Definition of Precautionary Information
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.
Original Instructions
EtherCAT
®
is registered trademark and patented technology, licensed by Beckhoff
Automation GmbH, Germany.
Instructions in the official EU languages and a signed EU Declaration of Conformity
in English are available on our website at http://www.ia.omron.com/support/models/.
Trademarks
OMRON declares that NX-series Safety Control Units conform with the
requirements of the following EU Directives and UK Legislations:
EU: EMC Directive 2014/30/EU, Machinery Directive 2006/42/EC,
RoHS Directive 2011/65/EU
UK: 2016 No 1091 EMC, 2008 No 1597 Machinery (Safety),
2012 No 3032 RoHS
Declaration of Conformity
NX-series Safety Control Units are designed and manufactured in accordance with
the following standards:
• EN ISO13849-1: 2015 PLe/Safety category 4
• IEC/EN 62061 SIL CL3
Safety Standards
Do not drop any Unit or subject it to abnormal vibration or shock. Doing so may
result in Unit malfunction or burning.
When transporting any Unit, use the special packing box for it. Also, do not subject
the Unit to excessive vibration or shock during transportation.
Use the I/O power supply capacity within the range that is given in the Unit
specifications.
When wiring or installing the Units, do not allow metal fragments to enter the Units.
When you replace a Unit, start operation only after you transfer the settings and
variables that are required for operation to the new Unit.
Provide suitable power supply capacity according to the reference manuals.
Use the power supply voltage that is specified in the related manuals.
Always turn OFF the power supply to the Units before you attempt any of the following.
• Mounting or removing the Units
• Assembling the Units
• Setting DIP switches or rotary switches
• Connecting cables or wiring the system
•
Connecting or disconnecting connectors, or removing or attaching terminal blocks
Power Supply Unit may continue to supply power to the rest of the Units for a few
seconds after the power supply turns OFF. The PWR indicator is lit during this
time. Confirm that the PWR indicator is not lit before you perform any of the above.
Do not exceed the ranges that are given in the specifications for the
communications distance and number of connected Units.
Mount terminal blocks and connectors only after checking the mounting location
carefully. Be sure that the terminal blocks, expansion cables, and other items with
locking devices are properly locked into place.
Do not apply voltages that exceed the rated value to any Input Unit.
Double-check all wiring and switch settings to make sure that they are correct
before turning ON the power supply.
Double-check all wiring before turning ON the power supply. Use the correct wiring
parts and tools when you wire the system.
Precautions for Safe Use
Safety Precautions
Serious injury may possibly occur due to loss of
required safety functions.
• Use equipment and parts that comply with applicable
standards for the required safety levels and safety
categories for all safety functions.
• Wire the safety input and output lines so that they do
not touch other lines.
• Perform user testing and confirm that all of the Safety
Control Unit configuration data and operation is
correct before starting system operation.
• Do not use indicators on the Safety Control Unit for
safety operations.
• Wire the Safety Control Unit properly so that 24-VDC
lines do not touch output lines accidentally or
unintentionally.
• Wire the safety output lines and 24-VDC lines so that
ground faults will not cause the loads to turn ON.
• When replacing a Safety Control Unit, confirm that the
model of the Unit is correct, confirm that the Unit and
terminal block mounting positions are correct,
configure the replacement Unit suitably, and confirm
that the Unit operates correctly.
Do not turn OFF the power supply while data is being transferred.
Follow the instructions in the manuals to correctly perform installation and wiring.
Do not operate or store the Units in the following locations. Doing so may result in
malfunction, in operation stopping, or in burning.
• 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 water, oil, or chemicals
• Locations subject to shock or vibration
• Locations subject to static electricity
Take appropriate and sufficient countermeasures when installing the Controller in
the following locations.
• Locations subject to strong, high-frequency noise
• 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 lines
Before touching a Unit, be sure to first touch a grounded metallic object in order to
discharge any static build-up.
Use the rated power supply voltage for the Units that supply power. Take
appropriate measures to ensure that the specified power with the rated voltage and
frequency is supplied in locations where the power supply is unstable.
Periodic Inspections and Maintenance
• Do not disassemble, repair, or modify the Safety Control Unit. Doing so may lead
to loss of safety functions.
Disposal
• Be careful not to injure yourself when dismantling the Safety Control Unit.
