National Instruments NI 9201 User manual

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OPERATING INSTRUCTIONS AND SPECIFICATIONS
NI 9201/9221
8-Channel, 12-Bit Analog Input Modules
ni.com/manuals
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NI 9201/9221 2 ni.com
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 youneed for the modules youare using. For
information about installing, configuring, and programming the
system, refer to the system documentation. Visit ni.com/info
and enter cseriesdoc for information about C Series
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.
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© National Instruments Corp. 3 NI 9201/9221
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 ucan 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 Vpk 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.
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NI 9201/9221 4 ni.com
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 Vpk/60 VDC), youmust ensure that devices
and circuits connected to the module are properly
insulated from human contact. Youmust 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 ucan use the NI 9932 connector backshell only
with the NI 9201/9221 with screw terminal.
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© National Instruments Corp. 5 NI 9201/9221
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 youare
installing the NI 9201/9221 in a potentially explosive environment.
Not following these guidelines may result in serious injury or
death.
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NI 9201/9221 6 ni.com
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
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© National Instruments Corp. 7 NI 9201/9221
locations, in ambient temperatures of –40 °C ≤Ta ≤70 °C. If you
are using the NI 9201/9221 in Gas Group IIC hazardous locations,
youmust 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.
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NI 9201/9221 8 ni.com
Connecting the NI 9201/9221
The NI 9201/9221 provides connections for eight analog input
channels.
Figure 2. NI 9201/9221 Terminal and Pin Assignments
AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
NC
COM
0
1
2
3
4
5
6
7
8
9
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
AI0
NC
AI1
AI2
NC
AI3
AI4
NC
AI5
AI6
NC
AI7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
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© National Instruments Corp. 9 NI 9201/9221
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 youcan 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.
Figure 3. Input Circuitry on the NI 9201/9221
NI 9201/9221
Buffer Isolated
ADC
Overvoltage
Protection Mux
COM
AI7
AI0
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