Panasonic SF4C-H28, SF4C-H24, SF4C-H32 User guide
sAFETY LIGHT CURTAIN
SF4C
Instruction Manual
BEFORE BEGINNING
The printed English and Japanese versions of this instruction manual are the original versions.
The English, French, German, Italian and Spanish versions published in the Internet are
copies of the original documentation and were produced by Panasonic Electric Works Europe
AG.
Liability and Copyright for the Hardware
This manual and everything described in it are copyrighted. You may not copy this manual, in
whole or part, without written consent of Panasonic Electric Works Europe AG (PEWEU).
PEWEU pursues a policy of continuous improvement of the design and performance of its
products. Therefore we reserve the right to change the manual/product without notice. In no
event will PEWEU be liable for direct, special, incidental, or consequential damage resulting
from any defect in the product or its documentation, even if advised of the possibility of such
damages.
We invite your comments on this manual. Please e-mail us at:
tech-doc@eu.pewg.panasonic.com.
Please direct support matters and technical questions to your local Panasonic representative.
LIMITED WARRANTY
If physical defects caused by distribution are found, PEWEU will replace/repair the product
free of charge. Exceptions include:
• When physical defects are due to different usage/treatment of the product other than
described in the manual.
• When physical defects are due to defective equipment other than the distributed
product.
• When physical defects are due to modifications/repairs by someone other than
PEWEU.
• When physical defects are due to natural disasters.
Important Symbols
One or more of the following symbols may be used in this documentation:
DANGER!
1.
2.
3.
!
CAUTION
Indicates that you should proceed with caution. Failure to do so may result in
injury or significant damage to instruments or their contents, e.g. data.
NOTE
Contains important additional information.
EXAMPLE
Contains an illustrative example of the previous text section.
Procedure
The warning triangle indicates especially important safety
instructions. If they are not adhered to, the results could be fatal
or critical injury.
Indicates that a step-by-step procedure follows.
REFERENCE
Indicates where you can find additional information on the subject at hand.
SF4C Safety light curtain
Table of Contents
Table of Contents
1. Introduction ............................................................................1
1.1 Target Group ............................................................................................. 2
1.2 Safety Instructions..................................................................................... 3
1.3 Applicable Standards and Regulations...................................................... 6
2. Before Using this Device .......................................................7
2.1 Confirmation of Packed Contents..............................................................8
2.2 Features..................................................................................................... 9
2.3 Part Description....................................................................................... 10
2.3.1 How the Display Works ............................................................................11
2.3.2 Operation of Large Multi-Purpose Indicator.............................................14
2.4 Protection Area........................................................................................ 15
2.4.1 Sensing Area............................................................................................ 15
2.4.2 Safety Distance ........................................................................................ 16
2.4.2.1 Calculation Example for Europe .....................................................18
2.4.2.2 Calculation Example for US ............................................................20
2.4.3 Influence of Reflective Surface ................................................................22
2.4.4 Device Placement ....................................................................................22
2.5 Mounting .................................................................................................. 25
2.5.1 Mounting with Standard Mounting Bracket .............................................. 25
2.5.2 Mounting with Multifunctional Mounting Bracket MS-SFC-3 (optional) ...26
2.5.3 Dead Zoneless Mounting .........................................................................28
2.5.4 Mounting the Intermediate Supporting Bracket MS-SFC-4 .....................31
2.5.5 Mounting the Protective Metal Case ........................................................ 32
iii
Table of Contents
SF4C Safety light curtain
2.6 Wiring .......................................................................................................34
2.6.1 Power Supply Unit....................................................................................34
2.6.2 PNP Output ..............................................................................................36
2.6.3 NPN Output ..............................................................................................38
2.6.4 Output Signal during Self-Diagnosis ........................................................39
2.6.5 Connecting Procedure and Pin Assignment ............................................40
2.6.6 Basic Wiring .............................................................................................42
2.7 Wiring Examples ......................................................................................44
2.7.1 Manual Reset When Interlock is Active....................................................44
2.7.2 Auto-Reset When Interlock is Inactive (Control Category 4) ...................45
2.7.3 Active Safety Input Function (Control Category 4)...................................47
2.7.4 Inactive External Device Monitor Function (Control Category 4).............49
2.7.5 Active Muting Function (Control Category 4) ...........................................51
2.7.6 Beam-axis Alignment ...............................................................................54
2.7.7 Operation Test..........................................................................................56
3. Functions.............................................................................. 59
3.1 Self-Diagnosis Function ...........................................................................60
3.2 Interlock Function .....................................................................................61
3.3 Test Input Function...................................................................................62
3.4 Safety Input Function ...............................................................................63
3.4.1 Serial Connection and Response Time....................................................64
3.4.2 Wiring Example for Safety Contact ..........................................................65
