SICK deTec4 Core, deTec2 Core Operating Instructions Manual
deTec4 Core
Safety light curtain
O P E R A T I N G I N S T R U C T I O N S
Described product
deT
ec4 Core
Manufacturer
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Legal information
his work is protected by copyright. Any rights derived from the copyright shall be
T
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.
© SICK AG. All rights reserved.
Original document
T
his document is an original document of SICK AG.
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Contents
CONTENTS
1 About this document........................................................................ 6
1.1 Scope......................................................................................................... 6
1.2 Target groups and structure of these operating instructions................ 6
1.3 Additional information.............................................................................. 7
1.4 Symbols and document conventions...................................................... 7
2 Safety information............................................................................ 9
2.1 General safety notes................................................................................ 9
2.2 Correct use................................................................................................ 9
2.3 Requirements for the qualification of personnel.................................... 10
3 Product description........................................................................... 11
3.1 Structure and function............................................................................. 11
3.2 Product characteristics............................................................................ 12
3.2.1 Absence of blind zones........................................................... 12
3.2.2 Automatic calibration of the protective field width................ 12
3.2.3 Status indicators...................................................................... 12
3.3 Example applications............................................................................... 15
4 Project planning................................................................................ 17
4.1 Manufacturer of the machine.................................................................. 17
4.2 Operator of the machine.......................................................................... 17
4.3 Design........................................................................................................ 17
4.3.1 Scanning range and protective field width............................. 18
4.3.2 Minimum distance from the hazardous point....................... 18
4.3.3 Minimum distance to reflective surfaces............................... 21
4.3.4 Protection against interference from systems in close prox‐
y to each other................................................................... 22
imit
4.4 Integration in electrical control................................................................ 23
4.4.1 Restart interlock...................................................................... 25
4.4.2 External device monitoring (EDM).......................................... 26
4.4.3 Connection diagrams.............................................................. 26
4.5 Testing plan............................................................................................... 27
4.5.1 Test rod check.......................................................................... 28
4.5.2 Visual check of the machine and the protective device........ 29
5 Mounting............................................................................................. 31
5.1 Safety......................................................................................................... 31
5.2 Unpacking.................................................................................................. 31
5.3 Installation................................................................................................ 32
5.3.1 Mounting the QuickFix bracket............................................... 34
5.3.2 Mounting the FlexFix bracket.................................................. 35
5.3.3 Mounting the upgrade bracket............................................... 38
6 Electrical installation........................................................................ 41
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CONTENTS
6.1 Safety......................................................................................................... 41
6.2 System connection (M12, 5-pin)............................................................. 42
6.3 System connection via connection cable (M12, 5-pin to 8-pin)............ 43
7 Commissioning.................................................................................. 44
7.1 Safety......................................................................................................... 44
7.2 Overview.................................................................................................... 45
7.3 Switching on.............................................................................................. 45
7.4 Alignment of the sender and receiver..................................................... 45
7.4.1 Aligning the sender and receiver............................................ 46
7.4.2 Alignment with the QuickFix bracket...................................... 47
7.4.3 Alignment with the FlexFix bracket or with the upgrade
br
acket...................................................................................... 47
7.4.4 Indication of the alignment quality......................................... 48
7.5 Check during commissioning and modifications.................................... 49
8 Operation............................................................................................ 50
8.1 Safety......................................................................................................... 50
8.2 Regular thorough check........................................................................... 50
9 Maintenance...................................................................................... 51
9.1 safety......................................................................................................... 51
9.2 Regular cleaning....................................................................................... 51
9.3 Regular thorough check........................................................................... 52
10 Troubleshooting................................................................................. 53
10.1 Safety......................................................................................................... 53
10.2 Diagnostic LEDs........................................................................................ 53
10.2.1 Fault indicators........................................................................ 53
11 Decommissioning............................................................................. 56
11.1 Protection of the environment................................................................. 56
11.2 Disposal..................................................................................................... 56
12 Technical data.................................................................................... 57
