Panasonic ST4-A1-J02V, ST4-C11 User guide

safety BEAM SENSOR

ST4

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.

KEY POINTS

Summarizes key points in a concise manner.

SHORTCUTS

Provides helpful keyboard shortcuts.

EXPLANATION

Provides a brief explanation of a function, e.g. why or when you should use it.

next page

Indicates that the text will be continued on the next page.

Panasonic ST4 Instruction Manual	Table of Contents

Table of Contents

1. Introduction ............................................................................			1
1.1	Target Group .............................................................................................		2
1.2	Safety Instructions .....................................................................................		3
1.3	Applicable Standards/Regulations.............................................................		6
2. Before Using this Device .......................................................			7
2.1	Features.....................................................................................................		8
2.2	Part Description .........................................................................................		9
	2.2.1 Elements of the Controller ST4-C11 ........................................................		10
	2.2.2 Elements of the Multifunctional Controller ST4-C12EX ...........................		11
	2.2.3 Elements of the Sensor ST4-A.................................................................		14
2.3	Protection Area........................................................................................		15
	2.3.1	Sensing Range.........................................................................................	15
	2.3.2	Safety Distance ........................................................................................	16
	2.3.2.1 Calculation Example for Europe .....................................................		17
	2.3.2.2 Calculation Example for the US ......................................................		18
	2.3.3 Influence of Reflective Surfaces...............................................................		20
	2.3.4 Placement of Emitter and Receiver .........................................................		21
	2.3.5 Connecting Multiple Sensors Heads........................................................		23
	2.3.6 Address Allocations of the Sensor ST4-A□..............................................		25
2.4	Mounting and Removing..........................................................................		29
	2.4.1 Mounting and Removing the Controller ...................................................		29
	2.4.2 Mounting the Sensor ST4-A□...................................................................		30
	2.4.3 Connecting Controller and Sensor ST4-A□ .............................................		31
	2.4.4 Series Connection of the Sensor ST4-A□................................................		32

v

Table of Contents Panasonic ST4 Instruction Manual

2.5 Wiring	.......................................................................................................	36
2.5.1	Power Supply Unit ....................................................................................	36
2.5.2 .................................................................................	I/O Circuit Diagrams	37
2.5.2.1 ..........................................................Circuit of Controller ST4-C11		37
2.5.2.2 .............................Circuit of Multifunctional Controller ST4-C12EX		38
2.5.2.3 ............................................................Manual and automatic reset		39
2.5.2.4 ........................................................Emission Halt Input Terminals		40
2.5.3 ............................................................Connecting to the Terminal Block		41
2.5.4 ...............................................................	Terminal Arrangement Diagram	41

2.6	Adjustment and Operation........................................................................		44
	2.6.1	Beam-Axis Alignment ...............................................................................	44
	2.6.2	Operation Test..........................................................................................	46
	2.6.3	Operation..................................................................................................	47
3. Functions..............................................................................			49
3.1	Self-Diagnosis Function ...........................................................................		50
3.2	Reset Operation .......................................................................................		51
	3.2.1	Manual Reset ...........................................................................................	51
	3.2.2	Auto Reset................................................................................................	52
3.3	Emission Halt Function.............................................................................		53
3.4	Interference Prevention Function .............................................................		54
	3.4.1 Interference Prevention With One Controller ...........................................		54