3.4.3 Wiring Example for Safety Sensor ...........................................................66
3.5 Large Multi-purpose Indicator Function....................................................70
3.5.1 Wiring Example of the Large Multi-Purpose Indicator..............................70
3.6 Auxiliary Output (Non-Safety Output).......................................................72
3.7 External Device Monitor Function ............................................................73
3.8 Muting Function........................................................................................75
iv
3.8.1 Specification for the Muting Sensor .........................................................76
SF4C Safety light curtain
3.8.2 Installation of the Muting Sensor.............................................................. 77
3.8.3 Installation Only for the Exit of the Object................................................79
Table of Contents
3.9 Override Function .................................................................................... 81
3.10 Functions of the Optional Handy Controller SFC-HC .............................. 84
4. Operation ..............................................................................87
4.1 Normal Operation .................................................................................... 88
4.2 Using the Test Input Function.................................................................. 90
4.3 When an Error Occurs ............................................................................. 92
4.4 Using the Muting Input Function .............................................................. 93
4.5 Using the Safety Input Function............................................................... 95
5. Maintenance..........................................................................97
5.1 Daily Inspection List................................................................................. 98
5.2 Periodic Inspection Checklist (Every Six Months) ................................. 100
5.3 Inspection after Maintenance................................................................. 101
6. Troubleshooting .................................................................103
6.1 Emitter-Related Problems...................................................................... 104
6.1.1 Indicator Section of the Emitter.............................................................. 104
6.1.2 All Indicators Are OFF............................................................................104
6.1.3 Digital Error Indicator (Red) Lights Up or Blinks .................................... 104
6.1.4 Setting Indicator Lights Up..................................................................... 106
6.1.5 Test input Indicator (Orange) Lights Up................................................. 106
6.1.6 Operation Indicator Remains Lit in Red ................................................. 106
6.2 Receiver-Related Problems................................................................... 107
6.2.1 Indicator Section of the Receiver ...........................................................107
v
Table of Contents
6.2.2 All Indicators Are OFF ............................................................................107
6.2.3 Setting Indicator "C" Lights Up...............................................................107
6.2.4 Fault Indicator (Yellow) Lights up or Blinks............................................108
SF4C Safety light curtain
7. Specifications and Dimensions ........................................ 111
7.1 Specifications by Model Numbers ..........................................................112
7.1.1 Model Numbers SF4C-Hxx<V2> with 20mm Beam Pitch......................112
7.1.2 Model Numbers SF4C-Hxx with Pigtailed Type.....................................113
7.2 Common Specifications..........................................................................114
7.3 Options ...................................................................................................117
7.3.1 Cables ....................................................................................................117
7.3.1.1 Extension Cable with Connector on One End...............................117
7.3.1.2 Extension Cable with Connectors on Both Ends ..........................117
7.3.1.3 Y-Type Connector .........................................................................118
7.3.2 Brackets..................................................................................................118
7.3.2.1 Standard Mounting Bracket MS-SFC-1.........................................118
7.3.2.2 NA2_N Compatible Mounting Bracket ..........................................118
7.3.2.3 Multifunctional Mounting Bracket MS-SFC-3 ................................ 119
7.3.2.4 Mounting Bracket MS-SFC-4 ........................................................119
7.3.3 Protective Metal Case ............................................................................120
7.3.4 Handy Controller ....................................................................................120
7.3.5 Test Rod.................................................................................................121
8. Dimensions......................................................................... 123
8.1 Mounting Dimensions.............................................................................124
8.1.1 Centered Mounting with Standard Mounting Brackets...........................124
8.1.2 Standard Mounting Bracket without Dead Space ..................................125
8.1.3 Multifunctional Mounting Bracket ...........................................................126
8.1.4 Multifunctional Mounting Bracket without dead zone.............................127
vi
8.1.5 Mounting of the Protective Metal Case ..................................................128
SF4C Safety light curtain
Table of Contents
8.2 Mounting Brackets ................................................................................. 129
8.2.1 Standard Mounting Bracket MS-SFC-1 .................................................129
8.2.2 Mounting Bracket MS-SFC-2 ................................................................. 129
8.2.3 Multifunctional Mounting Bracket MS-SFC-3......................................... 130
8.2.4 Multifunctional Mounting Bracket MS-SFC-3 (without Dead Zone) ...... 130
8.2.5 Multifunctional Intermediate Supporting Bracket MS-SFC-4 ................. 131
8.2.6 Protective Metal Case ............................................................................ 131
9. Glossary of Terms..............................................................133
10. Index ...................................................................................135
vii
Chapter 1
Introduction
Introduction
SF4C Safety light curtain
1.1 Target Group
Thank you for purchasing the Safety Light Curtain from the SF4C series. Please read this
instruction manual carefully and thoroughly for the correct and optimum use of this product.
