Omron NXR Series User manual

Environment-resistive Remote Terminal
NXR-series
IO-Link I/O Hub
IO-Link I/O Hub
User’s Manual
W620-E1-02
NXR-ID166C-IL2
NXR-CD166C-IL2

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in
any form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior
written permission of OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because
OMRON is constantly striving to improve its high-quality products, the information contained in this manual is
subject to change without notice. Every precaution has been taken in the preparation of this manual. Neverthe-
less, OMRON assumes no responsibility for errors or omissions. Neither is any liability assumed for damages
resulting from the use of the information contained in this publication.
• Sysmac and SYSMAC are trademarks or registered trademarks of OMRON Corporation in Japan and other
countries for OMRON factory automation products.
• Microsoft, Windows, Windows Vista, Excel, and Visual Basic are either registered trademarks or trademarks of
Microsoft Corporation in the United States and other countries.
• EtherCAT®is registered trademark and patented technology, licensed by Beckhoff Automation GmbH, Germany.
• Safety over EtherCAT®is registered trademark and patented technology, licensed by Beckhoff Automation GmbH,
Germany.
• ODVA, CIP, CompoNet, DeviceNet, and EtherNet/IP are trademarks of ODVA.
• The SD and SDHC logos are trademarks of SD-3C, LLC.
Other company names and product names in this document are the trademarks or registered trademarks of their
respective companies.
Trademarks
Copyrights
NOTE
Microsoft product screen shots reprinted with permission from Microsoft Corporation.

Introduction
Thank you for purchasing an NXR-series IO-Link I/O Hub.
This manual contains information that is necessary to use the NXR-series IO-Link I/O Hub. Please
read this manual and make sure you understand the functionality and performance of the NXR-series
IO-Link I/O Hub before you attempt to build an IO-Link System.
Keep this manual in a safe place where it will be available for reference during operation.
Intended Audience
This manual is intended for the following personnel, who must also have knowledge of electrical sys-
tems (an electrical engineer or the equivalent).
• Personnel in charge of introducing FA systems.
• Personnel in charge of designing FA systems.
• Personnel in charge of installing and maintaining FA systems.
• Personnel in charge of managing FA systems and facilities.
For programming, this manual is intended for personnel who understand the programming language
specifications in international standard IEC 61131-3 or Japanese standard JIS B 3503.
Applicable Products
This manual covers the following products.
• NXR-series IO-Link I/O Hub
NXR-ID166C-IL2
NXR-CD166C-IL2
Introduction
1
NXR-series IO-Link I/O Hub User’s Manual (W620)

Manual Structure
Page Structure
The following page structure is used in this manual.
4-9
4 Installation and Wiring
NJ-series CPU Unit Hardware User’s Manual (W500)
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4-3 Mounting Units
The Units that make up an NJ-series Controller can be connected simply by pressing the Units together
and locking the sliders by moving them toward the back of the Units. The End Cover is connected in the
same way to the Unit on the far right side of the Controller.
1Join the Units so that the connectors fit exactly.
2The yellow sliders at the top and bottom of each Unit lock the Units together. Move the sliders
toward the back of the Units as shown below until they click into place.
Precautions for Correct UsePrecautions for Correct Use
4-3-1 Connecting Controller Components
Connector
Hook Hook holes
Slider
Lock
Release
Move the sliders toward the back
until they lock into place.
Level 1 heading
Level 2 heading
Level 3 heading
Level 2 heading
A step in a procedure
Manual name
Special information
Level 3 heading
Page tab
Gives the current
headings.
Indicates a procedure.
Icons indicate
precautions, additional
information, or reference
information.
Gives the number
of the main section.
The sliders on the tops and bottoms of the Power Supply Unit, CPU Unit, I/O Units, Special I/O
Units, and CPU Bus Units must be completely locked (until they click into place) after connecting
the adjacent Unit connectors.
Note This illustration is provided only as a sample. It may not literally appear in this manual.
Manual Structure
2NXR-series IO-Link I/O Hub User’s Manual (W620)

