SICK deTem4 LT Muting A/P - Multiple light beam safety device Operating instructions

O P E R A T I N G I N S T R U C T I O N S

deTem4 LT Muting A/P

Multiple light beam safety device

Described product

deT

em4 LT Muting A/P

Manufacturer

SICK AG

Erwin-Sick-Str. 1

79183 Waldkirch

Germany

Legal information

T

his work is protected by copyright. Any rights derived from the copyright shall be

reserved for SICK AG. Reproduction of this document or parts of this document is only

permissible within the limits of the legal determination of Copyright Law. Any modifica‐

tion, abridgment or translation of this document is prohibited without the express writ‐

ten permission of SICK AG.

The trademarks stated in this document are the property of their respective owner.

Original document

T

his document is an original document of SICK AG.

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Contents

1 About this document........................................................................ 6

1.1 Function of this document....................................................................... 6

1.2 Scope......................................................................................................... 6

1.3 Target groups of these operating instructions........................................ 6

1.4 Additional information.............................................................................. 6

1.5 Symbols and document conventions...................................................... 7

2 Safety information............................................................................ 8

2.1 General safety notes................................................................................ 8

2.2 Intended use............................................................................................. 8

2.3 Improper use............................................................................................. 8

2.4 Requirements for the qualification of personnel.................................... 8

3 Product description........................................................................... 10

3.1 Setup and function................................................................................... 10

3.2 Product characteristics............................................................................ 11

3.2.1 Device overview....................................................................... 11

3.2.2 Beam coding............................................................................ 13

3.2.3 Alignment aid........................................................................... 13

3.2.4 Restart interlock...................................................................... 13

3.2.5 Application diagnostic output................................................. 13

3.2.6 Muting....................................................................................... 14

3.2.7 C1 muting release................................................................... 14

3.2.8 Near Field Communication (NFC)........................................... 14

3.2.9 Status indicators...................................................................... 15

3.3 Example applications............................................................................... 17

4 Project planning................................................................................ 18

4.1 Manufacturer of the machine.................................................................. 18

4.2 Operating entity of the machine.............................................................. 18

4.3 Design........................................................................................................ 19

4.3.1 Scanning range and beam separation................................... 19

4.3.2 Minimum distance from the hazardous point....................... 19

4.3.3 Minimum distance from reflective surfaces.......................... 21

4.3.4 Protection against interference from systems in close prox‐

imit

y to each other................................................................... 23

4.3.5 Muting....................................................................................... 25

4.4 Integration in the electrical control system............................................. 33

4.4.1 Restart interlock...................................................................... 35

4.4.2 External device monitoring (EDM).......................................... 36

4.4.3 Application diagnostic output................................................. 37

4.4.4 Muting lamp............................................................................. 37

4.4.5 Muting....................................................................................... 37

4.4.6 Connection diagrams.............................................................. 38

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4.5 Testing plan............................................................................................... 40

4.5.1 Test rod check.......................................................................... 41

4.5.2 Visual check of the machine and the protective device........ 42

5 Mounting............................................................................................. 44

5.1 Safety......................................................................................................... 44

5.2 Unpacking.................................................................................................. 44

5.3 Mounting the muting arms....................................................................... 45

5.4 Mounting................................................................................................... 48

5.4.1 Mounting the QuickFix bracket............................................... 50

5.4.2 Mounting the FlexFix bracket.................................................. 52

6 Electrical installation........................................................................ 55

6.1 Safety......................................................................................................... 55

6.2 System connection (M12, 8-pin)............................................................. 57

6.3 Reset/override pushbutton connection (M12, 5-pin)............................ 57

6.4 Muting sensor connection (M12, 5-pin).................................................. 58

7 Configuration..................................................................................... 59

7.1 Overview.................................................................................................... 59

7.2 Factory settings......................................................................................... 59

7.2.1 Set to factory settings............................................................. 59

7.3 Configuration mode.................................................................................. 60

7.4 Configuring beam coding......................................................................... 60

7.5 Configuring the C1 muting release.......................................................... 61

7.6 Configuring muting................................................................................... 61

7.7 Configuring the restart interlock.............................................................. 62

7.8 Configuring application diagnostic output.............................................. 63

8 Commissioning.................................................................................. 64

8.1 Safety......................................................................................................... 64

8.2 Overview.................................................................................................... 64

8.3 Switching on.............................................................................................. 65

8.4 Alignment of the active and passive units.............................................. 65

8.4.1 Aligning the active and passive units..................................... 66

8.4.2 Alignment with the QuickFix bracket...................................... 66

8.4.3 Alignment with the FlexFix bracket or with the replacement

br

acket...................................................................................... 67