Kindly keep this manual in a convenient place for quick reference.
The SF4C is a light curtain for protecting a person from dangerous parts of a machine which can
cause injury or accident.
This manual has been written for the following personnel who:
• have undergone suitable training and have knowledge of light curtains as well as safety
systems and standards.
• who are responsible for the introduction of this device
• who design systems using the SF4C
• who install and connect the SF4C
• who manage and operate a plant using the SF4C
Machine designer, installer, employer and operator
The machine designer, installer, employer and operator are solely responsible for ensuring that
all applicable legal requirements relating to the installation and the use in any application are
satisfied and all instructions for installation and maintenance contained in the instruction manual
are followed.
Whether this device functions as intended and systems including the SF4C comply with safety
regulations depend on the appropriateness of the application, installation, maintenance and
operation. The machine designer, installer, employer and operator are solely responsible for
these items.
Engineer
The engineer must be a person who is appropriately trained, has widespread knowledge and
experience, and can solve various problems which may arise in his field of work, e.g. as a
machine designer or a person in charge of installation or operation, etc.
Operator
The operator should read this instruction manual thoroughly, understand its contents, and
perform operations following the procedures described in this manual for the correct operation
of this device.
In case this device does not perform properly, the operator should report this to the person in
charge and stop machine operation immediately. The machine must not be used until correct
performance of this device has been confirmed.
2
SF4C Safety light curtain
1.2 Safety Instructions
DANGER!
1.2 Safety Instructions
!
• Use the SF4C as per its specifications. Do not modify the safety light curtain
since its functions and capabilities may not be maintained and it may
malfunction.
• The SF4C has been developed/produced for industrial use only.
• Do not use the SF4C under conditions or in environments not described in
this manual. Please consult us if there is no other choice but to use this
device in such an environment.
• Do not use the safety light curtain in fields such as nuclear power control,
railroad, aircraft, automobiles, combustion facilities, medical systems,
aerospace development, e.g. in applications where failure could result in
large-scale damage to society or people.
• When the safety light curtain is to be used for enforcing protection of a
person from any danger occurring around an operating machine, the user
must satisfy the regulations established by national or regional security
committees.
• No matter what kind of equipment you use the device with, follow the safety
regulations in regard to appropriate usage, mounting (installation), operation
and maintenance.
Please adhere to the following safety instructions when
you install and operate the SF4C. Failure to do so can
result in fatal or critical injury during unprotected use of
hazardous machinery.
• Use the safety light curtain by installing suitable protective equipment as a
countermeasure for failure, damage, or malfunction of this device.
• Before using this light curtain, check whether it performs properly and has
the functions and capabilities as stated in the design specifications.
• Dispose of the safety light curtain as industrial waste.
Environment
• Do not use a mobile phone or a radio phone near the SF4C.
• If the safety light curtain is installed in a place where there are reflective
surfaces, make sure to install it so that reflected light from the reflective
surfaces does not affect the receiver. Alternatively, take countermeasures
such as painting, masking, roughening, or changing the material of the
reflective surfaces, etc. Failure to do so may cause the SF4C not to detect
properly, which may result in death or serious injury.
• Do not install the safety light curtain in the following environments:
- Areas exposed to intense interference light such as direct sunlight
3
Introduction
Installation
• Always keep the correctly calculated safety distance between the safety light
• Install an extra protective structure around the machine so that the operator
• Install the safety light curtain in a manner that some part of the operator's
• Do not install the safety light curtain at a location where it can be affected by
SF4C Safety light curtain
- Areas with high humidity where condensation is likely to occur
- Areas exposed to corrosive or explosive gases
- Areas exposed to vibration or shock at levels higher than those specified
- Areas exposed to contact with water
- Areas exposed to excessive steam or dust
- Areas where the beam-receiving part of this device is directly exposed to
light from a high-frequency fluorescent lamp (inverter type) or
rapid-starter fluorescent lamp.
curtain and the dangerous parts of the machine.
must pass through the sensing area of the safety light curtain to reach the
dangerous parts of the machine.
body always remains in the sensing area until the operator has finished
working with the dangerous parts of the machine.
wall reflection.
• When installing multiple sets of the SF4C, connect the sets and, if necessary,
install some barriers so that mutual interference does not occur.
