This document describes how to use the National Instruments 9201
and National Instruments 9221 and includes specifications and
terminal assignments for the NI 9201/9221. In this document,
the NI 9201/9221 with screw terminal and NI 9201/9221 with
DSUB are referred to inclusively as the NI 9201/9221. Visit
ni.com/info and enter rdsoftwareversion to determine
which software you need for the modules you are using. For
information about installing, configuring, and programming the
system, refer to the system documentation. Visit
and enter
cseriesdoc for information about C Series
ni.com/info
documentation.
Note The safety guidelines and specifications in this
document are specific to the NI 9201/9221. The other
components in the system might not meet the same safety
ratings and specifications. Refer to the documentation for
each component in the system to determine the safety
ratings and specifications for the entire system. Visit
Caution Make sure that devices and circuits connected to
the module are properly insulated from human contact.
Caution When module terminals are hazardous voltage
LIVE (>42.4 V
/60 VDC), you must ensure that devices
pk
and circuits connected to the module are properly
insulated from human contact. You must use the NI 9932
connector backshell kit to ensure that the terminals are
not accessible.
Figure 1 shows the NI 9932 connector backshell.
Note Yo u can use the NI 9932 connector backshell only
The NI 9201/9221 is suitable for use in Class I, Division 2,
Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2,
AEx nC IIC T4, and Ex nC IIC T4 hazardous locations; and
nonhazardous locations only. Follow these guidelines if you are
installing the NI 9201/9221 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 Zone 2 applications, install the system
in an enclosure rated to at least IP 54 as defined by
IEC 60529 and EN 60529.
Caution For Zone 2 applications, install a protection
device between the input signal and the NI 9201/9221
input terminal. The device must prevent the
channel-to-COM voltage from exceeding 85 V if there is
a transient overvoltage condition.
Special Conditions for Hazardous Locations Use in Europe
This equipment has been evaluated as EEx nC IIC T4 equipment
under DEMKO Certificate No. 03 ATEX 0324020X. Each module 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 9201/9221 in Gas Group IIC hazardous locations,
you must use the device in an NI chassis that has been evaluated as
Ex nC IIC T4, EEx nC IIC T4, Ex nA IIC T4, or Ex nL IIC T4
equipment.
Special Conditions for Marine Applications
Some modules are Lloyd’s Register (LR) Type Approved for
marine applications. To verify Lloyd’s Register certification, visit
ni.com/certification and search for the LR certificate, or
look for the Lloyd’s Register mark on the module.
Caution To meet radio frequency emission requirements
for marine applications, use shielded cables and install
the system in a metal enclosure. Suppression ferrites
must be installed on power supply inputs near power
entries to modules and controllers. Power supply and
module cables must be separated on opposite sides of the
enclosure and must enter and exit through opposing
enclosure walls.
The NI 9201/9221 with screw terminal has a 10-terminal,
detachable screw-terminal connector. The NI 9201/9221 with
DSUB has a 25-pin DSUB connector. Each channel has an AI
terminal or pin to which you can connect a voltage signal. COM,
the common terminal or pin, is internally connected to the isolated
ground reference of the module.
The NI 9201/9221 channels are isolated from other modules in the
system. The module protects each channel from overvoltages.
Refer to the Specifications section for more information about
overvoltage protection. The input signals are scanned, buffered,
conditioned, and then sampled by a single 12-bit ADC. Refer to
Figure 3 for an illustration of the input circuitry on the
NI 9201/9221.
Yo u can connect single-ended voltage signals to the NI 9201/9221.
COM
AI
+
–
Voltage
Source
NI 9201/9221
Connect the positive lead of the voltage signal to AI. Connect the
ground signal to COM. Refer to Figure 3 for an illustration of
connecting a single-ended voltage signal to the NI 9201/9221.
Figure 4. Connecting a Single-Ended Voltage Signal to the NI 9201/9221
Note
Yo u must use 2-wire ferrules to create a secure
connection when connecting more than one wire to a
single terminal on the NI 9201/9221 with screw terminal.
If an application using the NI 9201/9221 with screw terminal is
subject to high vibration, National Instruments recommends that
you either use ferrules to terminate wires to the detachable
screw-terminal connector or use the NI 9932 backshell kit to
protect the connections. Refer to Figure 5 for an illustration of
using ferrules. Refer to Figure 1 for an illustration of the NI 9932
connector backshell.