12.1 Data sheet................................................................................................. 57
12.2 Response time.......................................................................................... 59
12.3 Power consumption.................................................................................. 59
12.4 Length of cable......................................................................................... 60
12.5 Table of weights........................................................................................ 60
12.6 Dimensional drawings.............................................................................. 61
13 Ordering information........................................................................ 63
13.1 Scope of delivery....................................................................................... 63
13.2 Ordering information deTec4 Core........................................................... 63
14 Accessories........................................................................................ 64
14.1 Brackets.................................................................................................... 64
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CONTENTS
14.2 Mounting accessories.............................................................................. 66
14.3 Weld spark guard...................................................................................... 67
14.4 Connectors................................................................................................ 67
14.5 Alignment aid............................................................................................ 68
14.6 Deflector mirrors....................................................................................... 68
14.6.1 Function and use..................................................................... 68
14.6.2 Mounting.................................................................................. 69
14.6.3 Change in scanning range using deflector mirrors................ 69
14.6.4 Deflector mirror PNS75 - ordering information...................... 70
14.6.5 Deflector mirror PSN125 - ordering information................... 70
14.7 Mirror columns and device columns....................................................... 71
14.7.1 Mirror columns......................................................................... 71
14.7.2 Device columns........................................................................ 71
14.8 Cleaning agent.......................................................................................... 71
14.9 Test rods.................................................................................................... 72
15 Annex.................................................................................................. 73
15.1 Compliance with EU directives................................................................. 73
15.2 Note on specified standards.................................................................... 74
15.3 Checklist for initial commissioning and commissioning........................ 75
16 List of figures..................................................................................... 76
17 List of tables....................................................................................... 77
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1 ABOUT THIS DOCUMENT
1 About this document
These operating instructions contain information required during the life cycle of the
afety light curtain.
s
These operating instructions are available to all those who work with the safety light
curtain.
Please read these operating instructions carefully and make sure that you understand
the content fully before working with the safety light curtain.
1.1 Scope
These operating instructions only apply to the deTec4 Core safety light curtain with one
of t
he following type label entries in the “Operating Instructions” field:
8014251
•
8014251/WQ70
•
8014251/WS65
•
8014251/Y310
•
This document is included with the following SICK part numbers (this document in all
available language versions):
8014251/ZOH3
1.2 Target groups and structure of these operating instructions
These operating instructions are intended for the following target groups: Project devel‐
oper
s (planners, developers, designers), installers, electricians, safety experts (e.g., CE
authorized representatives, compliance officers, persons who test and approve the
application), operators, and maintenance personnel.
The structure of these operating instructions is based on the life cycle phases of the
safety light curtain: Project planning, mounting, electrical installation, commissioning,
operation, and maintenance.
In many applications, the target groups are assigned as follows to the manufacturer
and the organization operating the machine in which the safety light curtain is inte‐
grated:
Area of responsibility Target group Special chapters of these operating instruc‐
Manufacturer Project developers
(planners, developers,
designers)
Installers Mounting, pa
Electricians Electrical installation, pa
Safety specialists Project planning, page 17
1)
tions
Project planning, page 17
Technical data, page 57
Accessories, page 64
Commissioning, page 44
Technical data, page 57
Checklist for initial commissioning and com‐
missioning, page 75
ge 31
ge 41
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ABOUT THIS DOCUMENT 1
Area of responsibility Target group Special chapters of these operating instruc‐
Operating company Operator Operation, page 50
1)
Chapters not listed here are intended for all target groups. All target groups must take into account the
s
afety and warning instructions of the complete operating instructions!
In other applications, the operating organization is also the manufacturer of the equip‐
ment w
ith the corresponding allocation of the target groups.
1.3 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 of drawings and dimensional drawings
•
Certificates (e.g. EU declaration of conformity)
•
Guide for Safe Machinery Six steps to a safe machine
•
Maintenance person‐
l
ne
1)
t
ions
Troubleshooting, page 53
Maintenance, page 51
Troubleshooting, page 53
Ordering information, page 63
1.4 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
ates a situation presenting possible danger, which may lead to death or serious
Indic
injuries if not prevented.
CAUTION
ates a situation presenting possible danger, which may lead to moderate or minor
Indic
injuries if not prevented.
NOTICE
Indic
ates a situation presenting possible danger, which may lead to property damage if
not prevented.
NOTE
Indicates useful tips and recommendations.
Instructions to action
T
he arrow denotes instructions to action.
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1 A
BOUT THIS DOCUMENT
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:
The LED is off.
o
The LED is flashing.
Ö
The LED is illuminated continuously.
O
Sender and receiver
T
hese symbols indicate the sender and receiver of the device:
The symbol indicates the sender.
s
The symbol indicates the receiver.
r
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2 Safety information
This chapter contains information on general safety for the safety light curtain.
e safety information about specific usage situations of the safety light curtain is
Mor
available in the respective chapters.
