuous 60 VDC, Measurement Category I
Withstand 1,000 Vrms
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.
Caution If using in Division 2 or Zone 2 hazardous locations
applications, do not connect the NI 9212 and TB-9212 with mini TC 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
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NI-9212
MAINS building installations of Measurement Categories CAT II, CAT III, or
CAT IV.
Safety Guidelines for Hazardous Locations
The NI 9212 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 9212 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.
Capacitance 0.2 µF maximum
Special Conditions for Hazardous Locations Use in Europe and
Internationally
The NI 9212 has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO 12
ATEX 1202658X and is IECEx UL 14.0089X certified. Each NI 9212 is marked II 3G
and is suitable for use in Zone 2 hazardous locations, in ambient temperatures of
© National Instruments 7
NI-9212
-40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9212 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/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
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.
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NI-9212
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 9212 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 5,000 m
Indoor use only.
Note Refer to the device datasheet on ni.com/manuals for complete
specifications.
TB-9212 Pinout
© National Instruments 9
NI-9212
Table 1. Signal Descriptions
Signal Description
TC Thermocouple connection
TC+ Positive thermocouple connection
TC- Negative thermocouple connection
NI 9212 Connection Guidelines
■Make sure that devices you connect to the NI 9212 are compatible with the
module specifications.
■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-9212 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 9212 terminals are facing forward or upward.
■Keep the NI 9212 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
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NI-9212
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