• Do not use any reflection type or recursive reflection type arrangement.
Equipment in which this device is installed
• When the safety light curtain is used in the PSDI (see page
appropriate control circuit must be configured between this device and the
machinery. For details, be sure to refer to the standards or regulations
applicable in each region or country.
• In Japan, do not use the SF4C as safety equipment for a press machine.
• Do not install the SF4C with a machine whose operation cannot be stopped
immediately in the middle of an operation cycle by an emergency stop.
• The SF4C provides safety 2 seconds after the power has been switched ON.
Make sure that the control system takes the time delay into consideration.
Wiring
• Switch off the power before wiring the safety light curtain.
• All electrical wiring should conform to the regional electrical regulations and
laws. The wiring should be done by skilled personnel with the required
electrical knowledge.
• Do not run the sensor cable together with high-voltage lines or power lines
or put them together in the same raceway.
134) mode, an
4
SF4C Safety light curtain
• In case you need to extend the cable of the emitter or the receiver, each can
be extended up to 40.5m by using the exclusive cable. Furthermore, if the
cable is extended and the muting lamp is used, the allowed total extendable
length is reduced (see "
40).
• Do not control the device at only one control output (OSSD 1, OSSD 2) (see
page
133).
• To ensure that the output is not turned ON due to an earth fault of the control
output (OSSD 1, OSSD 2), ground the device on the 0V side (for PNP output)
or +24V side (for NPN output).
Maintenance
• When you need to replace parts, always use only genuine replacement parts
from the supplier. If you use substitute parts from another manufacturer, the
safety light curtain may fail to detect properly, which may result in death or
serious body injury.
• The device must be inspected periodically by an engineer with the required
knowledge.
• When you have adjusted or maintained the SF4C, test the device following
the procedure specified in the maintenance chapter (see page
switch the system back on.
1.2 Safety Instructions
Connecting Procedure and Pin Assignment" on page
97) before you
Others
• Clean this device with a clean cloth. Do not use thinner-based cleaners.
• Never modify this device. If you modify the SF4C, the safety light curtain may
fail to detect properly, which may result in death or serious injury.
• Do not use the safety light curtain to detect objects flying over the sensing
area.
• Do not use this device to detect transparent objects, translucent objects or
objects smaller than the specified minimum sensing size.
5
Introduction
SF4C Safety light curtain
1.3 Applicable Standards and Regulations
This device complies with the following standards and regulations.
• EU Machinery Directive 98/37/EC, EU Machinery Directive 2006/42/EC, EMC Directive
2004/108/EC
• EN 61496-1 (Type 4), EN 55011
• IEC 61496-1/2 (Type 4), ISO 13849-1:2006 (Category 4, PLe), IEC 61508-1 to 7 (SIL3)
• JIS B 9704-1/2 (Type 4), JIS B 9705-1 (ISO 13849-1) (Category 4), JIS C 0508-1 to 7
(SIL3)
• UL 61496-1/2 (Type 4), UL 508, UL 1998 (Class 2), CSA 61496-1 / 2 (Type 4), CSA
C22.2 No.14
• OSHA 1910.212, OSHA 19 10.217(C), ANSI B11.1 to B11.19, ANSI/RIA 15.06
NOTE
• Conformity to JIS, OSHA and ANSI for this device has been evaluated by us.
•
directive. The CE-mark indicates that this product conforms to the EMC
directive.
•
•
Canadian and U.S. requirements.
• If you want to use this device in a location other than already described (see
page
regulations applicable in your region or country.
: This device conforms to the EMC directive and the Machinery
: This device is certified by TÜV Süd.
: The C-CL US Listing Mark indicates compliance with both
3), confirm first that the intended use complies with the standards or
6
Chapter 2
Before Using this Device
Before Using this Device
2.1 Confirmation of Packed Contents
Check mark Number Package content
SF4C Safety light curtain
□ 1 piece
□ 1 piece
□ 1 piece
Sensor with 1 emitter and 1 receiver
Test rod
Instruction manual (this manual)
8
SF4C Safety light curtain
2.2 Features
This device is the light curtain with the following features.
No special controller is required.
• Cable type or pigtailed type is available.
• The control output (OSSD 1/2) is a PNP / NPN output switching type.
• Large multi-purpose indicators (red, green) which are bright and easy-to-see are
incorporated.
2.2 Features
• Each function can be set by using the handy controller SFC-HC (optional), see page
• For details of options, see "
Options" on page 117.
84.