3.4.2Interference Prevention Function When Using Two or More Controllers 54

3.5	Auxiliary Output ........................................................................................	56
	3.5.1 Auxiliary Output Operation of Controller ST4-C11...................................	56
	3.5.2 Auxiliary Output Operation of Controller ST4-C12EX ..............................	56
	3.5.3 Emission Amount Adjustment Function ...................................................	57
3.6	Muting Function (Only for ST4-C12EX)....................................................	59
	3.6.1 What Is a Muting Sensor..........................................................................	60
	3.6.2 Installation of the Muting Sensor..............................................................	60

vi

Panasonic ST4 Instruction Manual Table of Contents

	3.7	Override Function (Only ST4-C12EX) .....................................................		63
	3.8	Muting Pattern Selection Function (Only ST4-C12EX)............................		67
		3.8.1 Control Condition of Muting Pattern No. 1 ...............................................		68
		3.8.2 Control Condition of Muting Pattern No. 2 ...............................................		69
		3.8.3 Control Condition of Muting Pattern No. 3 ...............................................		70
	3.9	Sensor Diagnosis Function (Only ST4-C12EX).......................................		71
	3.10	Muting Lamp Diagnosis Function (Only ST4-C12EX) .............................		74
4.	Maintenance..........................................................................			75
	4.1	Daily Inspection .......................................................................................		76
	4.2	Periodic Inspection Checklist (Every Six Months) ...................................		77
	4.3	Inspection After Maintenance ..................................................................		78
5.	Troubleshooting ...................................................................			79
	5.1	Troubleshooting of Controller ST4-C11 ...................................................		80
	5.2	Troubleshooting of Controller ST4-C12EX ..............................................		83
	5.3	Troubleshooting of the Sensor ST4-A□...................................................		86
6.	Specifications .......................................................................			87
	6.1	Specifications, Controller ST4-C11..........................................................		88
	6.2	Specifications, Controller ST4-C12EX.....................................................		90
	6.3	Specifications, Sensor ST4-A□................................................................		92
	6.4	Options ....................................................................................................		93
		6.4.1	Extension Cable .......................................................................................	93
		6.4.2	Branch Cable............................................................................................	93
		6.4.3 Foot Angled Mounting Bracket.................................................................		93

vii

Table of Contents			Panasonic ST4 Instruction Manual
		6.4.4 Back Angled Mounting Bracket ................................................................		94
		6.4.5 Foot Biangled Protective Mounting Bracket.............................................		94
		6.4.6	Slit Masks .................................................................................................	94
7.	Dimensions...........................................................................			95
	7.1	Controller ST4-C11 ..................................................................................		96
	7.2	Multifunctional Controller ST4-C12EX......................................................		97
	7.3	Single-beam Sensor ST4-A□ ...................................................................		98
	7.4	Branch Cable ST4-CCJ05-WY.................................................................		99
	7.5	Foot Angled Mounting Bracket MS-CX-1 ...............................................		100
	7.6	Back Angled Mounting Bracket MS-ST4-3.............................................		101
	7.7	Foot Biangled Protective Mounting Bracket MS-ST4-6..........................		102
8.	Glossary of Terms..............................................................			103
9.	Index....................................................................................			105

viii

Chapter 1

Introduction

Introduction	Panasonic ST4 Instruction Manual

1.1 Target Group

Thank you for purchasing the PanasonicSafety Beam Sensor ST4 series (hereafter called 'this device'). 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.

This device is a safety beam sensor for protecting a person from dangerous parts of a machine which can cause injury or accident.

This manual has been written for the personnel who:

•have undergone suitable training and have knowledge of safety beam sensors as well as safety systems and standards.

•are responsible for this device

•design systems using this device

•install and connect this device

•manage and operate a plant using this device

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 this device 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

Panasonic ST4 Instruction Manual	1.2 Safety Instructions

1.2 Safety Instructions

DANGER!

!Please adhere to the following safety instructions when you install and operate this device. Failure to do so can result in fatal or critical injury during unprotected use of hazardous machinery.

•Use this device as per its specifications. Do not modify the safety beam sensor since its functions and capabilities may not be maintained and it may malfunction.

•The safety beam sensor has been developed/produced for industrial use only.

•Do not use the safety beam sensor 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 beam sensor 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 beam sensor 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 beam sensor by installing suitable protective equipment as a countermeasure for failure, damage, or malfunction of this device.

