Datalogic and the Datalogic logo are registered trademarks of Datalogic S.p.A. in many countries, including
the U.S.A. and the E.U. All other trademarks and brands are property of their respective owners.
Datalogic shall not be liable for technical or editorial errors or omissions contained herein, nor for incidental
or consequential damages resulting from the use of this material.
CE COMPLIANCE
CE marking states the compliance of the product with essential requirements listed in the applicable
European directive. Since the directives and applicable standards are subject to continuous updates, and
since Datalogic promptly adopts these updates, therefore the EU declaration of conformity is a living
document. The EU declaration of conformity is available for competent authorities and customers through
Datalogic commercial reference contacts. Since April 20th, 2016 the main European directives applicable to
Datalogic products require inclusion of an adequate analysis and assessment of the risk(s). This evaluation
was carried out in relation to the applicable points of the standards listed in the Declaration of Conformity.
Datalogic products are mainly designed for integration purposes into more complex systems. For this reason
it is under the responsibility of the system integrator to do a new risk assessment regarding the final
installation.
Warning
This is a Class A product. In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
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1 GENERAL INFORMATION ........................................................................................................ 8
1.1 General description ..................................................................................................................... 8
7.2 Test ........................................................................................................................................... 39
The microprocessor guarantees the check and the management of the beams that are sent and received through
the units: the microprocessor – through some LEDs – informs the operator about the general conditions of the
safety light curtain, both for settings and for diagnostics (see cfr.USER INTERFACE AND DIAGNOSTICS page
54).
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NORM
DESCRIPTION
EN 61496-1: 2013
Safety of machinery: electrosensitive protective equipment.
Part 1: General prescriptions and tests.
EN 61496-2: 2013
Safety of machinery: electrosensitive protective equipment - Particular requirements
for equipment using active optoelectronic protective devices.
EN ISO 13849-1: 2015
Safety of machinery. Safety-related parts of control systems.
Part 1: General principles for design
EN 61508-1: 2010
Functional safety of electrical/electronic/programmable electronic safety-related
systems.
Part 1: General requirements
EN 61508-2: 2010
Functional safety of electrical/electronic/programmable electronic safety-related
systems.
Part 2: Requirements for electrical/electronic/programmable electronic safetyrelated systems
EN 61508-3: 2010
Functional safety of electrical/electronic/programmable electronic safety-related
systems.
Part 3: Software requirements
EN 61508-4: 2010
Functional safety of electrical/electronic/programmable electronic safety-related
systems.
Part 4: Definitions and abbreviations
EN 62061:2005/A2: 2015
Safety of machinery. Functional safety of electrical/ electronic/programmable
electronic safety-related control systems.
1 GENERAL INFORMATION
1.1 GENERAL DESCRIPTION
The safety light curtains are optoelectronic multibeam devices that are used to protect working areas that, in
presence of machines, robots, and automatic systems in general, can become dangerous for operators that can
get in touch, even accidentally, with moving parts.
The light curtains are intrinsic safety systems used as accident-prevention protection devices and are
manufactured in accordance with the international Standards in force for safety, in particular:
The device, consisting of one emitter and one receiver contained inside aluminium profiles, generates infrared
beams that detect any opaque object positioned within the light curtain detection field.
The emitter and the receiver are equipped with the command and control functions.
The connections are made through one or more connectors as specified in cfr.ELECTRICAL CONNECTIONS
page 28.
The synchronisation between the emitter and the receiver takes place optically, i.e. no electrical connection
between the two units is required.
The microprocessor guarantees the check and the management of the beams that are sent and received through
the units: the microprocessor – through some LEDs – informs the operator about the general conditions of the
safety light curtain (cfr.USER INTERFACE AND DIAGNOSTICS page 54).
The receiver is the main controller for all functions. It monitors all safety actions in case of failure and performs
general functions as well.
During installation, an user interface facilitates the alignment of both units (cfr.ALIGNMENT PROCEDURE page
32).
As soon as an object, or a limb or the operator’s body accidentally interrupts one or some of the infrared beams
sent by the emitter, the receiver immediately opens the OSSD outputs or trigger Safety State over connected
safety Fieldbus.
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Notes and detailed descriptions about particular characteristics of the safety devices in
order to better explain their functioning. Special instructions regarding the installation
process.
Some parts or sections of this manual containing important information for the user or installing operator are
preceded by a note:
This manual contains all the information necessary for the selection and operation of the safety devices.