9
Before Using this Device
2.3 Part Description
Standard mounting
bracket MS-SFC-1
(Accessory)
Emitter
Model
information
Display section
Beam-channel
Large
multi-purpose
indicator
SF4C Safety light curtain
Receiver
Model
information
Large multi
-purpose
indicator
Gray cable
(with black line)
Gray cable
Parts of the safety light curtain
Part Description
Emitter
Receiver
Beam channel
Standard mounting
bracket MS-SFC-1
(accessory)
NOTE
Emits light to the receiver facing it. Furthermore, the status of the emitter is
indicated on its display section.
Receives light from the emitter facing it. Simultaneously the control output
(OSSD 1, OSSD 2) turns ON when the all beam channels receive light from
the emitter, and the control output (OSSD 1, OSSD 2) turns OFF when one
or more beam channels are blocked. (Except when using the muting
function, see note).
The light-emitting elements of the emitter and the light-receiving elements of
the receiver are placed at the intervals of 20mm.
Use these brackets to mount both the emitter and receiver.
• In case of using the muting function, muting sensors and a muting lamp are
required. Please purchase these items separately.
10
SF4C Safety light curtain
• The blanking function is set with the handy controller SFC-HC (optional), see
84. Please purchase the handy controller separately.
page
2.3.1 How the Display Works
Front view Side view (left and right)
Position of beam-axis alignment
indicators
A
2.3 Part Description
Location of
beam-axis
alignment
indicators
B
C
Large
D
multipurpose
indicator
The description given in [ ] is marked on the sensor.
Emitter
Function Description
Large
multi-purpose
indicator
(Note 1)
Incident light
intensity
indicator
(green/orange)
[STB]
Beam-axis
alignment
indicator
(green/red)
[RECEPTION]
Lights up in red when the large multi-purpose indicator input is ON.
Lights up in green when the large multi-purpose indicator input is ON.
There is no color display, when the input is OFF. With the optional handy controller you have
further setting possibilities, see "
Lights up in green when stable light is received.
Lights up in orange when unstable light is received.
Turns OFF when light is blocked. (Note 2)
A
B
C
When the control output (OSSD 1/2) is ON: lights up green.
When the top block receives light: lights up red.
When the top end receives light: blinks red.
When the control output (OSSD 1/2) is ON: lights up green.
When the upper middle block receives light: lights up red.
When the control output (OSSD 1/2) is ON: lights up green.
When the lower middle block receives light: lights up red.
Operation of Large Multi-Purpose Indicator" on page 14.
Large
multipurpose
indicator
D
When the control output (OSSD 1/2) is ON: lights up green.
When the bottom block receives light: lights up red.
When the bottom end receives light: blinks red.
11
Before Using this Device
Emitter
Function Description
Operation
indicator
[OSSD]
(green/red),
(Note 3)
Digital error
indicator (red)
Fault indicator
[FAULT]
(yellow)
PNP indicator
[PNP] (orange)
NPN indicator
[NPN] (orange)
Test input
indicator [TEST]
(orange)
Safety input 1
indicator [S1]
(orange)
Safety input 2
indicator [S2]
(orange)
Lights up when the sensor operation is as follows (OSSD 1/2):
When the control output (OSSD 1/2) is ON: lights up green.
When the control output (OSSD 1/2) is OFF: lights up red.
When the safety light curtain is in the lockout state, the error contents are
displayed here.
When a fault occurs in the sensor: lights up or blinks.
When the PNP output is set: lights up
When the NPN output is set: lights up
Lights up when test input is active.
Turns OFF when test input is inactive.
Lights up when safety input 1 is active.
Turns OFF when safety input 1 is inactive.
Lights up when the safety input 2 is active.
Turns OFF when the safety input 2 is inactive.
The description given in [ ] is marked on the sensor.
Receiver
Function Description
Large
multi-purpose
indicator
(Note 1)
Lights up in red when the large multi-purpose indicator input is active.
Lights up in green when the large multi-purpose indicator input is active.
Turns OFF when the input is inactive.
SF4C Safety light curtain
Incident light
intensity
indicator (green
/orange) [STB]
Beam-axis
alignment
indicator
(green/red)
[RECEPTION]
12
Lights up in green when stable light is received.
Lights up in orange when unstable light is received.
Turns OFF when light is blocked. (Note 2)
A
B
C
When the control output (OSSD 1/2) is ON: lights up green.
When the top block receives light: lights up red.
When the top end receives light: blinks red.
When the control output (OSSD 1/2) is ON: lights up green.
When the upper middle block receives light: lights up red.
When the control output (OSSD 1/2) is ON: lights up green.
When the lower middle block receives light: lights up red.
SF4C Safety light curtain
Receiver
Function Description
OSSD indicator
[OSSD]
(green/red),
(Note 3)
D
When the control output (OSSD 1/2) is ON: lights up green.
