National Instruments 9221 User manual

GETTING STARTED GUIDE
NI 9221
8 AI, ±60 V, 12 Bit, 800 kS/s Aggregate

This document explains how to connect to the NI 9221. In this
document, the NI 9221 with screw terminal, NI 9221 with spring
terminal, and NI 9221 with DSUB are referred to inclusively as
the NI 9221.
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 9221. 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 9221 only as described in this document.
Caution Do not operate the NI 9221 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
2| ni.com | NI 9221 Getting Started Guide

way. If the product is damaged, return it to NI for
repair.
Hazardous Voltage This icon denotes a warning
advising you to take precautions to avoid electrical
shock.
NI 9221 with Screw Terminal and NI 9221 with
Spring Terminal Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-COM ±60 VDC maximum
Channel-to-channel None
Channel-to-earth ground
Continuous 250 Vrms, Measurement
Category II
Withstand 2,300 Vrms, verified by a 5 s
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
NI 9221 Getting Started Guide | © National Instruments | 3

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 9221 with screw
terminal or NI 9221 with spring terminal to signals or
use for measurements within Measurement Categories
III or IV.
NI 9221 with DSUB Safety Voltages
Connect only voltages that are within the following limits.
Channel-to-COM ±60 VDC maximum
Channel-to-channel None
Channel-to-earth
Continuous 60 VDC, Measurement
Category I
Withstand 1,000 Vrms, verified by a 5 s
dielectric withstand test
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
4| ni.com | NI 9221 Getting Started Guide

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 9221 with DSUB to
signals or use for measurements within Measurement
Categories 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.
Safety Guidelines for Hazardous Voltages
You can connect hazardous voltages only to the NI 9221 with
screw terminal and the NI 9221 with spring terminal. Do not
connect hazardous voltages to the NI 9221 with DSUB.
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.
NI 9221 Getting Started Guide | © National Instruments | 5

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 9927 connector backshell kit with the NI 9221
with screw terminal and the NI 9981 connector
backshell kit with the NI 9221 with spring terminal to
ensure that the terminals are not accessible.
Safety Guidelines for Hazardous Locations
The NI 9221 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
6| ni.com | NI 9221 Getting Started Guide

NI 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 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 Zone 2 applications, install a protection
device between the input signal and the NI 9221 input
terminal. The device must prevent the channel-to-COM
voltage from exceeding 85 V if there is a transient
overvoltage condition.
NI 9221 Getting Started Guide | © National Instruments | 7

Special Conditions for Hazardous Locations Use in
Europe and Internationally
The NI 9221 has been evaluated as Ex nA IIC T4 Gc equipment
under DEMKO Certificate No. 03 ATEX 0324020X and is
IECEx UL 14.0089X certified. Each NI 9221 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 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, 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.
8| ni.com | NI 9221 Getting Started Guide

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.
NI 9221 Getting Started Guide | © National Instruments | 9

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.
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.
10 | ni.com | NI 9221 Getting Started Guide

Preparing the Environment
Ensure that the environment in which you are using the NI 9221
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.
NI 9221 Getting Started Guide | © National Instruments | 11

NI 9221 Pinout
AI0
AI1
AI2
AI3
AI4
AI5
AI6
AI7
NC
COM
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
0
1
2
3
4
5
6
7
8
9
12 | ni.com | NI 9221 Getting Started Guide

Table 1. Signal Descriptions
Signal Description
AI Analog input signal connection
COM Common reference connection
NC No connection
Single-Ended Connections
COM
AI
+
–
Voltage
Source
NI 9221
NI 9221 Getting Started Guide | © National Instruments | 13

NI 9221 Connection Guidelines
• Make sure that devices you connect to the NI 9221 are
compatible with the module specifications.
• You must use 2-wire ferrules to create a secure connection
when connecting more than one wire to a single terminal on
the NI 9221 with screw terminal or NI 9221 with spring
terminal.
High-Vibration Application Connections
If your application is subject to high vibration, NI recommends
that you follow these guidelines to protect connections to the
NI 9221 with screw terminal or the NI 9221 with spring terminal:
• Use ferrules to terminate wires to the detachable connector.
• Use the NI 9927 backshell kit with the NI 9221 with screw
terminal or the NI 9981 backshell kit with the NI 9221 with
spring terminal.
Overvoltage Protection
The NI 9221 provides overvoltage protection for each channel.
14 | ni.com | NI 9221 Getting Started Guide

Note Refer to the device datasheet on ni.com/manuals
for more information about overvoltage protection.
NI 9221 Getting Started Guide | © National Instruments | 15

Where to Go Next
RELATED INFORMATION
C Series Documentation
& Resources
ni.com/info cseriesdoc
Services
ni.com/services
CompactRIO
Located at ni.com/manuals Installs with the software
NI CompactDAQ
NI 9221 Datasheet
NI-RIO Help
LabVIEW FPGA Help
NI 9221 Datasheet
NI-DAQmx Help
LabVIEW Help
16 | ni.com | NI 9221 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 9221 Getting Started Guide | © National Instruments | 17

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.
© 2016 National Instruments. All rights reserved.
375905A-01 Mar16