Omron NX Series User manual

Machine Automation Controller
NX-series
CPU Unit
Hardware
User’s Manual
NX701-1£££
NX-PA9001/PD7001
CPU Unit
Power Supply Unit
W535-E1-14

NOTE
1. 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.
2. 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 infor-
mation contained in this manual is subject to change without notice.
3. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON as-
sumes no responsibility for errors or omissions.
Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.
Trademarks
•Sysmac and SYSMAC are trademarks or registered trademarks of OMRON Corporation in Japan
and other countries for OMRON factory automation products.
•Microsoft, Windows, Excel, Visual Basic, and Microsoft Edge 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.
•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 trade-
marks of their respective companies.
Copyrights
•Microsoft product screen shots used with permission from Microsoft.
•This product incorporates certain third party software. The license and copyright information associ-
ated with this software is available at http://www.fa.omron.co.jp/nj_info_e/.

Introduction
Thank you for purchasing an NX-series NX701 CPU Unit.
This manual contains information that is necessary to use the NX-series NX701 CPU Unit. Please
read this manual and make sure you understand the functionality and performance of the NX-series
CPU Unit before you attempt to use it in a control system.
In this manual, an NX-series NX701 CPU Unit is called an NX Series or NX-series CPU Unit.
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.
• NX-series CPU Units
NX701-17££
NX701-16££
Part of the specifications and restrictions for the CPU Units are given in other manuals. Refer to Rele-
vant Manuals on page 2 and Related Manuals on page 37.
Introduction
1
NX-series CPU Unit Hardware User’s Manual (W535)

Relevant Manuals
The following table provides the relevant manuals for the NX-series CPU Units. Read all of the man-
uals that are relevant to your system configuration and application before you use the NX-series CPU
Unit.
Most operations are performed from the Sysmac Studio Automation Software. Refer to the Sysmac
Studio Version 1 Operation Manual (Cat. No. W504) for information on the Sysmac Studio.
Manual
Basic information
Purpose of use
NX-series CPU Unit Hardware User’s Manual NJ/NX-series CPU Unit Software User’s Manual NJ/NX-series Instructions Reference Manual NJ/NX-series CPU Unit Motion Control User’s Manual NJ/NX-series Motion Control Instructions Reference Manual NJ/NX-series CPU Unit Built-in EtherCAT Port User’s Manual
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual NJ/NX-series CPU Unit OPC UA User’s Manual NX-series CPU Unit FINS Function User’s Manual NJ/NX-series Database Connection CPU Units User’s Manual NJ/NX-series Troubleshooting Manual
Introduction to NX-series Controllers ¡
Setting devices and hardware
¡
Using motion control ¡
Using EtherCAT ¡
Using EtherNet/IP ¡
Software settings
¡
Using motion control ¡
Using EtherCAT ¡
Using EtherNet/IP ¡
Using OPC UA ¡
Using FINS ¡
Using the database connection service ¡
Writing the user program
¡ ¡
Using motion control ¡ ¡
Using EtherCAT ¡
Using EtherNet/IP ¡
Using OPC UA ¡
Using FINS ¡
Using the database connection service ¡
Programming error processing ¡
Testing operation and debugging
¡
Using motion control ¡
Using EtherCAT ¡
Using EtherNet/IP ¡
Using OPC UA ¡
Using FINS ¡
Using the database connection service ¡
Relevant Manuals
2NX-series CPU Unit Hardware User’s Manual (W535)