•Before using this sensor, check whether the device performs properly and has the functions and capabilities as stated in the design specifications.

•Dispose of the safety beam sensor as industrial waste.

Environment

•Do not use a mobile phone or a radio phone near this device.

•If the sensor 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.

•Do not install the safety beam sensor in the following environments:

3

Introduction	Panasonic ST4 Instruction Manual

-Areas exposed to intense interference light such as direct sunlight

-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 beam sensor 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 beam sensor to reach the dangerous parts of the machine.

•Install the beam sensor 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 beam sensor at a location where it can be affected by wall reflection.

•When installing multiple sets of the safety beam sensor, 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 beam sensor is used in the PSDI 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 safety beam sensor as safety equipment for a press machine.

•Do not install the safety beam sensor with a machine whose operation cannot be stopped immediately in the middle of an operation cycle by an emergency stop.

•This sensor 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 beam sensor.

4

Panasonic ST4 Instruction Manual	1.2 Safety Instructions

•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.

•In case you need to extend the cable of the ST4-A□, you can use the dedicated extension cable. The cable can be extended up to 50m (emitter and receiver, respectively).

•Do not control the device at only one control output (OSSD 1, OSSD 2).

•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 sensor 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 device, test the device following the procedure specified in the maintenance chapter 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 device, the sensor may fail to detect properly, which may result in death or serious injury.

•Do not use this device 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	Panasonic ST4 Instruction Manual

1.3 Applicable Standards/Regulations

This device complies with the following standards and regulations.

•EU Machinery Directive 98/37/EC, EMC Directive 2004/108/EC

•EN 61496-1 (Type 4), EN 55011, EN 50178,

EN ISO 13849 (Category 4, PLe), EN 61508-1 to 7 (SIL3)

•IEC 61496-1/2 (Type 4), ISO 13849-1 (Category 4, PLe), IEC 61508-1 to 7 (SIL3), IEC 62061 (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 1998, CSA C22.2 No.14, CSA C22.2 No.0.8

•OSHA 1910.212, OSHA 19 10.217(C), ANSI B11.1 to B11.19, ANSI/RIA 15.06, ANSI/ISA S84.01 (SIL3)

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	Panasonic ST4 Instruction Manual

2.1 Features

This device is a safety beam sensor with the following features.

•The controller ST4-C11 or the multifunctional controller ST4-C12EX is used in combination with the single-beam sensor ST4-A□.

•The type ST4-A□V comes with an emission amount adjuster to reduce the emission amount.

•Up to six units of the ST4-A□ can be connected per controller. The controller has an automatic interference prevention function.

•Wiring can be easily done by using the extension cable ST4-CCJ□ (optional) and the branch cable ST4-CCJ05-WY (optional), since the cables are connector types.

•The control output (OSSD 1/2) is a PNP/NPN output switching type. The output type can be switched with the output polarity selection switch on the controller.

•Replacing the relay is not necessary since a semiconductor output is used.

•The muting function complying with ISO 12643 (safety requirements for graphic technology equipment and systems) is available on the ST4-C12EX. For details, refer to the Muting Function (see page 59).

8

Panasonic ST4 Instruction Manual	2.2 Part Description

2.2 Part Description

The ST4 system can be built up from the following parts. Which controller type you choose depends on your requirements and applications.

Part name

Part

Controller ST4-C11

Multifunctional Controller

ST4-C12EX

Emitter	Receiver

Emitter ST4-A and

Receiver ST4-A

Back angled mounting bracket (optional)

Foot angled mounting bracket (optional)

Foot biangled protective mounting bracket (optional)

Extension cable ST4-CCJ

9

	Before Using this Device		Panasonic ST4 Instruction Manual
	Part name	Part
	(optional)
	Branch cable
	ST4-CCJ-WY (optional)
	Slit mask (optional)