2.1 General safety notes
DANGER
H
azard due to lack of effectiveness of the protective device
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
Please read this document carefully and make sure that you understand the con‐
b
tent fully before working with the device.
Follow all safety notes in this document.
b
2.2 Correct use
SAFETY INFORMATION 2
Overview
he deTec4 Core safety light curtain is an electro-sensitive protective device (ESPE) and
T
is suitable for the following applications:
Hazardous point protection
•
Access protection
•
Hazard area protection
•
The deTec4 Core safety light curtain must only be used within the limits of the prescri‐
bed and s
Any instance of improper use, incorrect modification, or manipulation of the
deTec4 Core safety light curtain shall void any warranty provided by SICK AG; further‐
more, SICK AG shall not accept any responsibility or liability for any resulting damage
and consequential damage.
Important information
DANGER
azard due to lack of effectiveness of the protective device
H
Persons and parts of the body to be protected may not be recognized in case of non-
observance.
The safety light curtain works as an indirect protective measure and cannot provide pro‐
tection from parts thrown out nor from emitted radiation. Transparent objects are not
detected.
pecified technical data and operating conditions at all times.
Only use the safety light curtain as an indirect protective measure.
b
Foreseeable misuse
g others, the deTec4 Core safety light curtain is not suitable for the following
Amon
applications:
Outdoors
•
Underwater
•
In explosion-hazardous areas
•
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2 S
AFETY INFORMATION
t altitudes over 3,000 m above sea level NHN
A
•
In environments with enhanced ionizing radiation
•
2.3 Requirements for the qualification of personnel
The safety light curtain must be configured, installed, connected, commissioned and
viced only by qualified safety personnel.
ser
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
For mechanical mounting, a person is considered competent when he/she has the
expertise and experience in the relevant field and is sufficiently familiar with the appli‐
cation of the protective device on the machine that he/she can assess its operational
safety status.
Electrical installation
For electrical installation, a person is considered competent when he/she has the
expertise and experience in the relevant field and is sufficiently familiar with the appli‐
cation of the protective device on the machine that he/she can assess its operational
safety status.
Commissioning
or commissioning, a person is considered competent when he/she has the expertise
F
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 operational safety sta‐
tus.
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.
An operator must clean the safety light curtain and carry out specific checks as
instructed. Additional information for the operator of the machine: see "Operation",
page 50, and see "Regular cleaning", page 51.
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3 Product description
This chapter provides information on the operation of the safety light curtain and shows
xamples of its range of use.
e
3.1 Structure and function
Overview
T
he deTec4 Core safety light curtain is an electro-sensitive protective device (ESPE) con‐
sisting of a sender and receiver.
A series of parallel infrared light beams form a protective field between sender and
receiver that protects the hazardous area (hazardous point, access, and hazardous
area protection). When one or more beams are completely interrupted, the safety light
curtain 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.
Sender and receiver automatically synchronize themselves optically. An electrical con‐
nection between both components is not required.
PRODUCT DESCRIPTION 3
Figure 1: Sender and receiver
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3 P
RODUCT DESCRIPTION
Protective field height
T
he protective field height indicates the range within which the test rod belonging to the
safety light curtain is reliably detected. The size of the safety light curtain determines
the protective field height. The design and construction of the safety light curtain
extends the protective function of a device to the end of the housing without any blind
spots.
Protective field width
The protective field width is the dimension of the light path between sender and
receiver. The maximum protective field width is limited by the scanning range.
Resolution
The resolution describes the size of the smallest object detected by the safety light cur‐
tain in the protective field. The resolution corresponds to the diameter of the test rod
belonging to the safety light curtain, which is reliably detected when in the protective
field.
With the appropriate resolution, the safety light curtain provides finger and hand protec‐
tion.
Scanning range
The scanning range is the maximum protective field width. It is subject to the resolution
variant (14 mm or 30 mm).
The scanning range is reduced by using deflector mirrors and/or a weld spark guard.
Further topics
"D
ata sheet", page 57
•
"Deflector mirrors", page 68
•
"Weld spark guard", page 67
•
3.2 Product characteristics
3.2.1 Absence of blind zones
The design and construction of the safety light curtain extends the protective function
of a de
vice to the end of the housing without any blind spots. The absence of blind
zones reduces the space requirement when integrated in the machine.