Manual
Basic information
Purpose of use
NX-series CPU Unit Hardware User’s Manual NJ/NX-series CPU Unit Software User’s Manual NJ/NX-series Instructions Reference Manual NJ/NX-series CPU Unit Motion Control User’s Manual NJ/NX-series Motion Control Instructions Reference Manual NJ/NX-series CPU Unit Built-in EtherCAT Port User’s Manual NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual NJ/NX-series CPU Unit OPC UA User’s Manual NX-series CPU Unit FINS Function User’s Manual NJ/NX-series Database Connection CPU Units User’s Manual NJ/NX-series Troubleshooting Manual
Learning about error management and correc-
tions*1 r r r ¡
Maintenance
¡
Using motion control ¡
Using EtherCAT ¡
Using EtherNet/IP ¡
*1. Refer to the NJ/NX-series Troubleshooting Manual (Cat. No. W503) for the error management concepts and the error items. However,
refer to the manuals that are indicated with triangles (r) for details on errors corresponding to the products with the manuals that are
indicated with triangles (r).
Relevant Manuals
3
NX-series CPU Unit Hardware User’s Manual (W535)

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)
s
t
i
n
U
gnitn
u
oM
3-4
4
s
t
ne
no
p
m
o
C
rel
l
o
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t
n
oC
g
n
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1
-
3-
4
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.
This illustration is provided only as a sample. It may not literally appear in this manual.
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.
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.
Manual Structure
4NX-series CPU Unit Hardware User’s Manual (W535)

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 Controller with different unit versions
and for different versions of the Sysmac Studio is given.
Precaution on Terminology
In this manual, "download" refers to transferring data from the Sysmac Studio to the physical Control-
ler and "upload" refers to transferring data from the physical Controller to the Sysmac Studio.
For the Sysmac Studio, "synchronization" is used to both "upload" and "download" data. Here,
"synchronize" means to automatically compare the data for the Sysmac Studio on the computer with
the data in the physical Controller and transfer the data in the direction that is specified by the user.
Manual Structure
5
NX-series CPU Unit Hardware User’s Manual (W535)

Manual Structure
6NX-series CPU Unit Hardware User’s Manual (W535)

Sections in this Manual
Sections in this Manual
7
NX-series CPU Unit Hardware User’s Manual (W535)
1
2
3
4
5
1
2
3
4
5
I
Introduction to NX-series Controllers
System Configuration
Configuration Units
Installation and Wiring
Troubleshooting
I
6
A
Index
6
A
Inspection and Maintenance
Appendices

CONTENTS
Introduction .............................................................................................................. 1
Intended Audience...........................................................................................................................................1
Applicable Products .........................................................................................................................................1
Relevant Manuals..................................................................................................... 2
Manual Structure...................................................................................................... 4
Page Structure.................................................................................................................................................4
Special Information ..........................................................................................................................................4
Precaution on Terminology ..............................................................................................................................5
Sections in this Manual ........................................................................................... 7
Terms and Conditions Agreement........................................................................ 11
Warranty, Limitations of Liability .................................................................................................................... 11
Application Considerations ............................................................................................................................12
Disclaimers ....................................................................................................................................................12
Statement of security responsibilities for assumed use cases and against threats.......................................13
Safety Precautions................................................................................................. 14
Definition of Precautionary Information..........................................................................................................14
Symbols .........................................................................................................................................................14
Warnings........................................................................................................................................................14
Cautions.........................................................................................................................................................16
Precautions for Safe Use ...................................................................................... 18
Precautions for Correct Use ................................................................................. 27
Regulations and Standards .................................................................................. 32
Conformance to EU Directives ......................................................................................................................32
Conformance to UL and CSA Standards.......................................................................................................33
Conformance to KC Certification ...................................................................................................................33
Conformance to Shipbuilding Standards .......................................................................................................33
Software Licenses and Copyrights ................................................................................................................33
Versions .................................................................................................................. 34
Checking Versions .........................................................................................................................................34
Unit Versions of CPU Units and Sysmac Studio Versions .............................................................................36
Related Manuals..................................................................................................... 37
Terminology............................................................................................................ 40
Revision History..................................................................................................... 45
Section 1 Introduction to NX-series Controllers
1-1 The NX-series Controllers.....................................................................................................1-2
1-1-1 Features ......................................................................................................................................1-2
1-1-2 Introduction to the System Configurations ..................................................................................1-4
1-2 Specifications.........................................................................................................................1-8
CONTENTS
8NX-series CPU Unit Hardware User’s Manual (W535)

