Pepperl+Fuchs SLCS User manual

Safety Light Curtain SLCS
Original Instructions
Sicherheits-Lichtvorhang SLCS
Originalbetriebsanleitung
EN
DE
FACTORY AUTOMATION
INSTRUCTIONS

With regard to the supply of products, the current issue of the following document
is applicable: The General Terms of Delivery for Products and Services of the Elec-
trical Industry, published by the Central Association of the Electrical Industry (Zen-
tralverband Elektrotechnik und Elektroindustrie (ZVEI) e.V.) in its most recent
version as well as the supplementary clause: "Expanded reservation of proprietor-
ship"
Es gelten die Allgemeinen Lieferbedingungen für Erzeugnisse und Leistungen der
Elektroindustrie, herausgegeben vom Zentralverband Elektroindustrie (ZVEI) e.V.
in ihrer neusten Fassung sowie die Ergänzungsklausel: "Erweiterter Eigentumsvor-
behalt".
EN
DE
Safety Light Curtain SLCS

Safety Light Curtain SLCS
Contents
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1 Introduction......................................................................... 3
2 Declaration of conformity .................................................. 4
2.1 Declaration of Conformity..............................................................................4
3 Safety................................................................................... 5
3.1 Symbols relevant to safety ............................................................................5
3.2 Intended use .................................................................................................5
3.3 General Safety Information ............................................................................5
4 Product Description ........................................................... 7
4.1 Use and Application......................................................................................7
4.2 Indicators and Operating Controls ................................................................8
4.3 Interfaces and connections ...........................................................................9
4.4 Delivery package ........................................................................................10
5 Installation......................................................................... 11
5.1 Preparation .................................................................................................11
5.2 Mounting.....................................................................................................13
5.3 Reflection....................................................................................................15
5.4 Connection and Operating Mode Setting....................................................16
5.4.1 Signal outputs on the receiver unit..........................................................17
5.4.2 Signal Inputs on the Transmitter Unit ......................................................18
5.4.3 Signal Inputs on the Receiver.................................................................19
5.4.4 Typical circuits ........................................................................................21
6 Commissioning................................................................. 22
6.1 Functional Testing .......................................................................................22
6.2 Multiple Positions........................................................................................22
7 Maintenance and Repair.................................................. 24
7.1 Maintenance ...............................................................................................24
7.2 Repair .........................................................................................................24
8 Troubleshooting................................................................ 25
8.1 Troubleshooting ..........................................................................................25

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Contents
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9 Appendix........................................................................... 26
9.1 Technical Data............................................................................................ 26
9.1.1 Standards .............................................................................................. 28
9.2 Profile length and weight ............................................................................ 29
9.3 Dimensional drawing.................................................................................. 30
9.4 Designation Code ...................................................................................... 31
9.5 Response times ......................................................................................... 33
9.6 Periodic Checks ......................................................................................... 34
9.7 Application Checklist.................................................................................. 35
9.8 Accessories................................................................................................ 36
9.8.1 Mounting Aid OMH-SLCT-01 ................................................................. 37
9.8.2 Mounting Aid OMH-SLCT-02 ................................................................. 39
9.8.3 Mounting Aids OMH-SLCT-03 and OMH-SLCT-04................................ 39
9.8.4 Mounting aid OMH-SLCT-05................................................................. 41
9.8.5 Alignment aid......................................................................................... 42
9.8.6 Test rod.................................................................................................. 42
9.8.7 Connection Cables ................................................................................ 43

Safety Light Curtain SLCS
Introduction
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1Introduction
Congratulations
You have chosen a device manufactured by Pepperl+Fuchs. Pepperl+Fuchs
develops, produces and distributes electronic sensors and interface modules for
the market of automation technology on a worldwide scale.
Before you install this device and put it into operation, please read the operating
instructions thoroughly. The instructions and notes contained in this operating
manual will guide you step-by-step through the installation and commissioning
procedures to ensure trouble-free use of this product. By doing so, you:
■guarantee safe operation of the device
■can utilize the entire range of device functions
■avoid faulty operation and associated errors
■reduce costs from downtimes and incidental repairs
■increase the effectiveness and operating efficiency of your plant.
Store this operating manual somewhere safe in order to have it available for future
work on the device.
Directly after opening the packaging, please ensure that the device is intact and
that the package is complete.
Contact
If you have any questions about the device, its functions, or accessories, please
contact us at:
Pepperl+Fuchs GmbH
Lilienthalstraße 200
68307 Mannheim
Telephone: [phone]
Fax: [phone]
E-Mail: [email protected]
Symbols used
The following symbols are used in this manual:
Handling instructions
You will find handling instructions beside this symbol
Note!
This symbol draws your attention to important information.