However, specialised knowledge not included in this technical description is required for the planning and
implementation of a safety light curtain on a power-driven machine.
As the required knowledge may not be completely included in this manual, we suggest the customer to contact
Datalogic Technical Service for any necessary information relative to the functioning of the light curtains and the
safety rules that regulate the correct installation (cfr. USER INTERFACE AND DIAGNOSTICS page 54).
1.2 PACKAGE CONTENTS
Package contains the following objects:
Receiver (RX)
Emitter (TX)
Quick Guide of safety light curtain
Periodical checklist and maintenance schedule
Mini-DVD with instruction manual and other documents
4 angled fixing brackets and specific fasteners
2 additional angled fixing brackets for models with heights included between 1200 and 1800 mm
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1.3 NEW FEATURES COMPARED TO SG2 BASE / SG2 EXTENDED
With respect to SG2 BASE / SG2 EXTENDED series, safety light curtains of SG2 MUTING series have some new
important features:
Higher operating distance
New profile compatible with SE accessories
Advanced alignment function for receiver and transmitter units
Muting function
Partial muting
Override
Override status
Reduction Range
Null dead zone (the controlled height of the light curtain is equivalent to the light curtain’s height)
Basic configuration with push-buttons (BCM)
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R=30 mm
Hand protection
Fig 2 - Detection capability
1.4 HOW TO CHOOSE THE DEVICE
There are at least three different main characteristics that should be considered when choosing a safety light
curtain, after having evaluated the risk assessment.
1.4.1 Detection capability
The detection capability (or resolution) of the device is the minimum diameter that an opaque object must have in
order to obscure at least one of the beams that constitute the detection zone and to actuate the sensing device.
The resolution is related to the part of the body to be protected.
As shown in Fig 2 - page 11, the resolution only depends on the geometrical characteristics of the lenses,
diameter and distance between centres, and is independent of any environmental and operating conditions of the
safety light curtain.
The resolution value is obtained applying the following formula:
where:
I=Interaxes between two adjacent optics
d=Lens diameter
R = I + d
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Fig 3 - Detection Zone
MODEL
Controlled height Hp
(mm)
SG2-30-030-OO-W
300
SG2-30-045-OO-W
450
SG2-30-060-OO-W
600
SG2-30-075-OO-W
750
SG2-30-090-OO-W
900
SG2-30-105-OO-W
1050
SG2-30-120-OO-W
1200
SG2-30-135-OO-W
1350
SG2-30-150-OO-W
1500
SG2-30-165-OO-W
1650
SG2-30-180-OO-W
1800
1.4.2 Height of the detection zone
The controlled height is the height protected by the safety light curtain.
K = Speed of the object, limb or body approaching the dangerous area in mm/sec
t1
=
Response time of the ESPE in seconds (see cfr.TECHNICAL DATA page 60)
t2 = Machine stopping time in seconds (including the Safety Control System)
C = Additional distance based on the possibility to insert the body or one of body parts inside
the dangerous area before the protective device trips.
C=8 (R -14) for devices with resolution ≤ 40 mm
C=850 mm for devices with resolution > 40 mm
R = Resolution of the system
K value is:
2000 mm/s if the calculated value of S is ≤ 500 mm
1600 mm/s if the calculated value of S is > 500 mm
1.4.3 Minimum installation distance
The safety device must be positioned at a specific safety distance (Fig 4 - page 13).
This distance must ensure that the dangerous area cannot be reached before the dangerous motion of the
machine has been stopped by the Safety Control System.
The safety distance depends on 4 factors, according to the EN ISO 13855 Standard:
Response time of the ESPE (the time between the effective beam interruption and the opening of the OSSD
contacts)
Machine stopping time including Safety Control System computing and actuating time if present.
ESPE resolution
Approaching speed of the object to be detected
The following formula is used for the calculation of the safety distance:
S = K (t1 + t2) + C
where:
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S =
Minimum safety distance in mm.
t1
=
Response time of the ESPE in seconds (cfr. TECHNICAL DATA page 60)
t2 = Machine stopping time in seconds (including the Safety Control System)
H = Beam height from ground; this height must always be less than 1,000 mm.
t2 = Machine total stopping time (Including safety control system).