When the bottom block receives light: lights up red.
When the bottom end receives light: blinks red.
Lights up when the sensor operation is as follows (OSSD 1/2):
When the control output (OSSD 1/2) is ON: lights up green.
When the control output (OSSD 1/2) is OFF: lights up red.
2.3 Part Description
Fault indicator
[FAULT]
(yellow)
Digital error
indicator (red)
PNP indicator
[PNP] (orange)
NPN indicator
[NPN] (orange)
Function setting
indicator
(orange)
[FUNCTION]
Interlock
indicator
[INTERLOCK]
(yellow)
Muting input 1
(orange) [MU1]
Muting input 2
indicator
(orange) [MU2]
NOTE
When a fault occurs in the sensor: lights up or blinks.
When the safety light curtain is in the lockout state, the error contents are
displayed here.
When the PNP output is set: lights up
When the NPN output is set: lights up
Blinks when the handy controller is connected.
Lights up when blanking function is active. (Note 4)
Lights up when interlock is active.
Turns OFF, when interlock is inactive.
Lights up when the muting input 1 is active.
Turns off when the muting input 1 is inactive.
Lights up when the muting input 2 is active.
Turns off when the muting input 2 is inactive.
The operation of the large multi-purpose indicator (lights up, blinks or turns OFF) can be set by
using the handy controller SFC-HC (optional), see page
84.
The status "when light is blocked" refers to the status when there is an obstacle in the sensing
area.
Since the color of the operation indicator changes according to whether the control output
(OSSD 1/2) is ON or OFF, the operation indicator on the sensor is marked "OSSD".
The blanking function is set by using the handy controller SFC-HC (optional), see page
84.
The threshold where the control output (OSSD 1/2) changes from OFF to ON is applied as
"100% incident light intensity".
13
Before Using this Device
SF4C Safety light curtain
2.3.2 Operation of Large Multi-Purpose Indicator
You have different settings available for the large multi-purpose indicator with the handy
controller SFC-HC (optional), see page
mode numbers. Factory setting is mode 0.
Mode
0
1
2
3
4
5
6
7
Large multi-purpose indicator input
1/2
PNP
output:
ON
Lights up red Lights up green –- –- –- –Blinks red Blinks green –- –- –- –Lights up red Blinks green –- –- –- –Blinks red Lights up green –- –- –- –Lights up red Blinks red –- –- –- –Blinks green Lights up green –- –- –- ––- –- Lights up
Lights up red Blinks red –- –- Lights up
NPN
output:
OFF
PNP
output:
OFF
84. One mode can be selected from the following eight
PNP
output:
ON
OSSD 1/2
Muting
function
ON OFF Active Inactive
green
Lights
up red
Blinks green –-
green
Override
function
Blinks green
REFERENCE
Further information regarding the functionality of the handy controller you find
in the operation manual for the handy controller or see page
84.
14
SF4C Safety light curtain
2.4 Protection Area
2.4.1 Sensing Area
DANGER!
2.4 Protection Area
!
operator must pass through the sensing area of this device to reach
the dangerous parts of the machine.
Furthermore, ensure that some part of the operator's body always
remains in the sensing area while the operator works on the
dangerous parts of the machine.
Do not use any arrangement using reflection or recursive reflection.
Follow the below descriptions carefully. Failure to do so may result
Install a protective structure around the machine so that the
in serious injury or death.
The sensing area is the zone formed by the sensing height of the sensor and the sensing range
between the emitter and the receiver. The sensing height is determined by the number of beam
channels.
The sensing range depends on the device type: 0.1 to 3m. Also remember that if the sensing
range is less than 0.1m, malfunction may occur due to the optical structure.
Sensing height, sensing range, and sensing area
To p
Sensing height
The sensing height is the
area between the line
indicated in the top part
and line indicated in the
bottom part.
Emitter Receiver
Bottom
Sensing
height
Sensing area
Sensing range
When connecting the sensor, use the correct combination of emitter and receiver (same beam
pitch and number of beam channels) and match their top-bottom orientation. Combining
different types of emitters and receivers may produce a non-sensing area.
15
Before Using this Device
SF4C Safety light curtain
Do not arrange several receivers facing one emitter, or vice versa, as this could produce a
non-sensing area or cause mutual interference.
EXAMPLE
Correct installation
Dangerous
part
Sensing
area
Incorrect installation
Dangerous
part
2.4.2 Safety Distance
Dangerous
Sensing area
Protective structure
part
Sensing area
Dangerous
Sensing area
part
DANGER!
!