Special Information
Special information in this manual is classified as follows:
Precautions for Safe Use
Precautions on what to do and what not to do to ensure safe usage of the product.
Precautions for Correct Use
Precautions on what to do and what not to do to ensure proper operation and performance.
Additional Information
Additional information to read as required.
This information is provided to increase understanding or make operation easier.
Version Information
Information on differences in specifications and functionality for IO-Link Master Units and CX-Configu-
ratorFDT with different unit versions is given.
Precaution on Terminology
• In this manual, "Store to device" refers to transferring data from the Support Software to a physical
device and "Load from device" refers to transferring data from a physical device to the Support Soft-
ware.
• In this manual, the directions in relation to the IO-Link I/O Hubs are given in the following figure,
which shows upright installation.
Up
Right
Left
Down
Manual Structure
3
NXR-series IO-Link I/O Hub User’s Manual (W620)

Manual Structure
4NXR-series IO-Link I/O Hub User’s Manual (W620)

Sections in this Manual
1
2
3
4
5
6
7
8
9
1A
6
5
4
7
8
9
I
Installation and Wiring
Process Data and
Service Data
Functions of IO-Link
I/O Hubs
Troubleshooting
Appendices
A
Index
I
2I
3
Designing the Power
Supply System
Part Names and
Functions
Inspection and
Maintenance
Features and System
Configuration
Specifications and
Application Procedures
Sections in this Manual
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NXR-series IO-Link I/O Hub User’s Manual (W620)

CONTENTS
Introduction .............................................................................................................. 1
Intended Audience...........................................................................................................................................1
Applicable Products .........................................................................................................................................1
Manual Structure...................................................................................................... 2
Page Structure.................................................................................................................................................2
Special Information ..........................................................................................................................................3
Precaution on Terminology ..............................................................................................................................3
Sections in this Manual ........................................................................................... 5
Terms and Conditions Agreement.......................................................................... 9
Warranty, Limitations of Liability ......................................................................................................................9
Application Considerations ............................................................................................................................10
Disclaimers ....................................................................................................................................................10
Safety Precautions................................................................................................. 12
Definition of Precautionary Information..........................................................................................................12
Symbols .........................................................................................................................................................12
Warnings........................................................................................................................................................13
Precautions for Safe Use ...................................................................................... 14
Precautions for Correct Use ................................................................................. 17
Regulations and Standards .................................................................................. 18
Conformance to EU Directives ......................................................................................................................18
Conformance to UL and CSA Standards.......................................................................................................19
Conformance to Shipbuilding Standards .......................................................................................................19
Conformance to KC Certification ...................................................................................................................19
Software Licenses and Copyrights ................................................................................................................19
Unit Versions .......................................................................................................... 20
Unit Versions..................................................................................................................................................20
Unit Versions and Support Software Versions ...............................................................................................20
Related Manuals..................................................................................................... 21
Terminology............................................................................................................ 22
Revision History..................................................................................................... 23
Section 1 Features and System Configuration
1-1 Types and Features of IO-Link I/O Hubs..............................................................................1-2
1-1-1 Types...........................................................................................................................................1-3
1-1-2 Features ......................................................................................................................................1-3
1-2 System Configuration............................................................................................................1-5
1-3 List of Functions ....................................................................................................................1-7
CONTENTS
6NXR-series IO-Link I/O Hub User’s Manual (W620)

Section 2 Specifications and Application Procedures
2-1 Specifications.........................................................................................................................2-2
2-1-1 General Specifications ................................................................................................................2-2
2-1-2 Individual Specifications..............................................................................................................2-2
2-2 Dimensions.............................................................................................................................2-7
2-3 Application Procedures.........................................................................................................2-8
Section 3 Part Names and Functions
3-1 Parts and Names....................................................................................................................3-2
3-2 Indicators................................................................................................................................3-4
3-2-1 Status Indicators .........................................................................................................................3-4
3-2-2 I/O Indicators...............................................................................................................................3-5
3-3 Connectors .............................................................................................................................3-7
3-3-1 IO-Link Connector .......................................................................................................................3-7
3-3-2 I/O Connectors ............................................................................................................................3-7
Section 4 Designing the Power Supply System
4-1 Power Supply Types and Power Supply System ................................................................4-2
4-1-1 Power Supply Types and Applications ........................................................................................4-2
4-1-2 Power Supply System .................................................................................................................4-2
4-2 Designing the Power Supply System...................................................................................4-4
4-2-1 Procedure for Designing the Power Supply System ...................................................................4-4
4-2-2 Design Conditions for the Power Supply System........................................................................4-4
4-2-3 Calculating the Total Current Consumption.................................................................................4-5
4-2-4 Calculating the Voltage Drop.......................................................................................................4-7
4-3 Selecting the External Power Supply and Protective Devices ........................................4-10
Section 5 Installation and Wiring
5-1 Installing Hubs .......................................................................................................................5-2
5-1-1 Installation Precautions ...............................................................................................................5-2
5-1-2 Installation Orientations...............................................................................................................5-2
5-1-3 Installation Method ......................................................................................................................5-2
5-2 Wiring IO-Link Cable and I/O Cables....................................................................................5-4
5-2-1 Installation Precautions ...............................................................................................................5-4
5-2-2 Preparing for Wiring ....................................................................................................................5-4
5-2-3 Connecting IO-Link Cable ...........................................................................................................5-5
5-2-4 Connecting I/O Cables ................................................................................................................5-7
5-2-5 Tightening Torque......................................................................................................................5-10
5-2-6 Waterproof Covers ....................................................................................................................5-10
5-3 Wiring Example for I/O Connectors ................................................................................... 5-11
5-4 Connected Devices..............................................................................................................5-16
5-4-1 IO-Link Connector Cable...........................................................................................................5-16
5-4-2 I/O Cables .................................................................................................................................5-16
5-4-3 Waterproof Cover for Connectors .............................................................................................5-17
Section 6 Process Data and Service Data
6-1 Process Data ..........................................................................................................................6-2
CONTENTS
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NXR-series IO-Link I/O Hub User’s Manual (W620)