Precautions for Correct Use
Safety Precautions
These products comply with the EU Directives when they are built into a PLC
system or Machine Automation Controller. Observe the following precautions and
follow the installation methods that are given in this document to ensure
compliance with the EU Directives.
• The Controller must be installed within a metallic control cabinet.
• You must use the DC power supplies connected to Units that supply DC power.
(a) The secondary circuit of the DC power supply must be isolated from the
primary circuit by double insulation or reinforced insulation.
(b) The output hold time must be 20 ms or longer.
(c) The DC power supply must be an SELV power supply that satisfies the
requirements of EN 62368-1 and EN 61558-2-16.
• Do not use a cable that is longer than 3 m for the power supply.
Also refer to the relevant manuals.
This is a Class A product (for industrial environments). In a residential
environment, it may cause radio interference, in which case the user may be
required to take appropriate measures.
Ａ급 기기（업무용 방송통신기자재） 이 기기는 업무용(Ａ급) 전자파적합기기로서
판매자 또는 사용자는 이 점을 주의하시기 바라며,가정외의 지역에서 사용하는 것을
목적으로 합니다.
Conformance to EU Directives
WARNING
Caution
WARNING
Make sure that the area around the system is safe
before you change operating modes, change present
values, or execute forced refreshing. Otherwise, the
outputs may operate and may cause serious injury.
Always confirm safety at the destination before you
transfer the Unit Configuration Information, parameters,
set values, or other data from the Sysmac Studio or
other Support Software. The devices or machines may
perform unexpected operation regardless of the
operating mode of the CPU Unit.
Make sure that the voltages and currents that are input
to the Units and slaves are within the specified ranges.
Inputting voltages or currents that are outside of the
specified ranges may damage the Units or slaves or
cause fire.
© OMRON Corporation 2013-2022 All Rights Reserved.
EN
Instruction Manual
NX Series Safety Control Units
NX-SL Safety CPU Units
NX-SID/SIH Safety Input Units
NX-SOD/SOH Safety Output Units
5721146-0B
Thank you for purchasing an NX-series Safety Control Units.
This product is the controller used for the machine
safety control.
Only qualified persons trained in professional electrical
procedures must be allowed to handle an NX-series
Safety Control Units.
To ensure the safe usage of the Controller, read and
understand this document, the NX-series Safety Precautions,
and the manuals for all other Units in the Controller.
Contact your OMRON representative and make sure
that you use the most recent version of each manual.
Keep this document, the NX-series Safety Precautions,
and all relative manuals in a safe place, and make sure
that they are delivered to the final user of the Controller.
OMRON Corporation
Safety inputs 4 points
Item NX-SIH400
Unit power
consumption
Connected to a CPU Unit or a
Communication Control Unit
1.10 W max.
Connected to a
Communications Coupler Unit
0.70 W max.
8 points
Test outputs 2 points
2 points
Weight 70 g max.
70 g max.
Current
consumption from
I/O power supply
20 mA max. 20 mA max.
NX-SID800
Connected to a CPU UNIT or
a Communication Control Unit
1.10 W max.
Connected to a
Communications Coupler Unit
0.75 W max.
The environment and I/O specifications of NX-series Safety Control Units are given
below.
*1. Gravitational acceleration is G = 9.8 m/s
2
.
Specifications
The appearance of the NX-series Safety Control Unit is shown below. Please check
the names and functions of each part.
Part Names and Functions
*1. (G) to (H) are not provided for NX-SL3300/SL3500.
Unit power supply voltage 24 VDC (20.4 to 28.8 VDC, supplied from NX bus)
Item Specification
I/O power supply voltage 24 VDC (20.4 to 28.8 VDC, supplied from NX bus)
Isolation class CLASS III (SELV)
Overvoltage category Category II: Meets IEC 61010-2-201
Noise immunity Conforms to IEC 61131-2
Vibration resistance 5 to 8.4 Hz: 3.5 mm, 8.4 to 150 Hz: 9.8 m/s
2
*1
Shock resistance 147 m/s
2
*1: 11 ms
Installation method DIN Track (IEC 60715 TH35-7.5/TH35-15)
Ambient operating temperature
0 to 55°C
Ambient operating humidity 10% to 95% (with no condensation or icing)
Ambient storage temperature -25 to 70°C (with no condensation or icing)
Atmosphere Must be free from corrosive gases.