Figure 5. 10-Terminal Detachable Screw-Terminal Connector with Ferrule
This module supports a low-power sleep mode. Support for sleep
mode at the system level depends on the chassis that the module is
plugged into. Refer to the chassis manual for information about
support for sleep mode. If the chassis supports sleep mode, refer to
the software help for information about enabling sleep mode. Visit
ni.com/info and enter cseriesdoc for information about
C Series documentation.
Typically, when a system is in sleep mode, you cannot
communicate with the modules. In sleep mode, the system
consumes minimal power and may dissipate less heat than it does
in normal mode. Refer to the Specifications section for more
information about power consumption and thermal dissipation.
The following specifications are typical for the range –40 to 70 °C
unless otherwise noted. All voltages are relative to COM unless
otherwise noted. The specifications are the same for the NI 9201
and the NI 9221 unless otherwise noted.
Input Characteristics
Number of channels.......................... 8 analog inputchannels
Continuous ................................. 250 V
rms
,
Measurement Category II
Withstand....................................2,300 V
, verified by a 5 s
rms
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 9201/9221 with screw
terminal to signals or use for measurements within
Measurement Categories III or IV.
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 Do not connect the NI 9201/9221 with DSUB to
signals or use for measurements within Measurement
Categories II, III, or IV.
Hazardous Locations
U.S. (UL) .......................................... Class I, Division 2,
Canada (C-UL) ................................. Class I, Division 2,
Europe (DEMKO)............................. EEx nC IIC T4
Refer to the product Declaration of Conformity (DoC) for
additional regulatory compliance information. To obtain product
certifications and the DoC for this product, visit ni.com/
certification
click the appropriate link in the Certification column.
To meet these specifications, you must panel mount the system. If
you are using the NI 9201/9221 with screw terminal, you also must
either affix ferrules to the ends of the terminal wires or use the
NI 9932 backshell kit to protect the connections.
Operating vibration
Random (IEC 60068-2-64)......... 5 g
, 10 to 500 Hz
rms
Sinusoidal (IEC 60068-2-6) .......5 g, 10 to 500 Hz
Operating shock
(IEC 60068-2-27).............................. 30 g, 11 ms half sine,
50 g, 3 ms half sine,
18 shocks at 6 orientations
Environmental
National Instruments C Series modules are intended for indoor use
only but may be used outdoors if installed in a suitable enclosure.
Refer to the manual for the chassis you are using for more
information about meeting these specifications.
(IEC 60068-2-56).............................. 10 to 90% RH,
noncondensing
Storage humidity
(IEC 60068-2-56).............................. 5 to 95% RH,
noncondensing
Maximum altitude............................. 2,000 m
Pollution Degree ...............................2
Environmental Management
National Instruments is committed to designing and manufacturing
products in an environmentally responsible manner. NI recognizes
that eliminating certain hazardous substances from our products is
beneficial to the environment and to NI customers.
For additional environmental information, refer to the NI and the Environment Web page at
contains the environmental regulations and directives with which
NI complies, as well as other environmental information not
included in this document.
Yo u can obtain the calibration certificate and information about
calibration services for the NI 9201/9221 at
calibration
.
ni.com/
Calibration interval ...........................1 year
Where to Go for Support
The National Instruments Web site is your complete resource for
technical support. At
everything from troubleshooting and application development
self-help resources to email and phone assistance from
NI Application Engineers.
National Instruments corporate headquarters is located at
11500 North Mopac Expressway, Austin, Texas, 78759-3504.
National Instruments also has offices located around the world to
help address your support needs. For telephone support in the
United States, create your service request at
and follow the calling instructions or dial 512 795 8248. For
telephone support outside the United States, contact your local
branch office:
Australia 1800 300 800, Austria 43 662 457990-0,
Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,
Canada 800 433 3488, China 86 21 5050 9800,
Czech Republic 420 224 235 774, Denmark 45 45 76 26 00,
Finland 358 (0) 9 725 72511, France 01 57 66 24 24,
Germany 49 89 7413130, India 91 80 41190000,
Israel 972 3 6393737, Italy 39 02 41309277, Japan 0120-527196,
Korea 82 02 3451 3400, Lebanon 961 (0) 1 33 28 28,
Malaysia 1800 887710, Mexico 01 800 010 0793,
Netherlands 31 (0) 348 433 466, New Zealand 0800 553 322,
Norway 47 (0) 66 90 76 60, Poland 48 22 328 90 10,
Portugal 351 210 311 210, Russia 7 495 783 6851,
Singapore 1800 226 5886, Slovenia 386 3 425 42 00,
South Africa 27 0 11 805 8197, Spain 34 91 640 0085,
Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151,
Taiwan 886 02 2377 2222, Thailand 662 278 6777,
Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545
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