8.4.4 Indication of the alignment quality......................................... 68

8.5 Check during commissioning and modifications.................................... 69

9 Operation............................................................................................ 70

9.1 Overview.................................................................................................... 70

9.2 Safety......................................................................................................... 70

9.3 Regular thorough check........................................................................... 71

9.4 LEDs........................................................................................................... 72

CONTENTS

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10 Maintenance...................................................................................... 75

10.1 Safety......................................................................................................... 75

10.2 Regular cleaning....................................................................................... 75

10.3 Regular thorough check........................................................................... 76

11 Troubleshooting................................................................................. 77

11.1 Overview.................................................................................................... 77

11.2 Safety......................................................................................................... 77

11.3 Diagnostic LEDs........................................................................................ 77

11.3.1 Indications when switching on................................................ 78

11.3.2 Status indicator........................................................................ 80

11.3.3 Fault indicators........................................................................ 83

12 Decommissioning............................................................................. 86

12.1 Disposal..................................................................................................... 86

13 Technical data.................................................................................... 87

13.1 Data sheet................................................................................................. 87

13.2 Length of cable......................................................................................... 90

13.3 Table of weights........................................................................................ 90

13.4 Dimensional drawings.............................................................................. 91

14 Ordering information........................................................................ 94

14.1 Scope of delivery....................................................................................... 94

14.2 Ordering information................................................................................. 94

15 Accessories........................................................................................ 96

15.1 Brackets.................................................................................................... 96

15.2 Mounting accessories.............................................................................. 97

15.3 Weld spark guard...................................................................................... 97

15.4 Connectivity............................................................................................... 98

15.5 Alignment aid............................................................................................ 99

15.6 Cleaning agent.......................................................................................... 100

15.7 Test rods.................................................................................................... 100

15.8 Muting accessories................................................................................... 100

16 Annex.................................................................................................. 102

16.1 Compliance with EU directives................................................................. 102

16.2 Note on specified standards.................................................................... 103

16.3 Checklist for initial commissioning and commissioning........................ 104

17 List of figures..................................................................................... 105

18 List of tables....................................................................................... 106

CONTENTS

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1 About this document

1.1 Function of this document

These operating instructions contain the information needed during the life cycle of the

mult

iple light beam safety device.

Operating instructions of the multiple light beam safety device must be made available

to all people who work with the device.

Please read these operating instructions carefully and make sure that you understand

the content fully before working with the multiple light beam safety device.

1.2 Scope

These operating instructions only apply to the deTem4 LT Muting A/P multiple light

be

am safety devices with the following type label entries in the “Operating Instructions”

field:

•

8024642

This document is included with the following SICK part numbers (this document in all

available language versions):

8024642

1.3 Target groups of these operating instructions

Some chapters of these operating instructions are intended for certain target groups.

Ho

wever, the entire operating instructions are relevant for intended use of the product.

Table 1: Target groups and selected chapters of these operating instructions

Target group Chapters of these operating instructions

Project developers (planners, developers,

de

signers)

"Project planning", page 18

"Configuration", page 59

"Technical data", page 87

"Accessories", page 96

Installers "Mounting", page 44

Electricians "Electrical installation", page 55

Safety experts (such as CE authorized repre‐

sent

atives, compliance officers, people who

test and approve the application)

"Project planning", page 18

"Configuration", page 59

"Commissioning", page 64

"Technical data", page 87

"Checklist for initial commissioning and com‐

missioning", page 104

Operators "Operation", page 70

"T

roubleshooting", page 77

Maintenance personnel "Maintenance", page 75

"T

roubleshooting", page 77

1.4 Additional information

www.sick.com

T

he following information is available on the Internet:

•

This document in other languages

•

Data sheets and application examples

•

CAD data and dimensional drawings

1 A

BOUT THIS DOCUMENT

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•

C

ertificates (e.g. EU declaration of conformity)

•

Guide for Safe Machinery Six steps to a safe machine

1.5 Symbols and document conventions

The following symbols and conventions are used in this document:

Safety notes and other notes

DANGER

Indic

ates a situation presenting imminent danger, which will lead to death or serious

injuries if not prevented.

WARNING

Indic

ates a situation presenting possible danger, which may lead to death or serious

injuries if not prevented.