2.2.1 Elements of the Controller ST4-C11

3

9

2

1

4 5 6 7 8

	Identifier	Function
1	Emitter connector	Connects the emitter of the ST4-A□.
2	Receiver connector	Connects the receiver of the ST4-A□.
3	Output polarity selection switch	Switches the control output to PNP output or NPN output.
4	Power indicator (Green)	Lights up while power is ON.
5	Control output indicator (Green)	Lights up while the control output (OSSD 1/2) is ON.
6	Interlock indicator (Yellow)	Lights up while the interlock is ON.
		Turns OFF when an error occurs or the control output (OSSD
		1/2) is ON.
7	Emission halt indicator (Orange)	Lights up while the emission halt function is valid.
8	Fault indicator	Lights up or blinks when an error occurs.
		For details, refer to "Troubleshooting (see page 79)".
9	Terminal block	See the following table.

Terminal block

	Terminal name	Description
	IL+	Interference prevention terminals (downstream)
		For details, refer to "Interference Prevention Function see "Interference Prevention
	IL-
		Function" on page 54".
	IU+	Interference prevention terminals (upstream)
	IU-	For details, refer to Interference Prevention Function see "Interference Prevention
		Function" on page 54.

10

	Panasonic ST4 Instruction Manual		2.2 Part Description
	Terminal name	Description
	X1	Reset input terminals (When X1 and X2 are connected: manual reset, and when X1 and
	X2
		X3 are connected: auto reset)
	X3
	T1	Emission halt input terminals
	T2
		(Open: emission halt, Short-circuit: emission)
	AUX
	OSSD 1
		Control output (OSSD 1/2)
	OSSD 2
	A1
	A2	0V

2.2.2 Elements of the Multifunctional Controller ST4-C12EX

w	y
q	t

}r

{e

2

	1
		3	u
		4
			9
			0
		5	8
		6	7
		Identifier	Function
	1	Emitter connector	Connects the emitter of the ST4-A□.
	2	Receiver connector	Connects the receiver of the ST4-A□.
	3	Power indicator (Green)	Lights up while power is ON.
	4	Fault display (Red)	7-segment lights up when an error occurs.
			For details, refer to Troubleshooting (see page 79).
	5	Interlock indicator (Yellow)	Lights up while the interlock is ON.
			Turns OFF when an error occurs or the control output (OSSD 1/2) is ON.
	6	Emission halt indicator	Lights up while the emission halt function is valid.
		(Orange)
	7	Control output indicator	Lights up while the control output (OSSD 1/2) is ON.

11

Before Using this Device

Panasonic ST4 Instruction Manual

Identifier

Function

(Green)

8

Auxiliary output 1 indicator

Turns OFF while the muting function is valid.

(Orange)

Lights up while the muting function is invalid.

9

Auxiliary output 2 indicator

Turns OFF while the override function is valid.

(Orange)

Lights up while the override function is invalid.

10

Auxiliary output 3 indicator

Lights up when the muting lamp is in normal operation.

(Orange)

Turns OFF when the muting lamp is in error.

11

Muting input S-A indicator

Lights up when the sensor input connected to the muting input terminal

(Orange)

(S-A) is ON.

12

Muting input S-B indicator

Lights up when the sensor input connected to the muting input terminal

(Orange)

(S-B) is ON.

13

Muting input S-C indicator

Lights up when the sensor input connected to the muting input terminal

(Orange)

(S-C) is ON.

14

Muting input S-D indicator

Lights up when the sensor connected to the muting input terminal (S-D)

(Orange)

is input ON.

15

Muting input S-E indicator

Lights up when the sensor input connected to the muting input terminal

(Orange)

(S-E) is ON.

16

Muting input S-F indicator

Lights up when the sensor input connected to the muting input terminal

(Orange)

(S-F) is ON.

17

Output polarity selection

Switches the control output to PNP output or NPN output.

switch

18

DIP switches

ON

1

2

3

4

5

6

7

8

See the table "DIP switches".