1-3 Overall Operating Procedure for the NX-series Controller ..............................................1-14
1-3-1 Overall Procedure .....................................................................................................................1-14
1-3-2 Procedure Details......................................................................................................................1-14
Section 2 System Configuration
2-1 Basic System Configuration .................................................................................................2-2
2-1-1 EtherCAT Network Configuration ................................................................................................2-2
2-2 Connecting to the Sysmac Studio........................................................................................2-5
2-3 Network Configuration ..........................................................................................................2-6
Section 3 Configuration Units
3-1 CPU Units ...............................................................................................................................3-2
3-1-1 Models and Specifications ..........................................................................................................3-2
3-1-2 Part Names and Functions..........................................................................................................3-2
3-2 SD Memory Cards ................................................................................................................3-10
3-2-1 Models and Specifications ........................................................................................................3-10
3-2-2 Purpose.....................................................................................................................................3-10
3-3 Power Supply Units ............................................................................................................. 3-11
3-3-1 Models and Specifications ........................................................................................................3-11
3-3-2 Part Names and Functions........................................................................................................3-12
3-4 Sysmac Studio .....................................................................................................................3-15
3-4-1 Model Numbers.........................................................................................................................3-15
3-4-2 Connection ................................................................................................................................3-15
Section 4 Installation and Wiring
4-1 Processing at Power ON and Power OFF............................................................................4-2
4-1-1 Power ON Operation...................................................................................................................4-2
4-1-2 Power OFF Operation .................................................................................................................4-3
4-1-3 Resetting the Controller from the Sysmac Studio .......................................................................4-5
4-2 Fail-safe Circuits ....................................................................................................................4-6
4-2-1 Order of Powering Up the Controller and Controlled System .....................................................4-6
4-3 Mounting Units.......................................................................................................................4-9
4-3-1 Installation in a Control Panel .....................................................................................................4-9
4-3-2 Preparations for Installation ......................................................................................................4-13
4-3-3 Installing the CPU Module.........................................................................................................4-15
4-3-4 Mounting the End Cover ...........................................................................................................4-18
4-3-5 Mounting the End Plates ...........................................................................................................4-19
4-3-6 Installing and Removing the SD Memory Card .........................................................................4-20
4-3-7 Removing the CPU Module.......................................................................................................4-23
4-3-8 Assembled Appearance and Dimensions .................................................................................4-26
4-4 Wiring....................................................................................................................................4-28
4-4-1 Power Supply Wiring.................................................................................................................4-28
4-4-2 Grounding .................................................................................................................................4-31
4-4-3 Wiring the Built-in EtherCAT Port ..............................................................................................4-35
4-4-4 Wiring the Built-in EtherNet/IP Port...........................................................................................4-35
4-5 Control Panel Installation....................................................................................................4-36
4-5-1 Temperature ..............................................................................................................................4-36
4-5-2 Humidity ....................................................................................................................................4-37
4-5-3 Vibration and Shock ..................................................................................................................4-38
4-5-4 Atmosphere...............................................................................................................................4-38
4-5-5 Electrical Environment ..............................................................................................................4-38
CONTENTS
9
NX-series CPU Unit Hardware User’s Manual (W535)

