National Instruments NI 9381 User manual

GETTING STARTED GUIDE
NI 9381
8 AI/8 AO/4 DIO, 0 V to 5 V, 12 Bit, 20 kS/s
Aggregate

This document explains how to connect to the NI 9381.
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 9381. 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 9381 only as described in this document.
Caution Do not operate the NI 9381 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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Safety Voltages
Isolation
Channel-to-channel None
Channel-to-earth
ground
None
Safety Guidelines for Hazardous Locations
The NI 9381 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 9381 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.
NI 9381 Getting Started Guide | © National Instruments | 3

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.
Caution For Division 2 and Zone 2 applications,
connected low impedance sources must include a
protection device installed between the source and the
AI and DIO terminals. The protection device must
prevent the AI to ground voltage and DIO to ground
voltage from exceeding 42 V if there is a transient
overvoltage condition.
Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9381 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 12 ATEX 1202658X and is
IECEx UL 14.0089X certified. Each NI 9381 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 9381
in Gas Group IIC hazardous locations, you must use the device in
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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.
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
NI 9381 Getting Started Guide | © National Instruments | 5

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.
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
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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.
Preparing the Environment
Ensure that the environment in which you are using the NI 9381
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
NI 9381 Getting Started Guide | © National Instruments | 7

Indoor use only.
Note Refer to the device datasheet on ni.com/manuals
for complete specifications.
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NI 9381 Pinout
GND
AO2
AO3
GND
AO6
AO7
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
AO0
AO1
GND
AO4
AO5
GND
AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
DIO0
DIO1
DIO2
DIO3
GND
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
26
27
28
29
30
31
32
33
34
35
36
37
NI 9381 Getting Started Guide | © National Instruments | 9

Table 1. Signal Descriptions
Signal Description
AI Analog input signal connection
AO Analog output signal connection
DIO Digital input/output signal connection
GND Ground connection
Single-Ended Connections
GND
AI
+
–
Voltage
Source
NI 9381
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To ensure fast settling times, connect signal sources that have an
impedance smaller than 1 kΩ. Large source impedances increase
the settling time of the ADC, which decreases the accuracy at fast
scanning rates.
Analog Output Connections
NI 9381
GND
AO
Load
NI 9381 Getting Started Guide | © National Instruments | 11

Digital Input/Output Connections
LVTTL Signal
+2.7 V
+5 V
LED
DIO0 as Input
DIO1 as Input
GND
DIO2 as Output
NI 9381Device 3
Device 2
Device 1
DIO channel direction is software selectable. Changing the
direction on any channel does not affect the direction on the other
channels.
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Timing Guidelines
When using the AI, AO, and DIO channels on the NI 9381
concurrently, follow these guidelines to ensure high accuracy.
• Use a single I/O Node to access AI and AO operations to
ensure proper sequencing.
• Configure the line direction of the DIO channels before
performing operations on other channels or stop all
operations to change the line direction of a DIO channel.
Tip Refer to the NI CompactRIO Device Drivers Help
on ni.com/manuals for more information about NI 9381
timing.
NI 9381 Getting Started Guide | © National Instruments | 13

Where to Go Next
Located at ni.com/manuals Installs with the software
Hardware Software
RELATED INFORMATION
NI 9381 Datasheet CompactRIO Device
Drivers Help
LabVIEW FPGA Help
C Series Documentation
& Resources
ni.com/info cseriesdoc
Services
ni.com/services
14 | ni.com | NI 9381 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 9381 Getting Started Guide | © National Instruments | 15

NI corporate headquarters is located at
11500 North Mopac Expressway, Austin, Texas, 78759-3504. NI
also has offices located around the world. For telephone support
in the United States, create your service request at ni.com/support
or dial 1 866 ASK MYNI (275 6964). For telephone support
outside the United States, visit the Worldwide Offices section of
ni.com/niglobal to access the branch office websites, which
provide up-to-date contact information, support phone numbers,
email addresses, and current events.
Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for information on NI
trademarks. Other product and company names mentioned herein are trademarks or trade names
of their respective companies. For patents covering NI products/technology, refer to the
appropriate location: Help»Patents in your software, the patents.txt file on your media, or the
National Instruments Patent Notice at ni.com/patents. You can find information about end-user
license agreements (EULAs) and third-party legal notices in the readme file for your NI product.
Refer to the Export Compliance Information at ni.com/legal/export-compliance for the NI
global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/
export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF
THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS.
U.S. Government Customers: The data contained in this manual was developed at private
expense and is subject to the applicable limited rights and restricted data rights as set forth in FAR
52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.
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375983C-01 Mar16