CAUTION

Indic

ates a situation presenting possible danger, which may lead to moderate or minor

injuries if not prevented.

NOTICE

Indic

ates a situation presenting possible danger, which may lead to property damage if

not prevented.

NOTE

Indic

ates useful tips and recommendations.

Instructions to action

b

The arrow denotes instructions to action.

1. The sequence of instructions for action is numbered.

2. Follow the order in which the numbered instructions are given.

✓

The check mark denotes the result of an instruction.

LED symbols

These symbols indicate the status of an LED:

o

The LED is off.

Ö

The LED is flashing.

O

The LED is illuminated continuously.

Active and passive units

T

hese symbols indicate the active and passive unit of the device:

This symbol indicates the active unit.

This symbol indicates the passive unit.

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2 Safety information

2.1 General safety notes

DANGER

If t

he safety component is integrated incorrectly, the dangerous state may be ended to

late.

b

Plan the integration of the safety component in accordance with the machine

requirements, see "Project planning", page 18.

2.2 Intended use

The deTem4 LT Muting A/P multiple light beam safety device is an electro-sensitive pro‐

t

ective device (ESPE) and is suitable for the following applications:

•

Single-sided access protection

The deTem4 LT Muting A/P multiple light beam safety device must only be used within

t

he limits of the prescribed and specified technical data and operating conditions at all

times.

Any instance of improper use, incorrect modification, or manipulation of the deTem4 LT

Muting A/P multiple light beam safety device shall void any warranty provided by SICK

AG; furthermore, SICK AG shall not accept any responsibility or liability for any resulting

damage and consequential damage.

2.3 Improper use

The multiple light beam safety device works as an indirect protective measure and can‐

no

t provide protection from pieces thrown from application nor from emitted radiation.

Transparent objects are not detected.

Among others, the multiple light beam safety device is not suitable for the following

applications:

•

Outdoors

•

Underwater

•

In explosion-hazardous areas

•

At altitudes over 3,000 m above sea level

•

In environments with increased levels of ionizing radiation

2.4 Requirements for the qualification of personnel

The protective device must be configured, installed, connected, commissioned, and ser‐

v

iced by qualified safety personnel only.

Project planning

For project planning, a person is considered competent when he/she has expertise and

experience in the selection and use of protective devices on machines and is familiar

with the relevant technical rules and national work safety regulations.

Mechanical mounting, electrical installation, and commissioning

For the task, a person is considered qualified when he/she has the expertise and expe‐

rience in the relevant field and is sufficiently familiar with the application of the protec‐

tive device on the machine to be able to assess whether it is in an operationally safe

state.

2 S

AFETY INFORMATION

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Configuration

F

or configuration, a person is considered competent when he/she has the expertise

and experience in the relevant field and is sufficiently familiar with the application of

the protective device on the machine that he/she can assess its work safety aspects.

Operation and maintenance

For operation and maintenance, a person is considered competent when he/she has

the expertise and experience in the relevant field and is sufficiently familiar with the

application of the protective device on the machine and has been instructed by the

machine operator in its operation.

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3 Product description

3.1 Setup and function

Overview

T

he multiple light beam safety device deTem4 LT Muting A/P is an electro-sensitive pro‐

tective device (ESPE) consisting of a sender and receiver unit (hereinafter referred to as

the active unit) and a deflection unit (hereinafter referred to as the passive unit). The

sender and receiver unit is located in the same housing.

The hazardous area is protected by the infrared light beams between the active unit

and the passive unit on the opposite side. The infrared beams of the active unit hit the

passive unit and are sent back to the active unit with a parallel offset.

When one or more light beams are completely interrupted, the protective device reports

the interruption in the light path to the secure output signal switching devices (OSSDs)

by a signal change. The machine or its control must safely analyze the signals (for

example using a safe control or safety relays) and stop the dangerous state.

The deTem4 LT Muting A/P multiple light beam safety device is used for muting applica‐

tions, i.e. for temporarily bridging the electro-sensitive protective device. Muting arms

are mounted on the active and passive units for this purpose. Two muting sensors are

attached to each muting arm for the active unit, and two reflectors on each muting arm

for the passive unit. The muting sensors perform the task of distinguishing between

people and materials. This enables materials to be transported into or out of a haz‐

ardous area without interrupting the work process. Depending on the number of muting

arms and the muting sensors attached to them, it is possible to perform either exit

monitoring or entry/exit monitoring.

