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: [e-mail].

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!

!The warning triangle indicates especially important safety instructions. If they are not adhered to, the results could be fatal or critical injury.

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.

1. 2. 3.

Procedure

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

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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
	3.8.1 Specification for the Muting Sensor .........................................................		76

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SF4C Safety light curtain			Table of Contents
		3.8.2 Installation of the Muting Sensor..............................................................	77
		3.8.3 Installation Only for the Exit of the Object................................................	79
	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

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Table of Contents				SF4C Safety light curtain
		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
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
		8.1.5	Mounting of the Protective Metal Case ..................................................		128

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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

1.2 Safety Instructions

DANGER!

!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 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.

•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	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.

Installation

•Always keep the correctly calculated safety distance between the safety light curtain and the dangerous parts of the machine.

•Install an extra protective structure around the machine so that the operator must pass through the sensing area of the safety light curtain to reach the dangerous parts of the machine.

•Install the safety light curtain in a manner that some part of the operator's body always remains in the sensing area until the operator has finished working with the dangerous parts of the machine.

•Do not install the safety light curtain at a location where it can be affected by 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 134) mode, an 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.

4

SF4C Safety light curtain	1.2 Safety Instructions

•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 "Connecting Procedure and Pin Assignment" on page 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 97) before you switch the system back on.

•Clean this device with a clean cloth. Do not use thinner-based cleaners.

Others

•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.

•: This device conforms to the EMC directive and the Machinery directive. The CE-mark indicates that this product conforms to the EMC directive.

•: This device is certified by TÜV Süd.

•: The C-CL US Listing Mark indicates compliance with both Canadian and U.S. requirements.

•If you want to use this device in a location other than already described (see page 3), confirm first that the intended use complies with the standards or regulations applicable in your region or country.

6

Chapter 2

Before Using this Device

Before Using this Device SF4C Safety light curtain

2.1 Confirmation of Packed Contents

Check mark	Number	Package content
□	1 piece	Sensor with 1 emitter and 1 receiver
□	1 piece	Test rod
□	1 piece	Instruction manual (this manual)

8

SF4C Safety light curtain	2.2 Features

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.

•Each function can be set by using the handy controller SFC-HC (optional), see page 84.

•For details of options, see "Options" on page 117.

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Before Using this Device	SF4C Safety light curtain

2.3 Part Description

Standard mounting bracket MS-SFC-1 (Accessory)

Emitter

Model information

Gray cable

Receiver

Display section

Model information

Beam-channel

	Large	Large multi
		-purpose
	multi-purpose
		indicator
	indicator
		Gray cable
		(with black line)

Parts of the safety light curtain

Part	Description
Emitter	Emits light to the receiver facing it. Furthermore, the status of the emitter is
	indicated on its display section.
Receiver	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).
Beam channel	The light-emitting elements of the emitter and the light-receiving elements of
	the receiver are placed at the intervals of 20mm.
Standard mounting	Use these brackets to mount both the emitter and receiver.
bracket MS-SFC-1
(accessory)

NOTE

•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	2.3 Part Description

•The blanking function is set with the handy controller SFC-HC (optional), see page 84. Please purchase the handy controller separately.

2.3.1How the Display Works

Front view

Side view (left and right)

Position of beam-axis alignment indicators

A

B

Location of beam-axis alignment

indicators

C

	Large
D	multi-	Large
	purpose
		multi-
	indicator
		purpose
		indicator

The description given in [ ] is marked on the sensor.