T = (t1 + t2) Overall system stopping performance
C = 8 * (R – 14) for devices with resolution <= 40 mm
R = Resolution of the system
The reference standard is EN ISO 13855 “Safety of machinery - Positioning of
safeguards with respect to the approach speeds of parts of the human body”.
The following information is to be considered as indicative and concise.
For correct safety distance please refer to complete standard EN ISO 13855.
When devices with > 40 mm resolution are used, the height of the top beam has to be ≥ 900 mm (H2) from
machine supporting base while the height of the bottom beam has to be ≤ 300 mm (H1).
If the safety light curtain must be mounted in a horizontal position (Fig 5 - page 14) the distance between the
dangerous area and the most distant optical beam must be equal to the value calculated using the following
formula:
S = 1600 mm/s (t1 + t2) + 1200 - 0,4 H
where:
Practical examples
Let's suppose to have a light curtain with height = 600 mm
To calculate the distance of the device from the ESPE, in a vertical position, the following formula is used:
S = K*T + C
where:
In all cases, if K = 2000mm/sec then S > 500 mm.
Distance will have then to be recalculated using K = 1600 mm/sec.
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Fig 6 - Automatic packaging machines
Fig 7 - Presses and punching machines
Fig 8 - Benders and cutters
1.5 TYPICAL APPLICATIONS
The SG2 MUTING safety light curtains are used in all automation fields where the control and protection of access
to dangerous zones is necessary.
In particular they are used to stop the moving mechanical parts of:
Automatic machines
Packaging machines, handling machines, storing machines
Wood working machines, glass working machines, ceramics working machines, etc.
Automatic and semi–automatic assembly lines
Automatic warehouses
Presses, punching machines, benders and cutters
In food industry applications, DATALOGIC Technical Service has to verify the compatibility of the material of the
safety light curtain housing with any chemical agents used in the production process.
The following pictures show some main applications.
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For a correct and safe use of the safety light curtains, the following points must be
observed:
Please carefully read the instructions for the correct functioning before powering the
light curtain on.
1.6 SAFETY INFORMATION
The stopping system of the machine must be electrically controlled.
This control system must be able to stop the dangerous movement of the machine within the total machine
stopping time T as per paragraph Minimum installation distance page 13 and during all working cycle
phases.
Mounting and connection of the safety light curtain must be carried out by qualified personnel only, according
to the indications included in the special sections (refer to sections INSTALLATION page 17, MECHANICAL MOUNTING page 26, ELECTRICAL CONNECTIONS page 28, ALIGNMENT PROCEDURE page 32) and in
the applicable standards.
The safety light curtain must be securely placed in a particular position so that access to the dangerous zone is
not possible without the interruption of the beams (refer section INSTALLATION page 17).
The personnel operating in the dangerous area must be well trained and must have adequate knowledge of all
the operating procedures of the safety light curtain.
The TEST button must be located outside the protected area because the operator must check the protected
area during all Test operation.
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Make sure that the protection level assured by the light curtain device is compatible
with the real danger level of the machine to be controlled, according to EN ISO 13849-1:
2015 or EN 62061:2005/A2: 2015.
2 INSTALLATION
2.1 PRECAUTIONS TO BE OBSERVED FOR THE CHOICE AND INSTALLATION
Use only matched emitter and receiver pairs with same serial no.
The outputs (OSSD) of the ESPE must be used as machine stopping devices and not as command devices.
The machine must have its own START command.
The dimension of the smallest object to be detected must be larger than the resolution level of the device.
The ESPE must be installed in an environment complying with the characteristics indicated in TECHNICAL
DATA page 60.
The ESPE must not be installed close to strong and/or flashing light sources, in particular close to the front
window of receiving unit.
The presence of intense electromagnetic disturbances could affect device’s correct operation.
This condition shall be carefully assessed with the advice of DATALOGIC Technical Service.
The operating distance of the device can be reduced in presence of smog, fog or airborne dust.
A sudden change in environment temperature, with very low minimum peaks, can generate a small
condensation layer on the lenses and thus jeopardize correct operation.
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Fig 9 - Wrong light curtain positioning
Fig 10 - Correct light curtain positioning
Fig 11 - Wrong light curtain positioning
Fig 12 - Correct light curtain positioning
Fig 9 - page 18 shows some examples of possible access to the machine from the top
and the bottom sides. These situations may be very dangerous and so the installation
of the safety light curtain at sufficient height in order to completely cover the access to
the dangerous area (Fig 10 - page 18) becomes necessary.