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Safety Light Curtain SLCS
Declaration of conformity
EN
2 Declaration of conformity
2.1 Declaration of Conformity
This product was developed and manufactured under observance of the
applicable European standards and guidelines.
The product manufacturer, Pepperl+Fuchs GmbH, 68307 Mannheim, Germany,
has a certified quality assurance system that conforms to ISO 9001.
Note!
A Declaration of Conformity can be requested from the manufacturer or
downloaded from www.pepperl-fuchs.com.
ISO9001

Safety Light Curtain SLCS
Safety
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3Safety
3.1 Symbols relevant to safety
3.2 Intended use
The SLCS safety light curtain may only be used in accordance with its intended
purpose as electro-sensitive protective equipment (ESPE) for securing hazardous
areas and dangerous locations.
If used for any other purpose, the intended function of the system can no longer
be guaranteed.
In addition to the notes in these instructions, the safety regulations, standards and
other regulations concerning the application must be taken into consideration.
3.3 General Safety Information
Only instructed specialist staff may operate the device in accordance with the
operating manual.
The following basic instructions must be observed at all times:
■The device must not be commissioned until the manual has been read and
understood
■The device must not be used out of specification without suitable protective
measures
■Tampering with the device is not permitted
■Do not remove the warnings or rating plates
Before selecting and using the product, an assessment must be made to
determine whether it is suitable for the application in question. Pepperl+Fuchs has
no influence on the selection and use of this product. Liability is therefore
restricted to the consistent quality of the product.
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warning!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt the device and any connected systems and
plants, or result in their complete failure.

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Safety
EN
The product must be regularly checked and maintained by specialist personnel.
The outcome of inspection and maintenance work must be documented. Only
original spare parts from Pepperl+Fuchs may be used for repairs.
Use only recommended original accessories.see chapter 9.8
The operating company bears responsibility for observing locally applicable
safety regulations.
User modification and or repair are dangerous and will void the warranty and
exclude the manufacturer from any liability. If serious faults occur, stop using the
device. Secure the device against inadvertent operation. In the event of repairs,
return the device to your local Pepperl+Fuchs representative or sales office.
Store the device in the original packaging when not in use. This offers the device
optimal protection against impact and moisture.
Note!
Observe the laws and guidelines applicable to the use or intended purpose. The
device is only approved for appropriate and intended use. Ignoring these
instructions will void any warranty and absolve the manufacturer from any liability.
Note!
Disposal
Electronic waste is hazardous waste. When disposing of the equipment, observe
the current statutory requirements in the respective country of use, as well as local
regulations.

Safety Light Curtain SLCS
Product Description
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4 Product Description
4.1 Use and Application
Features
■Type 4 opto-electronic safety device in accordance with EN IEC 61496-1
■Self-testing
■Obstacle size, depending on type, 14 mm, 30 mm, 60 mm, 90 mm
■Protection field heights up to 1200 mm (SCLS14)
■Protection field heights up to 2400 mm (SLCS30, SLCS60, SLCS90)
■Protection field grid, 100 mm (SLCS14, SLCS30)
■Protection field grid, 300 mm (SLCS60, SLCS90)
■Selectable startup/restart interlock
■Selectable relay monitor
■Simple layout
■IP65 protection
■2 OSSDs (Output Signal Switching Devices)
Description
The SLCS safety light curtain consists of an transmitter and a receiver. The
protection field is formed by infrared light beams sent from the transmitter to the
receiver. The offset between the individual light beams determines the minimum
obstruction size (14, 30, 60 or 90 mm) that can be reliably detected in the entire
protection field range.
The transmitter contains a certain number of transmitter diodes that emit
protective beams. The number of transmitter diodes is determined by the
protection field height and size of the obstacle. The A/B mode function allows the
use of two safety light curtains in close proximity.
The receiver unit detects the transmitted beams, controls the two OSSD safety
outputs and carries out tests to ensure safety.
In addition to the displays behind the front panel of the receiver unit, there is one
pnp output, which indicates operational readiness, a dirty lens, or fault states. If an
internal fault occurs in the receiver unit, this output switches on and off at a
frequency of 5 Hz. If an external fault occurs, this output switches on and off at a
frequency of 1 Hz. If the received signal is too weak (e.g. due to a dirty lens), the
output switches on and off at a frequency of 2.5 Hz.
The test input on the transmitter initiates a test sequence. Activate the input by
applying 24 VDC to the input for a defined period of time.
The relay monitor (RM) and restart (RI) inputs allow monitoring of the switching
elements connected externally to the OSSDs and activation of the startup/restart
interlock function.

