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Standards

Safety Light Curtain

Model  

F3SG-

SR

-K

• 

The F3SG-SR is designed and manufactured according to the following standards.
EN61496-1 (Type 4 and Type 2 ESPE), EN 61496-2 (Type 4 and Type 2 AOPD), 
EN61508-1 through -4 (SIL 3 for Type 4 and SIL 1 for Type 2),
EN ISO 13849-1:2015 (PL e, Category 4 for Type 4 and PL c, Category 2 for Type 2)

• 

Dispose in accordance with applicable regulations.

EU Declaration of Conformity

OMRON declares that the F3SG-SR is in conformity with the requirements of the 
following EU Directives:

Machinery Directive 2006/42/EC, EMC Directive 2014/30/EU

© OMRON Corporation  

2020

  All Rights Reserved.

Original instructions

Alert Statements

Users

Machines

Instruction Sheet

Thank you for purchasing the F3SG-SR Series Safety Light Curtain (hereinafter 
referred to as the "F3SG-SR"). Be sure to have F3SG-SR be handled by a 
"Responsible Person" who is well aware of and familiar with the machine to be 
installed. The term "Responsible Person" used in this document means the person 
qualified, authorized and responsible to secure "safety" in each process of the 
design, installation, operation, maintenance services and disposition of the 
machine. It is assumed that F3SG-SR will be used properly according to the 
installation environment, performance and function of the machine.
Responsible Person should conduct risk assessment on the machine and 
determine the suitability of this product before installation. Read this document and 
reference manuals for F3SG-SR thoroughly to understand and make good use of 
the descriptions before installing and operating the product. Keep this document at 
the place where the operator can refer to whenever necessary.

Precautions for Correct Use

Reference Manuals

The F3SG-SR must be installed, configured, and incorporated into a 
machine control system by a sufficiently trained and qualified person. An 
unqualified person may not be able to perform these operations properly, 
which may cause a person to go undetected, resulting in serious injury.

Do not use this sensor for machines that cannot be stopped quickly by 
electrical control. For example, do not use it for a pressing machine 
that uses full-rotation clutch. Otherwise, the machine may not stop 
before a person reaches the hazardous part, resulting in serious injury.

To use the F3SG-SR in PSDI mode (initiation of cyclic operation by a 
presence sensing device), you must configure an appropriate circuit between 
the F3SG-SR and the machine. For details about PSDI, refer to OSHA 
1910.217, IEC 61496-1, and other relevant standards and regulations.

EN

Installation

Document Title

Safety Light Curtain F3SG-

SR

 Series

Safety Multi-Light Beam F3SG-

PG

 Series 

User’s Manual

Cat. No.

Z405-E1

2871537-9

Safety Light Curtain F3SG-

SR

□-K

 Series 

Quick Installation Manual

In the interest of product improvement, specifications are subject to change without notice.

Instructions in the official EU languages and a signed EU Declaration of Conformity in 
English are available on our website at www.industrial.omron.eu/safety.

2865458-2A

Indications and Meanings for Safe Use

The precautions listed in this document indicated by alert symbols and statements must be 
followed for the safe use of the F3SG-SR. Failure to follow all precautions and alerts may result in 
an unsafe use or operation.Thoroughly read this document before using the F3SG-SR.
The following word and symbols are used in this document.

Meaning of Signal Word

Safety Precautions

Indicates a potentially hazardous situation which, if 
not avoided, will result in minor or moderate injury, 
or may result in serious injury or death. Additionally 
there may be significant property damage.

WARNING

Indicates an imminently hazardous situation which, if not 
avoided, is likely to result in serious injury or may result in 
death. Additionally there may be severe property damage.

DANGER

WARNING

WARNING

Make sure Responsible Person tests the operation of the F3SG-SR and F39-SGIT-IL3 
after installation to verify that the F3SG-SR and F39-SGIT-IL3 operate as intended. Make 
sure to stop the machine until the test is complete. Unintended installation, wiring or 
function settings may cause a person to go undetected, resulting in serious injury.