19

Terminal block

See table "Terminal block".

DIP Switches

No.

Description

1 to 4

Sets the ST4-A□ into the muting state.

Sets effective time for muting/override (see page 59).

5

Checks the states "beam received" and "beam interrupted" of the connected ST4-A□, or a sensor

error (see "Sensor Diagnosis Function (Only ST4-C12EX)" on page 71).

6

Unused

7

8

Deactivates the muting lamp diagnosis function (see page 74).

12

Panasonic ST4 Instruction Manual		2.2 Part Description
Terminal block
Terminal Name	Description
S+	Muting input power supply (24V)
S-A	Muting input S-A (for PNP type)
S-B	Muting input S-B (for NPN type)
S-	Muting input power supply (0V)
S+	Muting input power supply (24V)
S-C	Muting input S-C (for PNP type)
S-D	Muting input S-D (for NPN type)
S-	Muting input power supply (0V)
S+	Muting input power supply (24V)
S-E	Muting input S-E (for PNP type)
S-F	Muting input S-F (for NPN type)
S-	Muting input power supply (0V)
AUX1	Auxiliary output 1 (muting function)
AUX2	Auxiliary output 2 (override function)
AUX3	Auxiliary output 3 (lamp shutoff)
AUX4	Negative logic of the control output (OSSD 1/2)
OSSD 1	Control output (OSSD 1/2)
OSSD 2
L1
L2	Muting lamp connecting terminals
A
A2
IL+	Interference prevention terminals (downstream)
	For details, refer to Interference Prevention Function see "Interference Prevention
IL-
	Function" on page 54.
IU+	Interference prevention terminals (upstream)
	For details, refer to Interference Prevention Function see "Interference Prevention
IU-
	Function" on page 54.
O1	Override input terminals
O2
X1	Reset input terminals:
	When X1 and X2 are connected: manual reset
X2
	When X1 and X3 are connected: auto-reset
X3
T1	Emission halt input terminals (open: emission halt, short-circuit: emission)
T2

13

Before Using this Device	Panasonic ST4 Instruction Manual

2.2.3 Elements of the Sensor ST4-A

Emitter	Receiver
1	2

3

2

4

		Identifier	Function
		Beam	Lights up during beam emission of the sensor.
	1	emission
		indicator	Turns off during emission halt of the sensor.
		(Green)
		Beam	Lights up during beam interruption of the sensor.
	2	interruption	Lights up during lock out.
		indicator
			Turns off during beam reception of the sensor.
		(Red)
		Emission	Adjusts the emission amount.
	3	amount	For details, refer to Operation Test (see page 46) or Emission Amount Adjustment
		adjuster
			Function (see page 57).
		(Note 1)
		Stable
	4	incident	Lights up when incident beam intensity is over 150%. (Note 2)
		beam	Turns off when incident beam intensity is 150% or less. (Note 2)
		indicator
		(Green)

NOTE

1.Only available with the ST4-A□V type.

2.The incident beam intensity that turns the control output (OSSD 1/2) to ON is regarded as 100%.

14

Panasonic ST4 Instruction Manual	2.3 Protection Area

2.3 Protection Area

2.3.1 Sensing Range

DANGER!

!Be sure to install a protective structure around the machine so that the operator must pass through the sensing area of the single beam sensor to reach the dangerous parts of the machine. Failure to do so can result in death or serious injury.

Do not use any reflection type or recursive reflection type arrangement.

Installing multiple sets of this device produces a non-sensing area or causes mutual interference, which may result in death or serious injury.

This example shows what a protective structure could be, where the dangerous part of a machine should be situated and how the emitter and receiver can be arranged.

EXAMPLE

Installing four units of the ST4-A□

Protective structure

Receiver of the ST4-A□

Dangerous

part

300mm

300mm

300mm

300mm

Emitter of the ST4-A□

15

Before Using this Device	Panasonic ST4 Instruction Manual

Top view

From the top view the safety distance between the sensing area and the dangerous part is clearly visible.