4-5-6 Grounding .................................................................................................................................4-43
Section 5 Troubleshooting
5-1 Overview of Troubleshooting ...............................................................................................5-2
Section 6 Inspection and Maintenance
6-1 Cleaning and Maintenance....................................................................................................6-2
6-1-1 Cleaning ......................................................................................................................................6-2
6-1-2 Periodic Inspections ....................................................................................................................6-2
6-1-3 Unit Replacement Precautions....................................................................................................6-4
6-2 Replacing the Battery ............................................................................................................6-6
6-2-1 Battery Replacement...................................................................................................................6-6
6-2-2 Operation without a Battery.......................................................................................................6-10
6-3 Replacing the Fan Unit ........................................................................................................6-12
6-3-1 Purpose of Attaching the Fan Unit ............................................................................................6-12
6-3-2 Fan Unit Replacement Period ...................................................................................................6-12
6-3-3 Fan Unit Used for Replacement................................................................................................6-12
6-3-4 Procedure of Fan Unit Replacement.........................................................................................6-13
Appendices
A-1 Specifications........................................................................................................................ A-2
A-2 Dimensions............................................................................................................................ A-3
A-2-1 NX-series CPU Units.................................................................................................................. A-3
A-2-2 End Cover .................................................................................................................................. A-4
A-2-3 NX-series Power Supply Units ................................................................................................... A-4
A-2-4 SD Memory Card ....................................................................................................................... A-5
A-3 Version Information .............................................................................................................. A-6
A-3-1 Relationship between Hardware Revisions of CPU Units and Sysmac Studio Versions ........... A-6
Index
CONTENTS
10 NX-series CPU Unit Hardware User’s Manual (W535)

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
11
NX-series CPU Unit Hardware User’s Manual (W535)

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
12 NX-series CPU Unit Hardware User’s Manual (W535)

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.
Statement of security responsibilities for assumed use cases and
against threats
OMRON SHALL NOT BE RESPONSIBLE AND/OR LIABLE FOR ANY LOSS, DAMAGE, OR EX-
PENSES DIRECTLY OR INDIRECTLY RESULTING FROM THE INFECTION OF OMRON PROD-
UCTS, ANY SOFTWARE INSTALLED THEREON OR ANY COMPUTER EQUIPMENT, COMPUTER
PROGRAMS, NETWORKS, DATABASES OR OTHER PROPRIETARY MATERIAL CONNECTED
THERETO BY DISTRIBUTED DENIAL OF SERVICE ATTACK, COMPUTER VIRUSES, OTHER
TECHNOLOGICALLY HARMFUL MATERIAL AND/OR UNAUTHORIZED ACCESS.
It shall be the users sole responsibility to determine and use adequate measures and checkpoints to
satisfy the users particular requirements for (i) antivirus protection, (ii) data input and output, (iii) main-
taining a means for reconstruction of lost data, (iv) preventing Omron Products and/or software instal-
led thereon from being infected with computer viruses and (v) protecting Omron Products from unau-
thorized access.
Terms and Conditions Agreement
13
NX-series CPU Unit Hardware User’s Manual (W535)

Safety Precautions
Definition of Precautionary Information
The following notation is used in this manual to provide precautions required to ensure safe usage of
an NX-series Controller.
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.
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.
WARNING
Caution
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.
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 high temperatures.
Warnings
WARNING
Safety Precautions
14 NX-series CPU Unit Hardware User’s Manual (W535)

During Power Supply
Do not touch any of the terminals or terminal blocks while the power is being supplied.
Doing so may result in electric shock.
Do not attempt to take any Unit apart.
In particular, high-voltage parts are present in the Power Supply Unit while power is
supplied or immediately after power is turned OFF. Touching any of these parts may
result 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, slaves, or Units or due to other ex-
ternal 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 Controller outputs may remain ON or OFF due to deposition or burning of the out-
put relays or destruction of the output transistors. As a countermeasure for such prob-
lems, external safety measures must be provided to ensure safe operation of the sys-
tem.
The CPU Unit will turn OFF all outputs from Digital Output Units in the following cases.
The slaves will operate according to the settings in the slaves.
• If an error occurs in the power supply
•If a CPU error or CPU reset occurs
• If a major fault level Controller error occurs
• While the CPU Unit is on standby until RUN mode is entered after the power is
turned ON
• If a system initialization error occurs
External safety measures must be provided to ensure safe operation of the system in
such cases.
If external power supplies for slaves or other devices are overloaded or short-circuited,
the voltage will drop, outputs will turn OFF, and the system may be unable to read in-
puts. Provide external safety measures in controls with monitoring of external power
supply voltage as required so that the system operates safely in such a case.
Unintended outputs may be performed when an error occurs in variable memory or
memory for CJ-series Units. As a countermeasure for such problems, external safety
measures must be provided to ensure safe operation of the system.
Provide measures in the communications system and user program to ensure safety in
the overall system even if errors or malfunctions occur in data link communications or
remote I/O communications.
If there is interference in remote I/O communications or if a major fault level error oc-
curs, output status will depend on the products that are used.
Confirm the operation that will occur when there is interference in communications or a
major fault level error, and implement safety measures.
Correctly set all of the settings in the slaves and Units.
Safety Precautions
15
NX-series CPU Unit Hardware User’s Manual (W535)