Install a protective structure so that the hazardous part of a machine can only be 
reached by passing through the sensor's detection zone. If access to the hazardous 
part by reaching over the detection zone of a vertically mounted F3SG-SR cannot be 
excluded, the height of the detection zone and the safety distance shall be determined 
in consideration of such a risk. Install the sensors so that part of the person is always 
present in the detection zone when working in a machine's hazardous zones. If a 
person is able to step into the hazardous zone of a machine and remain behind the 
F3SG-SR's detection zone, configure the system with Restart Interlock function. Failure 
to do so may result in serious injury due to unexpected startup.
Install the reset switch in a location that provides a clear view of the entire 
hazardous zone and where it cannot be activated from within the hazardous zone.
Install the pre-reset switch always in the hazardous zone and 
where it cannot be activated from outside the hazardous zone.
The F3SG-SR cannot protect a person from an object flying from 
the hazardous zone. Install protective cover(s) or fence(s).
Install a protective structure to cover the whole blanked zone in order to prevent 
personnel approach to hazardous part of the machine through the blanked zone.
Detection capability gets larger when Fixed Blanking, Floating Blanking or 
Reduced Resolution function is used. When these functions are used, the 
safety distance calculation must be based on the increased detection 
capability for these functions. Otherwise, the machine may not stop before 
a person reaches to the hazardous part, resulting in serious injury.
If detection capability may get larger and a human body may pass 
a detection zone to reach a hazardous source, additional safety 
protection equipment must be installed such as a safety fence.

The Muting and Override functions disable the safety functions of the device. 
Especially setting the Muting Time Limit parameter to infinite may cause the safety 
functions to be disabled for a long time. Install the F3SG-SR, muting sensor and 
physical barrier and configure time settings for Muting and Override so that an 
operator should not enter hazardous zone when the Muting and Override are active.
Install muting sensors so that they can distinguish between the object 
that is being allowed to pass through the detection zone and a person. 
If the Muting function is activated by the detection of a person, the 
machine may not stop operating, resulting in serious injury.

Muting lamps that indicate the state of the Muting and Override functions must be 
installed where they are clearly visible to workers from all the operating positions.
Use two independent input devices for muting inputs. Failure to do so 
may cause the MUTING state due to a single muting sensor's failure.
Install the switch to activate the Override function in a location that 
provides a clear view of the entire hazardous zone and where it cannot 
be activated from within the hazardous zone. Make sure that nobody is 
in the hazardous zone before activating the Override function.

Make sure to connect an override cancel switch to the RESET line when 
using the Override function. Otherwise, the OVERRIDE state may not 
be released by the override cancel switch, resulting in serious injury.

Install the F3SG-SR so that it is not affected by reflective surfaces. 
Failure to do so may hinder detection, resulting in serious injury.
When using more than one set of F3SG-SR's in adjacent areas, the emitter of one F3SG-SR 
may interfere with the receiver of the other, causing the safety functions to stop working 
properly. Install, configure and maintain them so that mutual interference does not occur. 

To change the response time, calculate the safety distance based on the setting. Otherwise, the 
machine may not stop before a person reaches the hazardous part, resulting in serious injury.

Do not use the F3SG-SR with mirrors in a retro-reflective configuration. Doing so may hinder 
detection. It is possible to use mirrors to alter the detection zone to a 90-degree angle.

Make sure to install the F3SG-SR at the safety distance from the hazardous part of the machine. Otherwise, 
the machine may not stop before a person reaches the hazardous part, resulting in serious injury.

Position with detection zone bent at 90°

Mirror

Mirror

Position with retro-reflection

WARNING

Other

Settings

Configure the system by using the optimal number of safety outputs 
that satisfy the requirements of the necessary safety category.
Do not connect each line of the F3SG-SR to a DC power supply of higher than 24 VDC+20%. 
Also, do not connect it to an AC power supply. Failure to do so may result in electric shock.

Make sure to perform wiring while the power supply is OFF.

Do not use the output signal of the auxiliary output or IO-Link output for safety 
applications. Failure to do so may result in serious injury when the F3SG-SR fails.

Double or reinforced insulation from hazardous voltage must be applied 
to all input and output lines. Failure to do so may result in electric shock.
Extension of the cable must be within a specified length. If it isn't, 
safety functions may not work properly, resulting in danger.

