National Instruments NI 9214 User manual

NI-9214

GETTING STARTED GUIDE
NI 9214
16 TC, ±78 mV, 24 Bit, 68 S/s Aggregate,
Isothermal Terminal Block

This document explains how to connect to the NI 9214.
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 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.
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.
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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.
NI 9214 Getting Started Guide | © National Instruments | 3

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
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.
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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 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 IP54
as defined by IEC/EN 60079-15.
NI 9214 Getting Started Guide | © National Instruments | 5

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 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.
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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
NI 9214 Getting Started Guide | © National Instruments | 7

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 shielded cables and
accessories.
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
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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.
NI 9214 Getting Started Guide | © National Instruments | 9

TB-9214 Pinout
TC0+
TC2+
TC2-
TC3+
TC3-
TC4+
TC4-
TC7+
TC7-
TC8+
TC8-
TC9+
TC9-
TC10+
TC10-
TC11+
TC11-
TC11+
TC11-
TC13+
TC13-
TC14+
TC14-
TC15+
TC15-
TC0-
TC1+
TC1-
TC5+
TC5-
TC6+
TC6-
COM
COM
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Table 1. Signal Descriptions
Signal Description
COM Common reference connection
TC+ Positive thermocouple connection
TC- Negative thermocouple connection
NI 9214 Getting Started Guide | © National Instruments | 11

Thermocouple Connections
Thermocouple
TC-
COM
TC+
Shield
TB-9214 NI 9214
Ground
Lug
For most applications, you do not need to connect COM.
Connecting to COM is not necessary for the following
configurations:
• All thermocouples are floating
• All thermocouples are referenced to the same common-mode
voltage
• One thermocouple is reference to a common-mode voltage
and all other thermocouples are floating
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When COM is floating, the internal common-mode voltage of the
input circuitry is the average of all the inputs.
Note When two or more thermocouples are referenced
to different common-mode voltages, connect COM to a
common-mode voltage reference that is within ±1.2 V
of the common-mode voltages of all thermocouple
inputs.
NI 9214 Connection Guidelines
• Make sure that devices you connect to the NI 9214 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
NI 9214 Getting Started Guide | © National Instruments | 13

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 after 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.
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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
• Zip tie
• Screwdriver
NI 9214 Getting Started Guide | © National Instruments | 15

What to Do
1 2
34
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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.
2. Tighten the jackscrews to a maximum torque of 0.4 N · m
(3.6 lb · in.). Do not overtighten the jackscrews.
NI 9214 Getting Started Guide | © National Instruments | 17

Where to Go Next
Located at ni.com/manuals Installs with the software
CompactRIO NI CompactDAQ
RELATED INFORMATION
C Series Documentation
& Resources
ni.com/info cseriesdoc
Services
ni.com/services
NI 9214 Datasheet
NI-RIO Help
LabVIEW FPGA Help
NI 9214 Datasheet
NI-DAQmx Help
LabVIEW Help
18 | ni.com | NI 9214 Getting Started Guide

Worldwide Support and Services
The NI website is your complete resource for technical support.
At ni.com/support, you have access to everything from
troubleshooting and application development self-help resources
to email and phone assistance from NI Application Engineers.
Visit ni.com/services for NI Factory Installation Services, repairs,
extended warranty, and other services.
Visit ni.com/register to register your NI product. Product
registration facilitates technical support and ensures that you
receive important information updates from NI.
A Declaration of Conformity (DoC) is our claim of compliance
with the Council of the European Communities using the
manufacturer’s declaration of conformity. This system affords the
user protection for electromagnetic compatibility (EMC) and
product safety. You can obtain the DoC for your product by
visiting ni.com/certification. If your product supports calibration,
you can obtain the calibration certificate for your product at
ni.com/calibration.
NI 9214 Getting Started Guide | © National Instruments | 19