6-1-1 Digital Input Hub..........................................................................................................................6-2
6-1-2 Digital I/O Variable Hub ...............................................................................................................6-4
6-2 Service Data ...........................................................................................................................6-9
6-2-1 Digital I/O Hub.............................................................................................................................6-9
Section 7 Functions of IO-Link I/O Hubs
7-1 Functions of Digital I/O Hubs................................................................................................7-2
7-1-1 I/O Function.................................................................................................................................7-2
7-1-2 I/O Cable Disconnection Detection .............................................................................................7-3
7-1-3 I/O Cable Short-circuit Detection.................................................................................................7-6
7-1-4 All Hold Bits Reset ......................................................................................................................7-8
7-1-5 Voltage Drop Detection for Unit/Input Power Supply ..................................................................7-9
7-1-6 Voltage Drop Detection for Output Power Supply .....................................................................7-11
7-1-7 Digital Input Filter ......................................................................................................................7-12
7-1-8 Communications Error Output Setting ......................................................................................7-14
7-1-9 Monitoring Total Power-ON Time ..............................................................................................7-15
Section 8 Troubleshooting
8-1 Error Notification Methods....................................................................................................8-2
8-2 Checking for Errors ...............................................................................................................8-4
8-3 Checking for Errors and Troubleshooting with the Indicators..........................................8-6
8-3-1 Status Indicators .........................................................................................................................8-6
8-3-2 I/O Indicators...............................................................................................................................8-7
8-4 Checking for Errors and Troubleshooting with the Device Events...................................8-9
8-4-1 Device Events .............................................................................................................................8-9
8-4-2 Reading and Clearing Device Events .........................................................................................8-9
8-4-3 List of Device Events and Troubleshooting ...............................................................................8-11
8-5 Resetting Errors...................................................................................................................8-12
Section 9 Inspection and Maintenance
9-1 Cleaning and Inspection .......................................................................................................9-2
9-1-1 Cleaning ......................................................................................................................................9-2
9-1-2 Inspection Procedure ..................................................................................................................9-2
9-2 Maintenance Procedure ........................................................................................................9-4
9-2-1 Handling an IO-Link I/O Hub to Replace.....................................................................................9-4
9-2-2 Replacing an IO-Link I/O Hub .....................................................................................................9-4
Appendices
A-1 Version Information .............................................................................................................. A-2
A-2 Considerations for Connecting a Two-wire DC Sensor .................................................... A-3
A-3 Wiring Precautions for External Output Signal Lines ....................................................... A-5
A-4 Configuration Tab Page........................................................................................................ A-6
Index
CONTENTS
8NXR-series IO-Link I/O Hub User’s Manual (W620)