For the F3SG-SR to comply with IEC 61496-1 and UL 508, the DC power 
supply unit must satisfy  
all of the following conditions:
• The DC power supply operates within the rated power voltage (24 VDC ± 20%).
• The DC power supply has tolerance against the total rated current of 

devices if it is connected to multiple devices.

• The DC power supply complies with EMC directives (industrial environment).
• Double or reinforced insulation is applied between the primary and secondary circuits.
• The DC power supply has an automatic recovery type of overcurrent protection characteristics.
• Output holding time is 20 ms or longer.
• The DC power supply satisfies output characteristic requirements for class 2 circuit or 

limited voltage current circuit defined by UL 508. 

•  The DC power supply complies with laws and regulations, regarding EMC and electrical 

equipment safety, of the country or region where the F3SG-SR is used. (For example, in 
EU, the power supply must comply with the EMC Directive and the Low Voltage Directive.)

Make sure the Responsible Person test the operation of the F3SG-SR after setting with 
the DIP Switch on the F39-SGIT-IL3, Teach-in or SD Manager 3 to verify that the 
F3SG-SR operates as intended. Make sure to stop the machine until the test is complete. 
Unintended settings may cause a person to go undetected, resulting in serious injury.

Perform daily and 6-month inspections for all F3SG-SR as described in the User's Manual or the Quick 
Installation Manual. When using the F3SG-SR in cascade connection, perform inspections for every 
connected F3SG-SR. Otherwise, the system may fail to work properly, resulting in serious injury.
Do not try to disassemble, repair, or modify the product. Doing so 
may cause the safety functions to stop working properly.
Do not use the product in environments where flammable or 
explosive gases are present. Doing so may result in explosion.
Do not use the F3SG-SR in environments where strong electromagnetic field may 
be produced. Doing so may cause the safety functions to stop working properly.

WARNING

WARNING

Precautions for Safe Use

Make sure to observe the following precautions that are necessary for ensuring 
safe use of the product.

Storage conditions and installation environment

• Do not install, use, or store the product in the following types of environments:

- Areas exposed to intense interference light, such as direct sunlight
- Areas with high humidity where condensation is likely to occur
- Areas where corrosive gases are present
- Areas exposed to vibration or shock levels higher than in the specification provisions
- Areas where the pollution degree is harsher than 3, such as outdoor environment
- Areas where the product may get wet with liquid that can solve adhesive

• When carrying and installing the product, make sure that two people work together 

according to the weight of the product so that it should not fall. Otherwise injury and/or 
property damage may occur.

Wiring and installation

• The rated life of the LEDs used for this product is 6 years.
• Loads must satisfy both of the following conditions:

- Not short-circuited
- Not used with a current that is higher than the rating

• Make sure that the mounting brackets and fixing screws are properly secured 

with the  specified torque.

• Bending radii of cables must be equal to or higher than specified minimum values.
• When replacing the cables with those other than the dedicated cables, use cable 

connectors that provide a protection grade of IP54 or higher, for the cables.

• To extend a cable length with a cable other than the dedicated cable, use a 

cable with the same or superior specifications.

• Be sure to route the input/output lines for the F3SG-SR separate from high-potential power 

lines or through an exclusive conduit. 

• Make sure that foreign material such as water, oil, or dust does not enter the 

F39-SGIT-IL3 or the connector while the cover of the DIP Switch on the 
F39-SGIT-IL3 is removed.

• The F39-SGIT-IL3 is dedicated to the F3SG-SR series. Do not use it for the 

equipment other than F3SG-SR.

Water-proof

•  Do not use the product with degraded protective structure such as swelling 

and crack in housing and/or sealing components. Otherwise water or other 
substance may enter the product, resulting in a risk of corruption or burning.

Disposal

• Dispose of the product in accordance with the relevant rules and regulations of 

the country or area where the product is used.

Observe the precautions described below to prevent operation failure, malfunctions, 
or undesirable effects on product performance.