If the operator is able to enter in the dangerous area, an additional mechanical
protection must be mounted to prevent the access.
2.2 GENERAL INFORMATION ON DEVICE POSITIONING
The safety light curtain should be carefully positioned in order to provide the necessary protection. Access to the
dangerous area must only be possible by passing through the protecting safety light beams.
Under standard operating conditions, machine starting must not be possible while operators are inside the
dangerous area.
Where it is not possible to install safety light curtain very near to the dangerous zone, a second light curtain must
be mounted in a horizontal position in order to prevent any lateral access, as shown in Fig 12 - page 18.
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Fig 13 - Distance from reflecting surfaces
2.2.1 Minimum distance from reflecting surfaces
Reflecting surfaces placed near the light beams of the safety device (over, under or laterally) can cause passive
reflections. These reflections can affect the recognition of an object inside the controlled area. Moreover, if the RX
receiver detects a secondary beam (reflected by the side-reflecting surface) the object might not be detected, even
if the object interrupts the main beam.
It is important to position the safety light curtain according to the minimum distance from reflecting surfaces.
The minimum distance depends on:
operating distance between emitter (TX) and receiver (RX);
real aperture angle of ESPE (EAA); especially:
for ESPE Type 2 EAA = 10° (α = ± 5°)
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Fig 14 - Minimum distance from reflective surface
Diagram of Fig 14 - page 20 shows the minimum distance from the reflecting surface (Dsr), based on the
operating distance:
The formula to get Dsr is the following:
For ESPE Type 2:
Dsr (m) = 0.6 for operating distance < 3 m
Dsr (m) = operating distance (m) x tg 2a for operating distance >= 3 m
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Fig 15 - Distance between homologous devices
Fig 16 - ESPE Type2
Operating distance (m)
Minimum installation distance (m)
3
0,3 6 0,4
10
0,5
19
0,6
The interfering device (TXB) must be positioned at the same Ddo distance, calculated as
shown above, even if closer to TXA respect to RXA.
Installation precautions have to be taken to avoid interference between homologous
devices. A typical situation is represented by the installation areas of several adjacent
safety devices aligned one next to the other, for example in plants with different
machines.
2.2.2 Distance between homologous devices
The following graphic shows the distance from the interfering devices (Ddo) according to the operating distance
(Ddo) of the couple ( TXA – RXA ).
If different safety devices have to be installed in adjacent areas, the emitter of one device must not interfere
dangerously with the receiver of the other device.
The TXB interfering device must be positioned outside a minimum Ddo distance from the TXA – RXA emitterreceiver couple axis.
This minimum Ddo distance depends on:
the operating distance between emitter (TXA) and receiver (RXA)
the effective aperture angle of the ESPE (EAA)
The following graphic shows the distance from the interfering devices (Ddo) according to the operating distance
(Ddo) of the couple ( TXA – RXA ).
The following table shows, for convenience, the values of the minimum installation distances relative to some
operating distances:
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Fig 17 - Recommended positioning for homologous devices
If two light curtains have to be mounted near each other as reported in the first example
of Fig 17 - page 22.
The figure provides two examples:
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Fig 18 - Wrong light curtain TX-RX orientations
2.2.3 Emitter and Receiver Orientation
The two units shall be assembled parallel each other, with the beams arranged at right angles with the emission
and receiving surface, and with the connectors pointing to the same direction.
The configurations shown in the figure must be avoided:
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Fig 19 - Use of deviating mirrors
Number of mirrors
Operating Distance
0
20 m
1
16 m
2.2.4 Use of deviating mirrors
The control of any dangerous area, with several but adjacent access sides, is possible using only one safety device
and well-positioned deviating mirrors.
The figure shows a possible solution to control two different access sides, using one mirror placed at 45° with
respect to the beams.
The operator must respect the following precautions when using the deviating mirrors:
The alignment of the emitter and the receiver can be a very critical operation when deviating mirrors are used.
Even very small displacements of the mirror is enough to lose alignment.
The use of DATALOGIC laser pointer accessory is recommended under these conditions.
The minimum safety distance (S) must be respected for each single section of the beams.
The effective operating range decreases by about 20% by using only one deviating mirror.
The following table shows estimated operating distances relating to the number of mirrors used.
The presence of dust or dirt on the reflecting surface of the mirror causes a drastic reduction in the range.