3.2.2 Automatic calibration of the protective field width
When switched on, the safety light curtain automatically calibrates to the protective
field width.
3.2.3 Status indicators
The sender and receiver LEDs indicate the operating status of the safety light curtain.
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Sender indicators
Resolution 30 mmResolution 14 mm
ERR
PWR
ERR
PWR
PRODUCT DESCRIPTION 3
Figure 2: Sender indicators
T
wo light emitting diodes on the sender indicate the operational status:
Position LED color Indication Labeling
1
2
Complete overview of the LED statuses and their meanings: see "Dia
Yellow Status indicator PWR
Red Fault indicator ERR
gnostic LEDs",
page 53.
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Resolution 30 mmResolution 14 mm
ERR
OSSD
ERR
OSSD
1 2 3 4
1 2 3 4
2
1
3
3 P
RODUCT DESCRIPTION
Receiver indicators
Figure 3: Receiver indicators
S
ix light emitting diodes on the receiver indicate the operational status:
Position LED color Indication Labeling
1
2
3
Red/green OSSD status OSSD
Red Fault indicator ERR
Blue Alignment quality 1, 2, 3, 4
The blue alignment quality LEDs in combination with the red flashing ERR LED also
te fault indications.
deno
Complete overview of the LED statuses and their meanings: see "Diagnostic LEDs",
page 53.
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3.3 Example applications
PRODUCT DESCRIPTION 3
Figure 4: Hazardous point protection
Figure 5: Access protection
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3 P
RODUCT DESCRIPTION
Figure 6: Hazardous area protection
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4 Project planning
This chapter includes important information about the proper integration of the safety
ght curtain in machines for planners, developers and designers.
li
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 nonobservance.
Conduct a risk assessment and check whether additional protective measures are
b
required.
Comply with the applicable national regulations derived from the application (e.g.,
b
work safety regulations, safety rules, or other relevant safety guidelines).
Do not combine the components of the safety light curtain with components from
b
other safety light curtains.
Apart from for the procedures described in this document, the components of the
b
safety light curtain must not be opened.
The components of the safety light curtain must not be tampered with or changed.
b
Do not carry out any repairs on the device components. Improper repair of the pro‐
b
tective device can lead to a loss of the protective function.
PROJECT PLANNING 4
4.2 Operator 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 nonobservance.
Changes to the electrical integration of the safety light curtain in the machine con‐
b
trol and changes to the mechanical installation of the safety light curtain require
another risk assessment. The results of this risk assessment may require the
operator of the machine to meet the obligations of a manufacturer.
Apart from the procedures described in this document, the components of the
b
safety light curtain must not be opened.
The components of the safety light curtain must not be tampered with or changed.
b
Do not carry out any repairs on the device components. Improper repair of the pro‐
b
tective device can lead to a loss of the protective function.
4.3 Design
Overview
T
his chapter contains important information about the design.
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4 PROJECT PLANNING
Important information
DANGER
azard due to lack of effectiveness of the protective device
H
Persons and parts of the body to be protected may not be recognized in case of non-
observance.
Make sure that the following construction requirements are met so that the safety
b
light curtain can fulfill its protective function.
Sender and receiver must be arranged such that persons or parts of the body
°
are reliably detected when they enter the hazardous area.
Reaching under, over, and around as well as moving the safety light curtain
°
must be prevented.
Check whether additional safety measures (e.g. restart interlocking) are nec‐
°
essary when it is possible for people to be located between the protection
system and the danger point without being detected.
Further topics
"Mount
•
4.3.1 Scanning range and protective field width
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 nonobservance.
The safety light curtain can only be mounted on machines on which the protective
b
field width does not change when the safety light curtain is switched on.
Scanning range
he scanning range limits the maximum protective field width. The protective field width
T
cannot change during operation.
The scanning range is reduced by using deflector mirrors and/or a weld spark guard.
Protective field width
T
he protective field width is the dimension of the light path between sender and
receiver.
The protective field width is automatically calibrated when the safety light curtain is
switched on during initialization and must not be changed during operation.
ing", page 31
Further topics
"T
echnical data", page 57
•
"Deflector mirrors", page 68
•
"Weld spark guard", page 67
•
4.3.2 Minimum distance from the hazardous point
Overview
18
A minimum dis
ardous point. This distance is required to prevent a person or part of their body from
reaching the hazardous point before the end of the machine’s dangerous state.