Safety outputs 2 points
Item NX-SOH200
Unit power
consumption
Connected to a CPU UNIT or
a Communication Control Unit
1.05 W max.
Connected to a
Communications Coupler Unit
0.70 W max.
4 points
Weight 65 g max. 65 g max.
Current
consumption from
I/O power supply
40 mA max. 60 mA max.
NX-SOD400
Connected to a CPU UNIT or
a Communication Control Unit
1.10 W max.
Connected to a
Communications Coupler Unit
0.75 W max.
Weight 75 g max.
Item NX-SL3300/SL3500
Unit power
consumption
Connected to a CPU Unit
1.25 W max.
Connected to a
Communications Coupler Unit
0.90 W max.
130 g max.
NX-SL5500/SL5700
3.35 W max.
(1) Safety Input Specifications
Input type Sinking inputs (PNP)
Item NX-SIH400
Sinking inputs (PNP)
Rated input
voltage
24 VDC
(20.4 to 28.8 VDC)
24 VDC
(20.4 to 28.8 VDC)
Input current 4.5 mA typical 3.0 mA typical
ON voltage 11 VDC min. 15 VDC min.
OFF voltage 5 VDC max. 5 VDC max.
OFF current 1 mA max. 1 mA max.
NX-SID800
(2) Test Outputs
(1) Safety Output Specifications
Output type Sourcing outputs (PNP)
Item NX-SOH200
Rated output
current
2.0 A max/point
4.0 A max/Unit at 40°C
2.5 A max/Unit at 55°C
The maximum load current
depends on the installation
orientation and ambient
temperature.
Sourcing outputs (PNP)
OFF residual voltage
2 V max. 2 V max.
0.1 mA max. 0.1 mA max.
ON residual voltage
1.2 V max. 1.2 V max.
NX-SOD400
0.5 A max/point and 2.0 A
max/Unit
Output type Sourcing outputs (PNP)
Item NX-SIH400
Sourcing outputs (PNP)
Rated output current
25 mA max. 50 mA max.
ON residual voltage
1.2 V max. 1.2 V max.
Leakage current 0.1 mA max. 0.1 mA max.
NX-SID800
(A) Marker attachment
location
Letter
Name
The locations where markers are attached. The
markers made by OMRON are installed for the
factory setting. Commercially available markers
can also be installed.
(B) Protrusions for
removing the Unit
The protrusions to hold when removing the Unit.
(C)
DIN Track mounting hook
This hook is used to mount the NX Unit to a DIN Track.
(E) Unit hookup guides These guides are used to connect two Units.
(F) Indicators
The indicators show the current operating status
and power supply status of the Safety CPU Unit.
Refer to (2) Indicators.
(G) Service switch
This switch is used for the start trigger of various
functions. *1
(H) DIP switch
This switch is used for the Safety Unit Restore and
the safety data logging function. *1
(I) Unit specifications
The specifications of the Safety CPU Unit are given.
(D) NX bus connector This is the NX-series bus connector.
Function
Leakage current
(2) Indicators
NX-SL3300/SL3500/SL5500/SL5700
WhiteSeven-
segment
Indicator
Color
Indicator
The two-digit seven-segment indicator shows
the detailed information on the Safety CPU
Unit.
Green
TS The Unit is operating normally.
Red
―
Status
Lit.
Initialization is in progress (from when the
power supply is turned ON until RUN or
PROGRAM mode is entered), or I/O allocation
information data is being downloaded from the
Sysmac Studio.
Flashing (at
1-s intervals)
―
An NX bus communications error, I/O
allocation information data error, or other
recoverable minor error that is attributed to the
NX bus has occurred.
Not lit. • There is no Unit power supply
• The Unit is restarting
• Waiting for initialization to start
Green
NS
(Network
Status)
*1
Lit
The CIP Safety connections are established.
Flashing (at
1-s intervals)
Red
The CIP Safety connections are not
established.
Flashing (at
1-s intervals)
―
A CIP Safety communications error occurred.
Not lit
The CIP Safety communications are not executed.
Flashing (at
2-s intervals)
Lit. A hardware error, WDT error, or other critical
error has occurred.
Description
Safety CPU Unit
Safety Input Unit
Safety Output Unit
Safety Control Unit
(D)
(D)
(E)
(C)
(I)
(F)
(E)
(A)
(G)
(H)
(C)
(C)
(B)
(E)
(B)
(B)
(G)
(H)
(E)
(1) Part Names
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