The safety distance is the minimum distance that must be maintained between the light curtain
and the dangerous parts of the machine so that the machine can be stopped before a human
body or an object can reach the dangerous parts.
The safety distance is calculated based on the equation described on the next page when a
person moves (normal intrusion) at a straight angle into the sensing area of the sensor.
16
Calculate the safety distance correctly and always maintain a
distance equal to or greater than the safety distance between the
sensing area of this device and the dangerous parts of the machine.
If the safety distance is miscalculated or not sufficient, the machine
will not stop quickly enough when a human body or an object
reaches the dangerous parts, which may result in serious injury or
death.
SF4C Safety light curtain
2.4 Protection Area
In case the intrusion direction is not perpendicular to the sensing area, be sure to refer to the
relevant standard for details of the calculation (regional standard, specification of the machine
etc.)
Safety distance S
Sensing area
Dangerous part
Intrusion direction
Safety distance
DANGER!
!
region where this device is to be used and then install this device.
Furthermore, the equation described on the next pages is to be
used only when the intrusion direction is perpendicular to the
sensing area, i.e. at a straight angle. If the intrusion direction is not
perpendicular to the sensing area, refer to the relevant standard
(regional standard, specification of the machine, etc.) for details of
the calculation.
The max. response time of the machine is from the point when the
machine receives the halt signal from this device to the point when
the dangerous part of the machine stops. The max. response time of
the machine should be timed with the actual machine.
The minimum size of the objects to be detected by the safety light curtain varies depending on
Before designing the system, refer to the relevant standards of the
whether the floating blanking function is used or not, see page
84. The equation differs
depending on the case whether the minimum object to be sensed is larger than ∅40mm or not.
Calculate the safety distance with the correct minimum size and the appropriate equation.
Number of beam
channels
Minimum object to
be sensed
Floating blanking
not active
∅25mm ∅45mm ∅65mm ∅85mm
Floating blanking active at (Note)
1 beam channel 2 beam channels 3 beam channels
17
Before Using this Device
NOTE
SF4C Safety light curtain
For details of the floating blanking function, see page 84.
2.4.2.1 Calculation Example for Europe
The equation for the safety distance S is calculated in accordance with EN 999 and ISO 13855.
Formula in case that the minimum sensing object is Ø40mm or less:
S: Safety distance (mm)
K: Intrusion velocity of operator's body or object (mm/s). The equation assumes an
S = K x T + C
Minimum distance required between the sensing area surface and the dangerous
parts of the machine.
intrusion direction perpendicular to the sensing area.
T:
C:
1.
2.
Response time of total equipment (s). T = T
: Maximum halt time of device (s). For determining Tm, refer to the
T
m
m
+ T
SF4C
machine documentation or take a measurement using a special device
called a 'brake monitor'.
: Response time of this device (s)
T
SF4C
Additional distance calculated from the minimum size of the object to be detected by
the sensor (mm). C has to be 0 or more. C = 8 x (d - 14)
d: Minimum object diameter (mm)
3.
Procedure
1. Calculate the safety distance S with a velocity K = 2,000mm/s
There are 3 possibilities (1-3):
1. S < 100mm Use 100mm as the safety distance.
2.100 ≤ S ≤ 500mm
3. S > 500mm Continue with the next step in the procedure
Use the calculated result as the safety
distance.
2. Recalculate S with K' = 1,600mm/s
There are 2 possibilities (4-5):
18
4. S > 500mm Use the calculated result as the safety distance.
5. S ≤ 500mm
Use 500mm as the safety distance.
SF4C Safety light curtain
When this device is used in the 'PSDI Mode', an appropriate safety distance S must be
calculated. For details, be sure to refer to the standards or regulations applicable in each region
or country.
EXAMPLE
Calculate the safety distance with the following values:
K: 2,000 mm/s
: 0.1s
T
m
: 0,7ms
T
SF4C
d: 25mm
With these values, the calculation is as follows:
S = K x T + C
2.4 Protection Area
= 2,000 x (0.1 + 0.007) + 8 x (25 - 14)
= 302
As 302 matches possibility 2 listed above, 302mm is the safety distance.
EXAMPLE
Calculate the safety distance with the following values:
K: 2,000mm/s
: 0.4s
T
m
: 7ms
T
SF4C
d: 25mm
With these values, the calculation is as follows:
S = K x T + C
= K x (T
= K x (T
= 2,000 x (0.4 + 0.007) + 8 x (25 -
m
+ T
m
+ T
) + 8 x (d - 14)
SF4C
) + 8 x (d - 14)
SF4C
14)
As 902 matches possibility 3 listed above, recalculate the safety distance with K' =
1,600mm/s.