Figure 1: Active and passive units

3 P

RODUCT DESCRIPTION

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Beam separation and number of beams

T

he beam separation is the distance between two adjacent light beams, measured

from the center of one beam to the center of the next.

Scanning range

The scanning range is the maximum dimension of the light path between active and

passive units.

The scanning range is reduced by using a weld spark guard.

Further topics

•

"D

ata sheet", page 87

•

"Weld spark guard", page 97

3.2 Product characteristics

3.2.1 Device overview

§

!

"

$

&

/

%

Figure 2: Overview of the active unit

!

End cap with integrated LED

"

Active unit

§

Terminal compartment

$

Connection for muting signal A

%

Connection for muting signal B

&

Connection for reset/override pushbutton, e.g., ER12

/

System connection

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$

%

)

(

?

&

/

!

"

§

Figure 3: Active unit with mounted muting arms

!

End cap with integrated LED

"

Active unit

§

Terminal compartment

$

Connection for muting signal A

%

Connection for muting signal B

&

Connection for reset/override pushbutton, e.g., ER12

/

System connection

(

Muting arm A

)

Muting arm B

?

Muting sensors

3 PRODUCT DESCRIPTION

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!

Figure 4: Overview of the passive unit for short scanning ranges

!

Light guide deflection

3.2.2 Beam coding

Depending on its configuration, the multiple light beam safety device operates with 1 of

2 be

am codings: code 1 or code 2. In order to avoid mutual interference between 2

neighboring multiple light beam safety devices, one can be operated with code 1 and

the other with code 2.

3.2.3 Alignment aid

Diagnostic LEDs are installed in the active unit of the multiple light beam safety device.

For a simple alignment of the passive unit, diagnostic LEDs 1 … 8 indicate the align‐

ment quality once the device has been switched on.

The alignment quality of the beams close to the system connection are indicated via

the diagnostic LEDs 1 … 4. The alignment quality of the beams distant from the system

connection are indicated via the diagnostic LEDs 5 … 8.

3.2.4 Restart interlock

The multiple light beam safety device has an integrated restart interlock. The function

c

an be configured during commissioning.

A restart interlock prevents the machine from starting again once the protective device

has been triggered. First, the operator must press a reset pushbutton to return the pro‐

tective device to monitoring status. Then, in a second step, the operator can restart the

machine.

The reset pushbutton can be connected locally at the system connection or at the con‐

nection for the reset/override pushbutton.

3.2.5 Application diagnostic output

The multiple light beam safety device has an application diagnostic output at the sys‐

t

em connection and at the connection for a reset/override pushbutton.

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Depending on the configuration, the application diagnostic output signals a certain sta‐

t

us of the protective device, e.g. if the reset pushbutton must be engaged.

For a signal of the protective device to be displayed, a light can be connected to the

application diagnostic output or the signal can be transmitted to the machine con‐

troller.

The following signals can be output over the application diagnostic output:

•

R

eset required

•

Muting status

•

Override required

3.2.6 Muting

Muting according to IEC 62046 temporarily bypasses the protective action of the multi‐

ple li

ght beam safety device so that material can be transported to or from a machine

or system. As a result, the work process remains uninterrupted.

The function is configured during commissioning.

The distinction between people and materials is made by 2 signals that are indepen‐

dent of each other. Based on the logical evaluation of these signals, the protective

device is bypassed if a valid muting condition is present. As soon as something other

than material enters the hazardous area, the work process is interrupted.

3.2.7 C1 muting release

The protective device has an internal muting release. The C1 muting release function

c

an be configured during commissioning and is located at In4 of the system connec‐

tion.

The C1 muting release function is a supplementary signal from an external source that

is only used for muting release and is required for every muting cycle.

3.2.8 Near Field Communication (NFC)

Overview

T

he active unit of the multiple light beam safety device has an integrated NFC interface

for transmitting diagnostic data of the protective device to an NFC-capable device.

The integrated NFC interface is intended for temporary use.

Diagnostic data

T

he following diagnostic data can be displayed in an NFC-capable device:

•

Device information and device status, e.g. name, serial number, type code, status

of OSSDs, muting status or quality of alignment

•

Configuration of the device, e.g. whether the restart interlock is activated

•

Fault diagnosis with specification of the error code, error description, diagnostic

LED and troubleshooting

An NFC-capable antenna is integrated behind the front screen of the multiple light

beam safety device for transmitting the data. The area is marked with the NFC-symbol.

Figure 5: NFC symbol

1)

T

he N-Mark is a trademark or registered trademark of NFC Forum, Inc. in the United States and in other countries.