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tance must be maintained between the safety light curtain and the haz‐
Subject to change without notice
PROJECT PLANNING 4
Calculating the minimum distance according to ISO 13855
T
he calculation of the minimum distance is based on international or national stand‐
ards and statutory requirements applicable at the place of installation of the machine.
If the minimum distance is calculated according to ISO 13855, it depends on the fol‐
lowing 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 Equipment.
•
Reach or approach speed of the person
•
Resolution (detection capability) of the safety light curtain
•
Type of approach: orthogonal (at right angles) or parallel
•
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 (CFR 29), 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
"R
esponse time", page 59
•
4.3.2.1 Calculating minimum distance from the hazardous point
Important information
DANGER
Minimum dis
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.
Calculate the minimum distances for the machine in which the safety light curtain
b
is integrated.
When mounting the safety light curtain, observe the minimum distance.
b
Approach
The example shows the calculation of the minimum distance for an orthogonal (rightangled) approach to the protective field. A different calculation may be required
depending on the application and the ambient conditions (e.g., for a protective field
parallel to or at any angle to the direction of approach or an indirect approach).
tance from the hazardous point is too small
1. First, calculate S using the following formula:
S = 2,000 mm/s × T + 8 ×(d – 14 mm)
Where:
S = minimum dis
°
T = machine stopping time + response time of the protective device after
°
interruption in the light path in seconds (s)
d = resolution of the safety light curtain in millimeters (mm)
°
The reach or approach speed is already included in the formula.
2. If the result S is ≤ 500 mm, then use the determined value as the minimum dis‐
ance.
t
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tance in millimeters (mm)
19
3
4
1
2
4 P
ROJECT PLANNING
3. If the result S is > 500 mm, then recalculate S as follows:
S = 1,600 mm/s × T + 8 ×(d – 14 mm)
4. If the new value S is > 500 mm, then use the newly determined value as the mini‐
mum dis
tance.
5. If the new value S is ≤ 500 mm, then use 500 mm.
Figure 7: Minimum distance to hazardous point for orthogonal (right-angled) approach to protec‐
t
ive field
Minimum distance S
1
Protective field height
2
Hazardous point
3
Depending on the application and distance, persons must be prevented from standing
4
behind the protective device.
Example calculation
Mac
hine stopping time = 290 ms
Response time after interruption of the light path = 30 ms
Resolution of the safety light curtain = 14 mm
T = 290 ms + 30 ms = 320 ms = 0.32 s
S = 2,000 mm/s × 0.32 s + 8 × (14 mm – 14 mm) = 640 mm
S > 500 mm, therefore:
S = 1,600 mm/s × 0.32 s + 8 × (14 mm – 14 mm) = 512 mm
4.3.2.2 Taking reach over into account
If access to the hazardous area by reaching over a protective field cannot be prevented,
t
he height of the protective field and minimum distance of the ESPE must be deter‐
mined. This is done by comparing the calculated values based on the possible detec‐
tion of limbs or body parts with the values resulting from reaching over the protective
field. The greater value resulting from this comparison must be used.
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Figure 8: Representation of the accessibility of electro-sensitive protective device by reaching
D
a
o
ver. Left: Protective field that cannot be reached over. Right: Protective field that can be reached
over.
4.3.3 Minimum distance to reflective surfaces
Overview
T
he light beams from the sender may be deflected by reflective surfaces and dispersive
media. This may prevent an object from being detected.
Therefore, all reflective surfaces and objects (e.g. material bins, machine table, etc.)
must maintain a minimum distance (a) from the protective field. This minimum dis‐
tance (a) must be maintained on all sides of the protective field. This applies in horizon‐
tal, vertical and diagonal directions as well as at the end of the safety light curtain. The
same area must be free of dispersive media (e.g., dust, fog, or smoke).
PROJECT PLANNING 4
The minimum distance (a) depends on the distance (D) between sender and receiver
(protective field width).
Figure 9: Minimum distance from reflective surfaces
Important information
DANGER
azard due to lack of effectiveness of the protective device
H
Reflective surfaces and dispersive media can prevent persons or parts of the body to
be protected from being properly reflected and, therefore, remain undetected.
Make sure that all reflective surfaces and objects maintain a minimum distance
b
from the protective field.