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Fig 20 - Path of the test piece
2.2.5 Controls after first installation
The control operations to carry-out after the first installation and before machine start-up are listed hereinafter. The
controls must be carried-out by qualified personnel, either directly or under the strict supervision of the person in
charge of machinery Safety.
Verify that:
L'ESPE rimanga in stato di SICUREZZA, e intercetti i raggi lungo la zona protetta utilizzando l'apposito test
piece (TP-14 o TP-30), secondo lo schema di Fig 20 - page 25.
ESPE has to be correctly aligned, press slightly on the product side in both directions the red LED must not
turn on
The activation of the TEST function (on TX side) causes the opening of the OSSD outputs (red LED, OSSD on
RX side, ON and controlled machine stop)
The response time at machine STOP, including the ESPE and machine response times, must be included in
the limits defined in the calculation of the safety distance (refer to chapter INSTALLATION page 17).
The safety distance between the dangerous parts and ESPE must comply with the requirements indicated in
chapter INSTALLATION page 17.
A person must not access or remain between ESPE and the dangerous parts of the machine
Access to the dangerous areas of the machine must not be possible from any unprotected area
ESPE must not be disturbed by external light sources, ensuring that it remains in NORMAL OPERATION
condition for at least 10-15 minutes and, placing the specific test piece in the protected area, in the SAFE state
for the same period.
Verify the correspondence of all the accessory functions, activating them in the different operating conditions.
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Fig 21 - Fixed brackets mounting procedure
Fig 22 - Anti-vibration dampers
3 MECHANICAL MOUNTING
The emitting (TX) and receiving (RX) units must be installed with the relevant sensitive surfaces facing each other.
The connectors must be positioned on the same side and the distance must be included within the operating range
of the model used (see cfr.TECHNICAL DATA page 60).
The two units must be positioned the most aligned and parallel possible.
The next step is the fine alignment, as shown in chapter ALIGNMENT PROCEDURE page 32.
Outfit angled fixing brackets kit, for units mounting, must be used as described below (Fig 21 - page 26).
Adjustable supports for adjusting unit inclinations around the axes are available on request (see
cfr.ACCESSORIES page 65).
To mount the angled fixing brackets kit, place the threaded pins metallic insert into the dedicated side seat of the
terminator cap side light curtain closing cap; slide the insert towards the metallic drawn profile groove.
Fix the bracket against the profile by tightening the M5 hexagonal nuts. It’s possible to slide the bracket group
along their dedicated rail and fix it once again just working on the above mentioned nuts.
In case of applications with particularly strong vibrations, vibration dampers, together with mounting brackets, are
recommended to reduce the impact of the vibrations.
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Fig 23 - Light curtain dimensions
MODEL
L (mm)
A (mm)
B (mm)
C (mm)
SG2-30-030-OO-W
306.3
86.3
110
-
SG2-30-045-OO-W
456.3
236.3
110
-
SG2-30-060-OO-W
606.2
306.2
150
-
SG2-30-075-OO-W
756.2
406.2
175
-
SG2-30-090-OO-W
906.1
506.1
200
-
SG2-30-105-OO-W
1056.1
606.1
225
-
SG2-30-120-OO-W
1206
966
150
453
SG2-30-135-OO-W
1356
1066
175
503
SG2-30-150-OO-W
1505.9
1166
200
553
SG2-30-165-OO-W
1655.9
1266
225
603
SG2-30-180-OO-W
1805.8
1366
250
652.9
The recommended mounting positions according to the light curtain length are shown in Fig 23 - page 27 and in
the following table.
All electrical connections to the emitting and receiving units are made through some particular cables; these cables
are composed of a rectangular 18 pin connector on light curtain side and M12 male connector(s) on the other side.
The Muting cable allows to have on the receiving unit one M12 12-pole connector and one M12 5-pole connector.
The Blanking cable allows to have on the receiving unit one M12 12-pole connector.
The emitting unit has one M12 5-pole connector (both in Muting and Blanking mode).
The cables have to be connected on the bottom side of the light curtains (leds and push button side) by removing
the white cap that is present.
Take care that the terminator cap (CVL-5196, see cfr.INCLUDED ACCESSORIES page 63) is connected on the
top side of the light curtains.
If this connection misses, Master and Slave units go in critical Communication failure.
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Fig 27 - M12 Connectors pinout
Fig 28 - Muting configuration
Fig 29 - Muting configuration receiver
Fig 30 - Configuration emitter
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