			Emitter
	Function		Description
	Large	Lights up in red when the large multi-purpose indicator input is ON.
	multi-purpose	Lights up in green when the large multi-purpose indicator input is ON.
	indicator
		There is no color display, when the input is OFF. With the optional handy controller you have
	(Note 1)
		further setting possibilities, see "Operation of Large Multi-Purpose Indicator" on page 14.
	Incident light		Lights up in green when stable light is received.
	intensity		Lights up in orange when unstable light is received.
	indicator
			Turns OFF when light is blocked. (Note 2)
	(green/orange)
	[STB]
		A	When the control output (OSSD 1/2) is ON: lights up green.
			When the top block receives light: lights up red.
	Beam-axis		When the top end receives light: blinks red.
	alignment
		B	When the control output (OSSD 1/2) is ON: lights up green.
	indicator
	(green/red)		When the upper middle block receives light: lights up red.
	[RECEPTION]
		C	When the control output (OSSD 1/2) is ON: lights up green.
			When the lower middle block receives light: lights up red.
		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			SF4C Safety light curtain
			Emitter
	Function		Description
	Operation		Lights up when the sensor operation is as follows (OSSD 1/2):
	indicator		When the control output (OSSD 1/2) is ON: lights up green.
	[OSSD]
			When the control output (OSSD 1/2) is OFF: lights up red.
	(green/red),
	(Note 3)
	Digital error		When the safety light curtain is in the lockout state, the error contents are
	indicator (red)		displayed here.
	Fault indicator		When a fault occurs in the sensor: lights up or blinks.
	[FAULT]
	(yellow)
	PNP indicator		When the PNP output is set: lights up
	[PNP] (orange)
	NPN indicator		When the NPN output is set: lights up
	[NPN] (orange)
	Test input		Lights up when test input is active.
	indicator [TEST]		Turns OFF when test input is inactive.
	(orange)
	Safety input 1		Lights up when safety input 1 is active.
	indicator [S1]		Turns OFF when safety input 1 is inactive.
	(orange)
	Safety input 2		Lights up when the safety input 2 is active.
	indicator [S2]		Turns OFF when the safety input 2 is inactive.
	(orange)

The description given in [ ] is marked on the sensor.

				Receiver
	Function			Description
	Large		Lights up in red when the large multi-purpose indicator input is active.
	multi-purpose		Lights up in green when the large multi-purpose indicator input is active.
	indicator
			Turns OFF when the input is inactive.
	(Note 1)
	Incident light			Lights up in green when stable light is received.
	intensity			Lights up in orange when unstable light is received.
	indicator (green
				Turns OFF when light is blocked. (Note 2)
	/orange) [STB]
			A	When the control output (OSSD 1/2) is ON: lights up green.
				When the top block receives light: lights up red.
	Beam-axis			When the top end receives light: blinks red.
	alignment
	indicator		B	When the control output (OSSD 1/2) is ON: lights up green.
	(green/red)
				When the upper middle block receives light: lights up red.
	[RECEPTION]
			C	When the control output (OSSD 1/2) is ON: lights up green.
				When the lower middle block receives light: lights up red.

12

SF4C Safety light curtain			2.3 Part Description
			Receiver
	Function		Description
		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.
	OSSD indicator		Lights up when the sensor operation is as follows (OSSD 1/2):
	[OSSD]		When the control output (OSSD 1/2) is ON: lights up green.
	(green/red),
			When the control output (OSSD 1/2) is OFF: lights up red.
	(Note 3)
	Fault indicator		When a fault occurs in the sensor: lights up or blinks.
	[FAULT]
	(yellow)
	Digital error		When the safety light curtain is in the lockout state, the error contents are
	indicator (red)		displayed here.
	PNP indicator		When the PNP output is set: lights up
	[PNP] (orange)
	NPN indicator		When the NPN output is set: lights up
	[NPN] (orange)
	Function setting		Blinks when the handy controller is connected.
	indicator		Lights up when blanking function is active. (Note 4)
	(orange)
	[FUNCTION]
	Interlock		Lights up when interlock is active.
	indicator		Turns OFF, when interlock is inactive.
	[INTERLOCK]
	(yellow)
	Muting input 1		Lights up when the muting input 1 is active.
	(orange) [MU1]		Turns off when the muting input 1 is inactive.
	Muting input 2		Lights up when the muting input 2 is active.
	indicator		Turns off when the muting input 2 is inactive.
	(orange) [MU2]

NOTE

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 84. One mode can be selected from the following eight mode numbers. Factory setting is mode 0.

Mode	Large multi-purpose indicator input						OSSD 1/2			Muting	Override
	1/2									function	function
	PNP		NPN	PNP		PNP	ON		OFF	Active	Inactive
	output:		output:	output:		output:
	ON		OFF	OFF		ON
0	Lights up red			Lights up green			–-		–-	–-	–-
1	Blinks red			Blinks green			–-		–-	–-	–-
2	Lights up red			Blinks green			–-		–-	–-	–-
3	Blinks red			Lights up green			–-		–-	–-	–-
4	Lights up red			Blinks red			–-		–-	–-	–-
5	Blinks green			Lights up green			–-		–-	–-	–-
6	–-			–-			Lights up		Lights	Blinks green	–-
							green		up red
7	Lights up red			Blinks red			–-		–-	Lights up	Blinks green
										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.