Safety distance S (Ds)

Receiver of the

ST4-A□

Dangerous

part

Emitter of the

ST4-A□

2.3.2 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 if sufficient distance is not maintained, the machine will not stop quickly before reaching to the dangerous parts, which can result in death or serious injury.

The safety distance is the minimum distance that must be maintained between the ST4-A□ 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 (see page 17) when a person moves perpendicular to the sensing area of the area sensor.

CAUTION

•Before designing the system, refer to the relevant standards of the region where the single beam sensor is to be used.

•The equation should only be used when the intrusion direction is perpendicular to the sensing area. If the intrusion direction is not perpendicular to the sensing area, be sure to 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 machine actually used.

16

Panasonic ST4 Instruction Manual	2.3 Protection Area

2.3.2.1 Calculation Example for Europe

The minimum safety distance S is calculated in accordance with EN 999 and ISO 13855 with the following equation:

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. The recommended value is 1600 mm/s.

T:Response time of total equipment (s). T = Tm + TST4

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

TST4: Response time of the safety beam sensor (s).

C:Additional distance (mm).

Depending on the height of the beam axis EN 999 recommends different additional distances as shown in the following table.

	Number of beam		1		2		3	4
	axes
			750 mm		400mm		300mm	300mm
	Height of beam axis				900mm		700mm	600mm
	(e.g. height from the
	floor)						1100mm	900mm
								1200mm
	Additional distance		1200mm		850mm		850mm	850mm

EXAMPLE

Calculation of the safety distance (S) with the following values and four units of the ST4-A□ installed.

K: 1600mm/s

Tm: 0.1s

TST4: 0.025s

C: 850mm

17

Before Using this Device		Panasonic ST4 Instruction Manual
S	= K x T + C
	= 1600 × (Tm + TST4) + 850
	= 1600	× (0.1s + 0.025s) + 850
	= 1600	× 0.1s + 1600 × 0.025 + 850
	= 160 + 40 + 850
	= 1050

Hence, as per the calculations S is 1050mm.

2.3.2.2 Calculation Example for the US

The safety distance Ds is calculated in accordance with ANSI/RIA 15.06 with the equation:

Ds = K × T + Dpf

Ds:	Safety distance (mm)
	Minimum required distance 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 (≈ 1600mm/s).

ANSI/RIA 15.06 does not define the intrusion velocity "K." When determining K, consider possible factors including the physical ability of the operators.

T:

Dpf:

Response time of total equipment (s). T = Ts + Tc + TST4

Ts is the worst stopping time of the machine/equipment Tc is the worst stopping time of the control system

TST4 is the response time of the safeguarding device (25ms)

Additional distance calculated from the size of the minimum sensing object of the sensor (mm).

REFERENCE

Since the calculation is based on 1 inch = 25.4mm, there is a slight difference between the representation in mm and that in inches. Refer to the relevant standard for the details.

18

Panasonic ST4 Instruction Manual	2.3 Protection Area

Example calculation of the safety distance for a "REACH OVER" application

Topmost beam axis

35.434 inch (≈ 900mm) or more

11.812 inch (≈ 300mm) or less Undermost beam axis

The following default values of ANSI/RIA 15.06 are used for the example calculation:

Detectable minimum sensing object

Undermost beam axis: Topmost beam axis

T

Dpf

Min. 2.52inch (≈ 64mm) and max. 23.623inch (≈ 600mm)

11.812inch (≈ 300mm) or less 35.434inch (≈ 900mm) or more 0.5s

47.245inch (≈ 1200mm)

Ds = K × T + Dpf

=63 × T + 47.245

=63 × 0.5 + 47.245

=31.5 + 47.245

=78.745inch

=2000.123mm

≈ 2001mm

Hence Ds = 2001mm.