Terms and Conditions Agreement
Warranty, Limitations of Liability
Warranties
Exclusive Warranty
Omron’s exclusive warranty is that the Products will be free from defects in materials and work-
manship for a period of twelve months from the date of sale by Omron (or such other period ex-
pressed in writing by Omron). Omron disclaims all other warranties, express or implied.
Limitations
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF
THE PRODUCTS. BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based
on infringement by the Products or otherwise of any intellectual property right.
Buyer Remedy
Omron’s sole obligation hereunder shall be, at Omron’s election, to (i) replace (in the form originally
shipped with Buyer responsible for labor charges for removal or replacement thereof) the non-com-
plying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount equal
to the purchase price of the non-complying Product; provided that in no event shall Omron be re-
sponsible for warranty, repair, indemnity or any other claims or expenses regarding the Products
unless Omron’s analysis confirms that the Products were properly handled, stored, installed and
maintained and not subject to contamination, abuse, misuse or inappropriate modification. Return
of any Products by Buyer must be approved in writing by Omron before shipment. Omron Compa-
nies shall not be liable for the suitability or unsuitability or the results from the use of Products in
combination with any electrical or electronic components, circuits, system assemblies or any other
materials or substances or environments. Any advice, recommendations or information given orally
or in writing, are not to be construed as an amendment or addition to the above warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CON-
SEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY
Terms and Conditions Agreement
9
NXR-series IO-Link I/O Hub User’s Manual (W620)

WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED IN CONTRACT,
WARRANTY
, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on
which liability is asserted.
Application Considerations
Suitability of Use
Omron Companies shall not be responsible for conformity with any standards, codes or regulations
which apply to the combination of the Product in the Buyer’s application or use of the Product. At Buy-
er’s request, Omron will provide applicable third party certification documents identifying ratings and
limitations of use which apply to the Product. This information by itself is not sufficient for a complete
determination of the suitability of the Product in combination with the end product, machine, system, or
other application or use. Buyer shall be solely responsible for determining appropriateness of the par-
ticular Product with respect to Buyer’s application, product or system. Buyer shall take application re-
sponsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY OR IN LARGE QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE
HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT(S) IS
PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIP-
MENT OR SYSTEM.
Programmable Products
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or
any consequence thereof.
Disclaimers
Performance Data
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for
the user in determining suitability and does not constitute a warranty. It may represent the result of
Omron’s test conditions, and the user must correlate it to actual application requirements. Actual per-
formance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications
Product specifications and accessories may be changed at any time based on improvements and oth-
er reasons. It is our practice to change part numbers when published ratings or features are changed,
or when significant construction changes are made. However, some specifications of the Product may
Terms and Conditions Agreement
10 NXR-series IO-Link I/O Hub User’s Manual (W620)

be changed without any notice. When in doubt, special part numbers may be assigned to fix or estab-
lish key specifications for your application. Please consult with your Omron’s representative at any
time to confirm actual specifications of purchased Product.
Errors and Omissions
Information presented by Omron Companies has been checked and is believed to be accurate; how-
ever, no responsibility is assumed for clerical, typographical or proofreading errors or omissions.
Terms and Conditions Agreement
11
NXR-series IO-Link I/O Hub User’s Manual (W620)

Safety Precautions
Definition of Precautionary Information
The following notation is used in this manual to provide precautions required to ensure safe usage of
the NXR-series IO-Link I/O Hub.
The safety precautions that are provided are extremely important to safety. Always read and heed the
information provided in all safety precautions.
The following notation is used.
WARNING
Caution
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. Additionally, there may be
severe property damage.
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury, or property damage.
Symbols
The circle and slash symbol indicates operations that you must not do.
The specific operation is shown in the circle and explained in text.
This example indicates prohibiting disassembly.
The triangle symbol indicates precautions (including warnings).
The specific operation is shown in the triangle and explained in text.
This example indicates a precaution for electric shock.
The triangle symbol indicates precautions (including warnings).
The specific operation is shown in the triangle and explained in text.
This example indicates a general precaution.
The filled circle symbol indicates operations that you must do.
The specific operation is shown in the circle and explained in text.
This example shows a general precaution for something that you must do.
Safety Precautions
12 NXR-series IO-Link I/O Hub User’s Manual (W620)