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SF4C Safety light curtain	2.4 Protection Area

2.4 Protection Area

2.4.1 Sensing Area

DANGER!

!Install a protective structure around the machine so that the 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 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

Top	The sensing height is the	Emitter	Receiver
	area between the line
	indicated in the top part
Sensing height	and line indicated in the
	bottom part.
		Sensing	Sensing area
		height

Bottom

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.

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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	Sensing	Protective structure
		area	Dangerous
	part
			part

Sensing area

Incorrect installation

	Sensing area
Dangerous	Sensing area
	Dangerous
part	part

2.4.2 Safety Distance

DANGER!

!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.

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.

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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!

!Before designing the system, refer to the relevant standards of the 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 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.

	Floating blanking	Floating blanking active at (Note)
	not active
Number of beam		1 beam channel	2 beam channels	3 beam channels
channels
Minimum object to	25mm	45mm	65mm	85mm
be sensed

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Before Using this Device	SF4C Safety light curtain

NOTE

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 = 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 = Tm + TSF4C

Tm: Maximum halt time of device (s). For determining Tm, refer to the machine documentation or take a measurement using a special device called a 'brake monitor'.

TSF4C: Response time of this device (s)

C: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)

1. 2. 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	Use the calculated result as the safety
	distance.
3. S > 500mm	Continue with the next step in the procedure

2.Recalculate S with K' = 1,600mm/s

There are 2 possibilities (4-5):

4. S > 500mm	Use the calculated result as the safety distance.
5. S ≤ 500mm	Use 500mm as the safety distance.

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SF4C Safety light curtain	2.4 Protection Area

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
Tm:	0.1s
TSF4C:	0,7ms
d:	25mm

With these values, the calculation is as follows:

S= K x T + C

=K x (Tm + TSF4C) + 8 x (d - 14)

=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

Tm: 0.4s

TSF4C: 7ms

d:25mm

With these values, the calculation is as follows:

S= K x T + C

=K x (Tm + TSF4C) + 8 x (d - 14)

=2,000 x (0.4 + 0.007) + 8 x (25 - 14)

=902

As 902 matches possibility 3 listed above, recalculate the safety distance with K' = 1,600mm/s.

S= K' x T + C

= K x (Tm + TSF4C) + 8 x (d - 14)

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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 = Tm + TSF4C

Tm:	Maximum halt time of device (s). For determining Tm, refer to the
	machine documentation or take a measurement using a special device
	called a 'brake monitor'.
TSF4C:	Response time of this device (s)

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 (Ts + Tc + TSF4C + Tbm) + Dpf

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. 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.

Tbm	Additional halting time tolerance for the brake monitor (s)
	Tbm = Ta - (Ts + Tc)
	Ta:	Setting time of brake monitor (s)
		When the machine is not equipped with a brake monitor, it is
		recommended that 20% or more of (Ts + Tc) is taken as additional halt
		time.
	Ts:	Halt time calculated from the operation time of the control element (air

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SF4C Safety light curtain	2.4 Protection Area

TSF4C

Dpf

valve, etc.) (s)

Tc: Maximum response time of the control circuit required for the brake (s) 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:

Dpf = 61.2mm

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:

TSF4C	7s
d:	0.985ich ≈ 20mm
With these values, the calculation is as follows:
S	= K x (Ts + Tc + TSF4C + Tbm) + Dpf
	= 63 x (Ta + 0.014)	+ 3.4 x (d - 0.276)inch
	= 63 x (Ta + 0.014)	+ 3.4 x (0.985 - 0.276)
	= 63 x Ta 63 x 0.007 + 3.4 x 0.709

= 63 x Ta + 0,441 + 2.4106

≈ 63 x Ta 2.85inch

In case this device is installed in a system with a maximum halt time 0.1 (s) S = 63 x Ta + 2.85

=63 x 0.1 + 2.85

=9.15inch ≈ 232.41mm

Hence, as per the calculations Ds is 9.15inch ≈ 232.41mm.

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Before Using this Device	SF4C Safety light curtain

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!

!If the device is installed in a place where there are reflective 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, 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 ceiling			Reflective surface
Emitter	0,16m	Receiver	Emitter	0.16m	Receiver

Sensing range

0,1 - 3m Sensing range

0.1 - 3m

0,16m

Reflective floor

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 56).

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