S = K' x T + C
= 902
= K x (T
m
+ T
) + 8 x (d - 14)
SF4C
19
Before Using this Device
SF4C Safety light curtain
= 1,600 x (0.4 + 0.007) + 8 x (25 - 14)
= 739.2
As 739.2 is > 500mm, use this recalculated result as the safety distance.
Formula in case that the minimum sensing object is Ø40mm or more:
S = K x T + C
S: Safety distance (mm)
Minimum distance required between the sensing area surface and the dangerous
parts of the machine.
K: Intrusion velocity of operator's body or object (mm/s). The equation assumes an
intrusion direction perpendicular to the sensing area.
T:
Response time of total equipment (s). T = T
:
T
m
Maximum halt time of device (s). For determining T
+ T
m
SF4C
, refer to the
m
machine documentation or take a measurement using a special device
called a 'brake monitor'.
: Response time of this device (s)
T
SF4C
C: Additional distance calculated from the minimum size of the object to be detected by
the sensor (mm). C = 850 mm (Constant)
2.4.2.2 Calculation Example for US
he equation safety distance S is calculated in accordance with ANSI/RIA B15.06 with the
formula:
S = K x (T
S:
K:
Tbm
+ Tc + T
s
+ Tbm) + Dpf
SF4C
Safety distance (mm)
Minimum distance required between the sensing area surface and the dangerous
parts of the machine.
Intrusion velocity of operator's body or object. The recommended value in OSHA is
63inch/s ≈ 1,600mm/s.
ANSI/RIA B15.06 does not define the intrusion velocity 'K'. When determining K,
consider possible factors including the physical ability of operators.
Additional halting time tolerance for the brake monitor (s)
= Ta - (Ts + Tc)
T
bm
: Setting time of brake monitor (s)
T
a
When the machine is not equipped with a brake monitor, it is
recommended that 20% or more of (T
+ Tc) is taken as additional halt
s
time.
Ts: Halt time calculated from the operation time of the control element (air
20
SF4C Safety light curtain
2.4 Protection Area
T
SF4C
Dpf
valve, etc.) (s)
T
: Maximum response time of the control circuit required for the brake (s)
c
Response time of this device (s)
Additional distance calculated from the minimum size of the object to be detected by
the safety light curtain (mm) with the formula:
D
= 61.2mm
pf
NOTE
Since the calculation above is performed by taking 1 inch = 25.4mm, there is a
slight difference between the representation in mm and that in inches. Refer to
the relevant standard for details.
EXAMPLE
Calculate the safety distance with the following values:
7s
T
SF4C
d: 0.985ich ≈ 20mm
With these values, the calculation is as follows:
S = K x (T
= 63 x (T
= 63 x (T
= 63 x T
= 63 x T
≈ 63 x T
+ Tc + T
s
+ 0.014) + 3.4 x (d - 0.276)inch
a
+ 0.014) + 3.4 x (0.985 - 0.276)
a
63 x 0.007 + 3.4 x 0.709
a
+ 0,441 + 2.4106
a
2.85inch
a
+ Tbm) + Dpf
SF4C
In case this device is installed in a system with a maximum halt time 0.1 (s)
S = 63 x T
= 63 x 0.1 + 2.85
= 9.15inch ≈ 232.41mm
+ 2.85
a
Hence, as per the calculations Ds is 9.15inch ≈ 232.41mm.
21
Before Using this Device
NOTE
Since the calculation above is performed by taking 1inch = 25.4mm, there is a
slight difference between the representation in mm and that in inches. Refer to
the relevant standard for details.
2.4.3 Influence of Reflective Surface
DANGER!
SF4C Safety light curtain
!
surfaces, make sure to install this device so that reflected light
from the reflective surfaces does not affect the receiver.
Alternatively, take countermeasures such as painting, masking,
roughening, or changing the material of the reflective surfaces,
etc. Failure to do so may cause the sensor not to detect properly,
If the device is installed in a place where there are reflective
which may result in death or serious injury.
Install this device at a distance of at least 0,16m away from reflective surfaces such as metal
walls, floors, ceilings, workpieces, covers, panels or glass surfaces.
Side view Top view
Reflective surface
0.16m
Sensing range
0.1 - 3m
Receiver
Emitter
Reflective ceiling
0,16m
Sensing range
0,1 - 3m
0,16m
Reflective floor
Receiver
Emitter
2.4.4 Device Placement
If there is a problem with the wiring or when you need to evaluate the system before you add
further equipment, place two or more sets of emitters and receivers facing each other without
series or parallel connection between them. Perform an operation test (see page
22
56).
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