Warnings
WARNING
During Power Supply
Do not touch the terminal section while power is ON.
Electric shock may occur.
Do not attempt to take any Unit apart.
In particular, high-voltage parts are present in Units that supply power while power is
supplied or immediately after power is turned OFF. Touching any of these parts may re-
sult in electric shock. There are sharp parts inside the Unit that may cause injury.
Fail-safe Measures
Provide safety measures in external circuits to ensure safety in the system if an abnor-
mality occurs due to malfunction of the CPU Unit, other Units, or slaves or due to other
external factors affecting operation.
Not doing so may result in serious accidents due to incorrect operation.
Emergency stop circuits, interlock circuits, limit circuits, and similar safety measures
must be provided in external control circuits.
The outputs may remain ON or OFF due to deposition or burning of the output relays or
destruction of the output transistors. As a countermeasure for such problems, external
safety measures must be provided to ensure safe operation of the system.
The CPU Unit will turn OFF all outputs from Basic Output Units in the following cases.
The remote I/O slaves will operate according to the settings in the slaves.
• If a power supply error occurs.
• If the power supply connection becomes faulty.
• If a CPU watchdog timer error or CPU reset occurs.
• If a Controller error in the major fault level occurs.
• While the CPU Unit is on standby until RUN mode is entered after the power is turned
ON
External safety measures must be provided to ensure safe operation of the system in
such cases.
You must take fail-safe measures to ensure safety in the event of incorrect, missing, or
abnormal signals caused by broken signal lines, momentary power interruptions, or oth-
er causes.
Not doing so may result in serious accidents due to incorrect operation.
Voltage and Current Inputs
Make sure that the voltages and currents that are input to the Hubs are within the speci-
fied ranges.
Inputting voltages or currents that are outside of the specified ranges may cause acci-
dents or fire.
Safety Precautions
13
NXR-series IO-Link I/O Hub User’s Manual (W620)

Precautions for Safe Use
Transporting
• When transporting any Unit, use the special packing box for it. Also, do not subject the Unit to ex-
cessive vibration or shock during transportation.
• Do not drop any Unit or subject it to abnormal vibration or shock.
Doing so may result in Unit failure or malfunction.
Installation
• Make sure that all Unit mounting screws are tightened to the torque specified in this manuals.
• Be sure that the communications cables and other items with locking devices are properly locked
into place.
• Before touching a Unit, be sure to first touch a grounded metallic object in order to discharge any
static build-up.
Wiring
• Make sure that all cable connector screws and waterproof cover screws are tightened to the torque
specified in this manual.
• If the Unit is used in more than one system, be sure to keep a clearance of at least 5 mm between
cables to prevent unstable operation due to interference. Do not bundle the cables together.
• Observe the following precautions when wiring the communications cable.
Keep the communications cables away from power lines and high-voltage lines.
• Use cables, connectors, and waterproof covers that are specified in this manual.
• Use the recommended communications cables that are specified in this manual.
• Double-check all wiring to make sure that it is correct before turning ON the power supply.
• Use the correct wiring parts and tools when you wire the system.
• Do not pull on the cables or bend the cables beyond their natural limit.
• Do not place heavy objects or step on top of the cables.
Power Supply Design
• Use the power supply voltage that is specified in this manual.
Setting an IO-Link I/O Hub
• When you connect an external device, check the port settings for pin 4 and pin 2.
Precautions for Safe Use
14 NXR-series IO-Link I/O Hub User’s Manual (W620)

IO-Link Communications
• Make sure that the communications distance and method of connection for IO-Link are within speci-
fications.
• Do not exceed the specifications of the connected IO-Link Master Units.
•IO-Link communications are not always established immediately after the power supply is turned
ON. Confirm that the Input Data Enabled for the I/O data in the IO-Link Master Unit is TRUE before
you use the IO-Link process input data. Refer to the NXR-series IO-Link Master Unit for EtherNet/IP
User’s Manual (Cat. No. W619) for details on the specifications of Input Data Enabled.
Actual Operation
• Check the user program, data, and parameter settings for proper execution before you use them for
actual operation.
• Take appropriate measures to ensure that the specified power with the rated voltage and frequency
is supplied in places where the power supply is unstable.
Turning OFF the Power Supply
• Always turn OFF the external power supply to the IO-Link I/O Hubs and the power to the devices to
communicate with the Hubs before you connect the communications cables.
• Always turn OFF the external power supply to the IO-Link I/O Hubs before attempting any of the fol-
lowing.
Assembling Units including the connected devices
Connecting or wiring cables
Attaching or removing connectors
Operation
• Confirm that the controlled system will not be adversely affected before you perform any of the fol-
lowing operations.
Changing the operating mode of the CPU Unit (including changing the setting of the Operating
Mode at Startup)
Changing the user program or settings
Changing set values or present values
Forced refreshing
• The CPU Unit refreshes I/O even when the program is stopped (i.e., even in PROGRAM mode).
Confirm safety thoroughly in advance before changing the status of any part of memory allocated to
I/O Units, Special I/O Units, or CPU Bus Units. Any changes to the data allocated to any Unit specif-
ically the Special I/O Units/CPU Bus Units may result in unexpected operation of the loads connect-
ed to the Unit.
Transferring I/O memory data to the CPU Unit with a Programming Device (PC tool).
Changing present values in memory with a Programming Device.
Force-setting/-resetting bits with a Programming Device.
Transferring I/O memory files from a memory card or EM file memory to the CPU Unit.
Transferring I/O memory from a host computer or from another PLC on a network.
Precautions for Safe Use
15
NXR-series IO-Link I/O Hub User’s Manual (W620)

