National Instruments NI 9219 User manual

GETTING STARTED GUIDE
NI 9219
4 AI, 100 S/s/ch Simultaneous, Universal
Measurements

This document explains how to connect to the NI 9219.
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 9219. 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 9219 only as described in this document.
Caution Do not operate the NI 9219 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 NI 9972 connector backshell kit to ensure that the
terminals are not accessible.
NI 9219 Getting Started Guide | © National Instruments | 3

Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-channel
Continuous 250 VAC, Measurement
Category II
Withstand 1,390 VAC, verified by a 5 s
dielectric withstand test
Channel-to-earth ground
Continuous 250 VAC, Measurement
Category II
Withstand 2,300 VAC, verified by a 5 s
dielectric withstand test
Zone 2 hazardous locations applications in Europe
Channel-to-channel
and channel-to-earth
ground
60 VDC, Measurement
Category I
Measurement Category I is for measurements performed on
circuits not directly connected to the electrical distribution system
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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 9219 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.
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.
NI 9219 Getting Started Guide | © National Instruments | 5

Caution Do not connect the NI 9219 to signals or use
for measurements within Measurement Categories III
or IV.
Safety Guidelines for Hazardous Locations
The NI 9219 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 9219 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.
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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.
Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9219 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 9219 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 9219
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
NI 9219 Getting Started Guide | © National Instruments | 7

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.
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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
and cables to ensure that the desired EMC performance
is attained.
NI 9219 Getting Started Guide | © National Instruments | 9

Preparing the Environment
Ensure that the environment in which you are using the NI 9219
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.
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NI 9219 Pinout
CH0
CH1
CH2
CH3
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
NI 9219 Getting Started Guide | © National Instruments | 11

Table 1. Signals by Mode
Mode Pin
1 2 3 4 5 6
Voltage T+ T- — HI LO —
Current T+ T- HI — LO —
4-Wire Resistance T+ T- EX+ HI EX- LO
2-Wire Resistance T+ T- HI — LO —
Thermocouple T+ T- — HI LO —
4-Wire RTD T+ T- EX+ HI EX- LO
3-Wire RTD T+ T- EX+ — EX- LO
Quarter-Bridge T+ T- HI — LO —
Half-Bridge T+ T- EX+ HI EX- —
Full-Bridge T+ T- EX+ HI EX- LO
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Table 1. Signals by Mode (Continued)
Mode Pin
1 2 3 4 5 6
DI T+ T- — HI LO —
Open Contact T+ T- HI — LO —
Table 2. Signal Descriptions
Signal Description
EX+ Positive sensor excitation connection
EX- Negative sensor excitation connection
HI Positive input signal connection
LO Negative input signal connection
T+ TEDS data connection
T- TEDS COM connection
NI 9219 Getting Started Guide | © National Instruments | 13

Measurement Types
The NI 9219 provides modes for the following measurement
types.
• Voltage
• Current
• 4-Wire Resistance
• 2-Wire Resistance
• Thermocouple
• 4-Wire RTD
• 3-Wire RTD
• Quarter-Bridge
• Half-Bridge
• Full-Bridge
• Digital In1
• Open Contact1
1Only supported in CompactRIO systems.
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Voltage Connections
LO
HI
NI 9219
+
–
Related Information
Voltage Pinout on page 30
NI 9219 Getting Started Guide | © National Instruments | 15

Current Connections
LO
HI
NI 9219
Related Information
Current Pinout on page 30
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Thermocouple Connections
LO
HI
NI 9219
Thermocouple
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.
• 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.
NI 9219 Getting Started Guide | © National Instruments | 17

• Make sure the NI 9219 terminals are facing forward or
upward.
• Keep the NI 9219 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.
Related Information
Thermocouple Pinout on page 31
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4-Wire Resistance and 4-Wire RTD Connections
LO
HI
EX-
RTD/
Resistor
EX+
Rwire
Rwire
Rwire
Rwire
NI 9219
Related Information
4-Wire Resistance and 4-Wire RTD Pinout on page 31
NI 9219 Getting Started Guide | © National Instruments | 19

3-Wire RTD Connections
RTD
Rwire
Rwire
NI 9219
EX+
EX-
LO
Rwire
Related Information
3-Wire RTD Pinout on page 32
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