3 P

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Calling up diagnostic data

T

o be able to call up information, you need an NFC-capable device, e.g. a smartphone

and the SICK Safety Assistant app provided by SICK.

b

Hold the NFC-capable mobile device near the marked NFC-area on the lower end

of the active unit to call up the diagnostic data.

Complementary information

The diagnostic data can also be read out in the voltage-free state of the protective

device. However, you will receive more information if the protective device is supplied

with voltage.

3.2.9 Status indicators

Overview

T

he LEDs of the active unit signal the operational status of the multiple light beam

safety device.

$

§

1

2

3

4

5 6 7 8

!

OSSD

INFO

"

Figure 6: Status indicators of the active unit

Position LED color Display Labeling

!

Red/green OSSD status OSSD

"

Red/yellow/green Information display;

sho

ws the status of

the light path and

additional information

about the status dis‐

play

INFO

§

Blue/red/yellow/white Diagnostics 1, 2, 3, 4, 5, 6, 7, 8

$

Red/yellow/green End cap with inte‐

gr

ated LED

–

The integrated LED in the end cap of the active unit is responsible for the light behavior

of t

he INFO-LED.

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Further topics

•

"Dia

gnostic LEDs", page 77

3.2.9.1 Indication of diagnostic LEDs

Table 2: Colors and their meaning

Color Color Meaning

O

White Configuration status

O

Blue Alignment quality

O

Red Fault indication

O

Yellow Warning

o LED of

f. Ö LED flashes. O LED illuminates.

Table 3: Indication of the configuration status

Diagnostics LEDs Color Configuration

1

O W

hite

Reserved.

2

O W

hite

Reserved.

3

o

Beam coding 1 is configured.

O W

hite

Beam coding 2 is configured.

4

O W

hite

Restart interlock is configured.

5

O W

hite

Exit monitoring is configured if diagnostic LED

5 li

ghts up white and diagnostic LED 6 is off.

6

O W

hite

Entry/exit monitoring is configured if both diag‐

nos

tic LED 6 and diagnostic LED 5 light up

white.

7

O W

hite

C1 muting release is configured.

8

O W

hite

Reserved.

o LED of

f. Ö LED flashes. O LED illuminates.

Table 4: Indication of the alignment quality

Diagnostics LEDs Color Meaning

1 ... 4

O Blue

Display of alignment quality of the beams close

t

o the system connection.

If only one diagnostic LED lights up, the align‐

ment is insufficient. If all 4 diagnostic LEDs

light up, the alignment is excellent.

5 … 8

O Blue

Display of alignment quality of the beams dis‐

t

ant from the system connection.

If only one diagnostic LED lights up, the align‐

ment is insufficient. If all 4 diagnostic LEDs

light up, the alignment is excellent.

o LED of

f. Ö LED flashes. O LED illuminates.

Table 5: Fault indication

Diagnostics LEDs Color Meaning

1 ... 8

O R

ed

A red illuminated diagnostic LED signals the

f

unction at which an error has occurred.

1 ... 8

Ö R

ed

A red flashing diagnostic LED signals the rea‐

son f

or the error.

o LED of

f. Ö LED flashes. O LED illuminates.

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Table 6: Warnings

Diagnostics LED Color Meaning

1 ... 8

O Y

ellow

A yellow illuminated diagnostic LED signals

whic

h function is affected.

1 ... 8

Ö Y

ellow

A yellow flashing diagnostic LED signals the

r

eason for the warning.

o LED of

f. Ö LED flashes. O LED illuminates.

Example: If diagnostic LED 5 lights up yellow and diagnostic LED 3 flashes yellow, the

sensor g

ap monitoring was exceeded.

Further topics

•

"Diagnostic LEDs", page 77

3.3 Example applications

Figure 7: Access protection

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4 Project planning

4.1 Manufacturer of the machine

DANGER

H

azard due to lack of effectiveness of the protective device

Persons and parts of the body to be protected may not be recognized in case of non-

observance.

b

Use of the multiple light beam safety device requires a risk assessment. Check

whether additional protective measures are required.

b

Comply with the applicable national regulations derived from the application (e.g.,

work safety regulations, safety rules, or other relevant safety guidelines).

b

Do not combine the components of the multiple light beam safety device with

components from other multiple light beam safety devices.

b

Apart from the procedures described in this document, the components of the

multiple light beam safety device must not be opened.

b

The components of the multiple light beam safety device must not be tampered

with or changed.

b

Improper repair of the protective device can lead to a loss of the protective func‐

tion. Do not carry out any repairs on the device components.

