National Instruments NI 9201, NI 9221 Specifications
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OPERATING INSTRUCTIONS AND SPECIFICATIONS
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NI 9201/9221
8-Channel, 12-Bit Analog Input Modules
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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
ni.com/info and enter cseriesdoc for information
about C Series documentation.
NI 9201/9221 2 ni.com
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Safety Guidelines
Operate the NI 9201/9221 only as described in these operating
instructions.
Hot Surface This icon denotes that the component may be
hot. Touching this component may result in bodily injury.
Safety Guidelines for Hazardous Voltages
Yo u can connect hazardous voltages only to the NI 9201/9221 with
screw terminal. Do not connect hazardous voltages to the
NI 9201/9221 with DSUB.
If hazardous voltages are connected to the module, take the
following precautions. A hazardous voltage is a voltage greater
than 42.4 V
© National Instruments Corp. 3 NI 9201/9221
or 60 VDC to earth ground.
pk
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.
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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
with the NI 9201/9221 with screw terminal.
NI 9201/9221 4 ni.com
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Figure 1. NI 9932 Connector Backshell
Safety Guidelines for Hazardous Locations
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.
© National Instruments Corp. 5 NI 9201/9221
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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
NI 9201/9221 6 ni.com
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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.
© National Instruments Corp. 7 NI 9201/9221
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Connecting the NI 9201/9221
The NI 9201/9221 provides connections for eight analog input
channels.
AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
NC
COM
0
1
2
3
4
5
6
7
8
9
AI0
NC
AI1
AI2
NC
AI3
AI4
NC
AI5
AI6
NC
AI7
1
14
15
16
17
18
19
20
21
22
23
24
25
COM
2
NC
3
COM
4
COM
5
NC
6
COM
7
COM
8
NC
9
COM
10
COM
11
NC
12
COM
13
COM
Figure 2. NI 9201/9221 Terminal and Pin Assignments
NI 9201/9221 8 ni.com
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