Storage conditions and installation environment

• Do not install, use, or store the product in the following types of environments:

- Areas with a temperature or humidity out of the specified range
- Areas submerged in water or subject to rain water

• This is a class A product (for industrial environments). In residential areas it may cause radio interference, 

in which case the Responsible Person may be required to take adequate measures to reduce interference

• Use the sensor after water droplets have been removed when water droplets such as 

condensation have adhered to the optical surface of the sensor.

Wiring and installation

• Properly perform the wiring after confirming the signal names of all the terminals. 
• Do not operate the control system until 3 s or more after turning ON the power of the F3SG-SR.
• When using a commercially available switching regulator power supply, make sure to 

ground the PE terminal (protective earth terminal). 

• Install the emitter and receiver to the same vertical direction.
• Use brackets of specified quantities and locations according to the dimensions. If the 

brackets described above are not used, ratings and performance cannot be met.

• Do not install the F3SG-SR close to a device that generates high-frequency noise. 

Otherwise, take sufficient blocking measures.

• Sharing the power supply with other devices may cause the F3SG-SR to be affected 

by noise or voltage drop. It is recommended that the F3SG-SR use a power supply 
dedicated for safety components, not shared with other devices.

• Do not change the scan code during normal operation. The F3SG-SR transitions to lockout.
• Do not apply load to the connectors.
• The operating range of the F3SG-SR-K is about 20% lower than the normal model.

Cleaning

• Do not use thinner, benzene, or acetone for cleaning. They affect the product's resin parts and paint on the housing.
• Use a soft cloth which is dry or wetted with clean water for cleaning. Do not use solvents. 

Object detection

• The F3SG-SR cannot detect transparent and/or translucent objects.

Settings

• Do not operate the DIP Switch on the F39-SGIT-IL3 during normal operation of the 

F3SG-SR. Otherwise, the F3SG-SR enters the LOCKOUT state.

• Do not operate the DIP Switch and Push Switch on the F39-SGIT-IL3 with tools that 

may damage the product.

• Be sure that the F3SG-SR is in the SETTING state when making a change to the setting.

Stop the machine immediately if the F3SG-SR and the machine 
installed the F3SG-SR does not operate as intended.

DANGER

Wiring

When using the PNP output, connect the load between the output and 0 V line. When using the NPN output, connect the 
load between the output and +24 VDC line. Connecting the load between the output and a different power supply line from 
the above line will result in a dangerous condition because the operation mode of safety outputs are reversed to "Dark-ON".

WARNING

When muting error occurs with workpiece blocking the F3SG-SR, there are 
two methods to forcibly remove the workpiece.
1) Manual operation (with additional safety measure); or
2) Override function (Override at Normal Operation / Override upon Startup)
Only one of the methods, either 1) or 2) must be used.
If they are used at the same time, the Override may be activated at an 
unexpected timing.

When using the PNP output, do not 24 VDC line. When using the NPN output, do not ground 0 V 
line. Otherwise, a ground fault may turn the safety outputs ON, resulting in a failure of stopping the machine.

Suitability for 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 Buyer’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
particular Product with respect to Buyer’s application, product or system.
Buyer shall take application responsibility 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 
EQUIPMENT OR SYSTEM.

OMRON Corporation 

 (Manufacturer)

 Contact:  www.ia.omron.com

Regional Headquarters

Shiokoji Horikawa, Shimogyo-ku, Kyoto, 600-8530 JAPAN

OMRON EUROPE B.V. (Importer in EU)
Wegalaan 67-69, 2132 JD Hoofddorp
The Netherlands
Tel: (31)2356-81-300/Fax: (31)2356-81-388

OMRON ELECTRONICS LLC
2895 Greenspoint Parkway, Suite 200 
Hoffman Estates, IL 60169 U.S.A.
Tel: (1) 847-843-7900/Fax: (1) 847-843-7787

OMRON ASIA PACIFIC PTE. LTD.
No. 438A Alexandra Road # 05-05/08 (Lobby 2), 
Alexandra Technopark, 
Singapore 119967
Tel: (65) 6835-3011/Fax: (65) 6835-2711

OMRON (CHINA) CO., LTD.
Room 2211, Bank of China Tower, 
200 Yin Cheng Zhong Road, 
PuDong New Area, Shanghai, 200120, China
Tel: (86) 21-5037-2222/Fax: (86) 21-5037-2200

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