REFERENCE

Since the calculation is based on 1 inch = 25.4mm, there is a slight difference between the representation in mm and that in inches. Refer to the relevant standard for the details.

Example calculation of the safety distance for a "REACH THRU" application

Topmost beam axis

47.245 inch

(≈ 1200mm) or more

		Undermost
11.812 inch (≈ 300mm) or less		beam axis

The following default values of ANSI/RIA 15.06 are used for the example calculation:

19

Before Using this Device	Panasonic ST4 Instruction Manual

Detectable minimum sensing object Undermost beam axis

Topmost beam axis

T

Dpf

Min. 2.52inch (≈ 64mm) and max. 23.623inch (≈ 600mm) 11.812inch (≈ 300mm) or less

47.245inch (≈ 1200mm) or more 0.5s

35.434inch (≈ 900mm)

Ds = K × T + Dpf

=63 × T + 35.434

=63 × 0.5 + 35.434

=31.5 + 35.434

=66.934inch

=1700.1236mm

≈ 1701mm

Hence Ds = 1701mm.

REFERENCE

Since the calculation is based on 1 inch = 25.4mm, there is a slight difference between the representation in mm and that in inches. Refer to the relevant standard for the details.

2.3.3 Influence of Reflective Surfaces

DANGER!

!If a reflective surface exists where this device is to be installed, make sure to install this device so that reflected light from the reflective surface does not enter the receiver. Alternatively, take countermeasures such as painting, masking, roughening, or changing the material of the reflective surface, etc. Failure to do so may cause the device not to detect, resulting in serious injury or death.

20

Panasonic ST4 Instruction Manual	2.3 Protection Area

Install this device at a distance of at least A m (provided as follows) away from reflective surfaces such as metal walls, floors, ceilings, work pieces, covers, panels or glass surfaces.

	Side view		Top view
	Reflective ceiling		Reflective surface
Emitter	A	Receiver	A
	Sensing range	Emitter	∂°
	L		∂°
	A
			Sensing range L
	Reflective floor
Distance between emitter and receiver (sensing			Allowable installation distance A
range L)
0.1 to 3m			0.16m
3 to 15 m			L/2 x tan 2∂ = L x 0.053m (∂ = 3°)

NOTE

The effective aperture angle for this device is ±2.5° (when L > 3m) as required by IEC 61496-2/UL 61496-2. However, install this device away from reflective surfaces, taking into consideration an effective aperture angle of ±3° to account for beam misalignment during installation.

Allowable distance from sensor beam axis to reflective surface

		0.8
	<![if ! IE]> <![endif]>A (m)	0.6
	<![if ! IE]> <![endif]>distance
		Install in this area
	<![if ! IE]> <![endif]>installation	0.4
		Do not install in this area
	<![if ! IE]> <![endif]>Allowable
		0.2

0	5	10	15
	Distance between emitter and receiver L (m)

2.3.4 Placement of Emitter and Receiver

You can install a system in which multiple sets of controllers and their respective sensors face each other. Use this configuration if there is a problem in wiring or additional equipment has to be protected. If you arrange multiple sets, perform an operation test (see page 46).

21

Before Using this Device	Panasonic ST4 Instruction Manual

DANGER!

!Refer to the examples of device placement as follows and understand them thoroughly before installation. Improper placement could cause device malfunction, which can result in serious injury or death.

If this device is used in multiple sets, avoid mutual interference. If mutual interference occurs, it can result in serious injury or death.

EXAMPLE

Arrangement of the emitter and receiver back to back:

ST4-A□

ST4-A□

Receiver Emitter

Emitter Receiver

ST4-C11 or

ST4-C12EX

Arrangement of the emitter and receiver vertically on opposite sides:

ST4-A□

Emitter Receiver

Receiver	ST4-A□
	Emitter
	ST4-C11
	or
	ST4-C12EX

ST4-C11

or

ST4-C12EX

22