4.2 Operating entity of the machine

DANGER

H

azard due to lack of effectiveness of the protective device

Persons and parts of the body to be protected may not be recognized in case of non-

observance.

b

Changes to the electrical integration of the multiple light beam safety device in the

machine control and changes to the mechanical mounting of the multiple light

beam safety device necessitate a new risk assessment. The results of this risk

assessment may require the operating entity of the machine to meet a manufac‐

turer’s obligations.

b

Apart from the procedures described in this document, the components of the

multiple light beam safety device must not be opened.

b

The components of the multiple light beam safety device must not be tampered

with or changed.

b

Improper repair of the protective device can lead to a loss of the protective func‐

tion. Do not carry out any repairs on the device components.

4 PROJECT PLANNING

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4.3 Design

Important information

DANGER

H

azard due to lack of effectiveness of the protective device

Persons and parts of the body to be protected may not be recognized in case of non-

observance.

b

Make sure that the following design requirements are met so that the multiple

light beam safety device can fulfill its protective function.

°

The active and passive units must be arranged such that persons or parts of

the body are safely detected when they enter the hazardous area.

°

Reaching under, over, and around as well as moving the multiple light beam

safety device must be prevented.

°

Check whether additional safety measures (e.g. restart interlock) are neces‐

sary when it is possible for people to be located between the protective

device and the hazardous point without being detected.

DANGER

H

azard due to lack of effectiveness of the protective device

Certain types of light radiation can influence the protective device, e.g., light radiation

from fluorescent lamps with electronic ballast installed in the path of the beam, or

beams from laser pointers directed at the active unit.

b

If this type of light radiation is present in the environment of the protective device,

take additional measures to ensure that the protective device does not become

dangerous.

Further topics

•

"Mount

ing", page 44

4.3.1 Scanning range and beam separation

Beam separation and number of beams

T

he beam separation is the distance between two adjacent light beams, measured

from the center of one beam to the center of the next.

Scanning range

The scanning range is the maximum dimension of the light path between active and

passive units.

Further topics

•

"Minimum distance from reflective surfaces", page 21

•

"Technical data", page 87

4.3.2 Minimum distance from the hazardous point

A minimum distance must be maintained between the multiple light beam safety

de

vice and the hazardous point. This distance is required to prevent a person or part of

the body from reaching the hazardous area before the dangerous state of the machine

state has completed.

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Calculating the minimum distance according to ISO 13855

T

he calculation of the minimum distance is based on international or national stan‐

dards and statutory requirements applicable at the place of installation of the machine.

If the minimum distance is calculated according to ISO 13855, then it depends on the

following points:

•

Machine stopping time (time interval between triggering the sensor function and

the end of the machine’s dangerous state)

•

Response time of the protective device

•

Approach speed of personnel

•

Type of approach: orthogonal (at right angles)

•

Parameters specified based on the application

For the USA (scope of OSHA and ANSI), different regulations may apply, e.g.:

a) Laws: Code of Federal Regulations, Title 29 (CFR29) Part 1910.217

b) Standards: ANSI B11.19

Complementary information

A

dditional information is available in the ISO 13855 standard and in the Guidelines

Safe Machinery.

SICK offers a stopping/run-down time measurement service in many countries.

Further topics

•

"T

echnical data", page 87

4.3.2.1 Calculating minimum distance from the hazardous point

Important information

DANGER

Minimum dis

tance from the hazardous point is too small

The dangerous state of the machine may not be stopped or not be stopped in a timely

manner due to a minimum distance that is too small.

b

Calculate the minimum distances for the machine in which the multiple light beam

safety device is integrated.

b

When mounting the multiple light beam safety device, observe the minimum dis‐

tance.

Approach

The example shows the calculation of the minimum distance for an orthogonal (at right

angles) approach to the multiple light beam safety device. Depending on the applica‐

tion and the ambient conditions, a different calculation may be required (e.g., at a dif‐

ferent angle to the direction of approach or an indirect approach).

1. Calculate S using the following formula:

S = 1,600 mm/s × T + C

where:

°

S = minimum dis

tance in millimeters (mm)

°

T = machine stopping time + response time of the protective device after

interruption in the light path in seconds (s)

4 P

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SICK deTem4 LT Muting A/P - Multiple light beam safety device Operating instructions

SICK deTem4 LT Muting A/P - Multiple light beam safety device Operating instructions

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