Maintenance
• Do not use paint thinner when cleaning. Use commercially available alcohol.
• Do not use high-pressure cleaning.
Disposal
• Dispose of the product according to local ordinances as they apply.
Precautions for Safe Use
16 NXR-series IO-Link I/O Hub User’s Manual (W620)

Precautions for Correct Use
Storage, Mounting, and Wiring
• Do not operate or store the Units in the following locations. Doing so may result in malfunction or in
operation stopping.
Locations subject to direct sunlight
Locations subject to temperatures or humidity outside the range specified in the specifications
Locations subject to condensation as the result of severe changes in temperature
Locations subject to corrosive or flammable gases
Locations subject to dust (especially iron dust) or salts
Locations subject to exposure to acid, oil, or chemicals
Locations subject to shock or vibration
Locations close to power lines
• Take appropriate and sufficient countermeasures during installation in the following locations.
Locations subject to static electricity or other forms of noise
Locations subject to strong electromagnetic fields
Locations subject to possible exposure to radioactivity
Locations close to power supply lines
• Wire all connections correctly according to instructions in this manual.
• Do not use the Unit continuously submerged in water.
IO-Link Communications
• Do not disconnect the IO-Link communications cables during operation. The outputs will become
unstable.
Precautions for Correct Use
17
NXR-series IO-Link I/O Hub User’s Manual (W620)

Regulations and Standards
Conformance to EU Directives
Applicable Directives
• EMC Directives
• Low Voltage Directive
Concepts
EMC Directives
OMRON devices that comply with EU Directives also conform to the related EMC standards so that
they can be more easily built into other devices or the overall machine. The actual products have
been checked for conformity to EMC standards.*1
Whether the products conform to the standards in the system used by the customer, however, must
be checked by the customer. EMC-related performance of the OMRON devices that comply with
EU Directives will vary depending on the configuration, wiring, and other conditions of the equip-
ment or control panel on which the OMRON devices are installed. The customer must, therefore,
perform the final check to confirm that devices and the overall machine conform to EMC standards.
*1. Applicable EMC (Electromagnetic Compatibility) standards are as follows: EMS (Electromagnetic Suscept-
ibility): EN 61131-2, EMI (Electromagnetic Interference): EN 61131-2 (Radiated emission: 10-m regula-
tions).
Low Voltage Directive
Always ensure that devices operating at voltages of 50 to 1,000 VAC and 75 to 1,500 VDC meet
the required safety standards. The applicable directive is EN 61010-2-201.
Conformance to EU Directives
The NXR-series products comply with EU Directives. To ensure that the machine or device in which
the NXR-series products are used complies with EU Directives, the following precautions must be
observed.
• You must use SELV power supply for the DC power supplies that are connected as the Unit/input
power supplies and output power supplies for the NXR-series products.
We recommend that you use the OMRON S8VK-S-series Power Supplies. EMC standard com-
pliance was confirmed for the recommended Power Supplies.
• NXR-series products that comply with EU Directives also conform to the Common Emission
Standard. Radiated emission characteristics (10-m regulations) may vary depending on the con-
figuration of the control panel used, other devices connected to the control panel, wiring, and oth-
er conditions.
You must therefore confirm that the overall machine or equipment in which the NXR-series prod-
ucts are used complies with EU Directives.
• You must use power supplies with an output hold time of 10 ms or longer for the DC power sup-
plies that are connected as the Unit/input power supplies and output power supplies for the NXR-
series products.
Regulations and Standards
18 NXR-series IO-Link I/O Hub User’s Manual (W620)