The NX-series Controller continues normal operation for a certain period of time when
a momentary power interruption occurs. This means that the NX-series Controller may
receive incorrect signals from external devices that are also affected by the power in-
terruption.
Accordingly, take suitable actions, such as external fail-safe measures and interlock
conditions, to monitor the power supply voltage of the external device as required.
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
other 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 slaves and Units are
within the specified ranges.
Inputting voltages or currents that are outside of the specified ranges may cause acci-
dents or fire.
Downloading
Always confirm safety at the destination before you transfer a user program,
configuration data, setup data, device variables, or values in memory used for CJ-ser-
ies Units from the Sysmac Studio.
The devices or machines may perform unexpected operation regardless of the operat-
ing mode of the CPU Unit.
Actual Operation
Check the user program, data, and parameter settings for proper execution before you
use them for actual operation.
Cautions
Caution
Application
Do not touch any Unit when power is being supplied or immediately after the power
supply is turned OFF. Doing so may result in burn injury.
Wiring
Safety Precautions
16 NX-series CPU Unit Hardware User’s Manual (W535)

Be sure that all terminal screws and cable connector screws are tightened to the tor-
que specified in the relevant manuals. The loose screws may result in fire or malfunc-
tion.
When you connect a computer or other peripheral device to a Controller that has a
non-isolated DC Power Supply Unit, either ground the 0-V side of the external power
supply or do not ground it at all.
If the peripheral devices are grounded incorrectly, the external power supply may be
short-circuited. Never ground the 24-V side of the power supply, as shown in the fol-
lowing figure.
Peripheral device
(e.g., computer)
Non-isolated DC power supply
(internal power supply circuit)
0 V
Peripheral
device cable
External
power supply
24 V
Online Editing
Execute online editing only after confirming that no adverse effects will be caused by deviations in
the timing of I/O. If you perform online editing, the task execution time may exceed the task period,
I/O may not be refreshed with external devices, input signals may not be read, and output timing
may change.
Safety Precautions
17
NX-series CPU Unit Hardware User’s Manual (W535)

Precautions for Safe Use
Disassembly and Dropping
• Do not attempt to disassemble, repair, or modify any Units. Doing so may result in malfunction or
fire.
• Do not drop any Unit or subject it to abnormal vibration or shock. Doing so may result in Unit mal-
function or burning.
Mounting
• The sliders on the tops and bottoms of the Power Supply Unit and CPU Unit must be completely
locked (until they click into place) after connecting the adjacent Unit connectors.
• Do not apply labels or tape to the Unit. When the Unit is installed or removed, adhesive or scraps
may adhere to the pins in the NX bus connector, which may result in malfunctions.
• Do not touch the pins in the NX bus connector on the Unit. Dirt may adhere to the pins in the NX bus
connector, which may result in malfunctions.
NG
PORT1 EtherNet/IP
PORT2 EtherNet/IP PORT3 EtherCAT
• Do not write on the CPU Unit with ink within the restricted region that is shown in the following fig-
ure. Also do not get this area dirty. When the Unit is installed or removed, ink or dirt may adhere to
the pins in the NX connector, which may result in malfunctions.
Restricted region
(shaded portion)
Precautions for Safe Use
18 NX-series CPU Unit Hardware User’s Manual (W535)