Make sure that no dispersive media (e.g., dust, fog, or smoke) are within the calcu‐
b
lated minimum distance from the protective field.
Determining minimum distance to reflective surfaces
D
etermine the distance between sender and receiver D in meters (m).
b
Read the minimum distance a in millimeters (mm) in the graph or calculate it
b
based on the respective formula table 1:
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21
500
400
300
200
100
a/mm
1 2 3 4 5 6 7 8 9 10 11 12 D/m
1
2
4 PROJECT PLANNING
Figure 10: Graph of minimum distance from reflective surfaces
T
able 1: Formula for calculating the minimum distance from reflective surfaces
Distance D between sender and
r
eceiver in m
D ≤ 3 m a = 131 mm
D > 3 m a = tan (2.5°) × 1,000 mm/m × D = 43.66 × 1 mm/m ×
Calculation of the minimum distance (a) from reflective
surfaces in mm
D
4.3.4 Protection against interference from systems in close proximity to each other
Overview
1
Figure 11: Preventing mutual interference from system
and system
The infrared light beams of the sender of system 1 can interfere with the receiver of
system 2. This can disrupt the protective function of system 2. This would mean that
the operator is at risk.
Avoid such installation situations or take appropriate action, e.g., install optically opa‐
que partitions or reverse the direction of transmission of a system.
Important information
DANGER
azard due to lack of effectiveness of the protective device
H
Systems of safety light curtains that operate in close proximity to each other can inter‐
fere with each other.
Use appropriate measures to prevent systems in close proximity from interfering
b
with each other.
2
22
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4.3.4.1 Using reversed direction of transmission
1
2
Using reversed direction of transmission
T
he direction of transmission of the system 2 can be changed during installation by
switching the positions of the sender and receiver. With reversed direction of transmis‐
sion, the receiver 2 is not affected by the infrared light from the sender 1.
Figure 12: Trouble-free operation due to reversed direction of transmission of system
tem
2
4.4 Integration in electrical control
Overview
his chapter contains important information about integration in the electrical control.
T
Information about the individual steps for electrical installation of the device: see "Elec‐
trical installation", page 41.
PROJECT PLANNING 4
1
and sys‐
Requirements for use
The output signals of the protective device must be analyzed by downstream controllers
in such a way that the dangerous state of the machine is ended safely. Depending on
the safety concept, the signal is analyzed by, e.g., safety relays or a safety controller.
DANGER
azard due to lack of effectiveness of the protective device
H
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
Make sure that the following control and electrical requirements are met so that
b
the safety light curtain can fulfill its protective function.
t be possible to electrically influence the control of the machine.
It mus
•
The electrical control of the machine must meet the requirements of IEC 60204-1.
•
A restart interlock must be implemented depending on applicable national regula‐
•
tions or required reliability of the safety function. Because the safety light curtain
does not have this function, it must be implemented in the external control if
required.
When using a safety controller, different signal levels of both OSSDs must be
•
detected depending on applicable national regulations or required reliability of the
safety function. The maximum discrepancy time tolerated by the control must be
selected according to the application.
The OSSD1 and OSSD2 output signals must not be connected to each other.
•
In the machine controller, the signals of both OSSDs must be processed sepa‐
•
rately.
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23
4 P
ROJECT PLANNING
Figure 13: Dual-channel and isolated connection of OSSD1 and OSSD2
he machine must switch to the safe state at any time if at least one of the two
T
•
OSSDs switches to the OFF state.
Prevent the formation of a potential difference between the load and the protec‐
•
tive device. If you connect loads to the OSSDs (safety outputs) that then also
switch if controlled with negative voltage (e.g., electro-mechanical contactor with‐
out reverse polarity protection diode), you must connect the 0 V connections of
these loads and those of the corresponding protective device individually and
directly to the same 0 V terminal strip. In the event of a fault, this is the only way to
ensure that there can be no potential difference between the 0 V connections of
the loads and those of the corresponding protective device.
24
Figure 14: No potential difference between load and protective device
DANGER
azard due to lack of effectiveness of the protective device
H
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
Downstream contactors must be positively guided and monitored depending on appli‐
cable national regulations or required reliability of the safety function.
Make sure that downstream contactors are monitored (external device monitoring,
b
EDM).
ause the safety light curtain does not have integrated external device monitor‐
Bec
b
ing, this must be implemented in the external control, if required.
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