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Product Description
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Figure 4.1 Schematic diagram of a detection device
4.2 Indicators and Operating Controls
The transmitter has two LEDs to display its operating status.
The receiver has five LEDs to display its operating status.
Figure 4.2 Displays from the transmitter unit and receiver unit
Transmitter unit
24 V supply 24 V supply
OSSDs
Status / Select RI-RM
Restart Interlock (RI)
Relay Monitor (RM)
Beam Code A/B
Protection
Receiver unit
Test
Beam Code A/B
No. Designation LED color Description
1Power LED Green Transmitter and receiver units operating
2A/B mode,
status Ye llow Indicator flashing at 1 Hz: testing time exceeded or A/B mode input level change
Indicator flashing at 5 Hz: internal fault
3OSSD OFF Red OSSDs switched off
4OSSD ON Green OSSDs switched on
1 Power green
2 Mode A/B, Status yellow
3 OSSD OFF red
4 OSSD ON green
5 Restart/Status yellow
6 Mode A/B yellow
Transmitter unit Receiver unit
1
2
3
5
4
6
1

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4.3 Interfaces and connections
The electrical connections of the safety light curtain are made using M12
connectors. The transmitter has a 4-pin connector and the receiver an 8-pin
connector.
Connect the power supply and the test signal to the transmitter unit. In addition,
the mode can be selected via the A/B mode input.
Connect the fail-safe outputs (OSSD), the status/select output and the inputs for
the startup enable, relay monitor and A/B mode to the receiver unit.
The housing profile is connected internally to +24 V and 0 V with approx. 2.3
MOhm// 33 nF. Internal varistors limit any surges that occur at approx. 85 V. A
separate grounding or connection between the housing and functional ground is
not required.
Tran smit te r :
Figure 4.3 Pin assignment transmitter unit
5Restart/status Yellow On: protection field free: system ready to start
Indicator flashing at 1 Hz: external fault
Indicator flashing at 2.5 Hz: insufficient function
reserve
Indicator flashing at 5 Hz: internal fault
6Mode A/B Yellow Off: mode A
On: mode B
No. Designation LED color Description
124 V DC
2Mode A/B
30 V DC
4Test
1
3
4
2

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Product Description
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Receiver:
Figure 4.4 Pin assignment receiver unit
4.4 Delivery package
The delivery package contains:
■Packaging unit 1: Transmitter
■Packaging unit 2: Receiver
■Operating instructions
■Test rod
Bracket and cable are not included in the delivery package. Visit
http:\\www.pepperl-fuchs.com for a selection of compatible mounting brackets
and recommended cables.
1Restart Interlock (RI)
224 V DC
3Relaismonitor (RM)
4Status / Select RI-RM
5OSSD 1
6OSSD 2
70 V DC
8Mode A/B
1
4
6
7
8
53
2

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Installation
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5 Installation
5.1 Preparation
Safety distance
A minimum distance must be maintained between the protection field and the
hazardous area to ensure potentially dangerous movements are brought to a stop
before there is contact with a person.
Figure 5.1 Minimum distance between protection field and hazardous area
This distance is calculated from the lag time of the machine, the response time of
the safety system, and the speed of movement of the person entering the
hazardous area (EN ISO 13855).
To comply with the necessary distances in the event that the protection field
spreads, please refer to Table 1 of EN ISO 13855 to check the minimum distance
for a vertically located protection field. If the table gives you a reading of 0,
determine the minimum distance with the following formula:
S = K x T + C
The following applies to a protection field installed perpendicular to the
hazardous area:
SMinimum safety distance in mm,
i.e., the distance between hazardous area and protection field
KConstant in mm/s for the speed of approach, based on the detection capacity of the
sensor
TTotal response time of the safety device in s (T = t1+t2)
t1Response time of the safety device see chapter 9.5
t2Machine lag time
CAdditional distance in mm. See table
Number of
beams/resol
ution
14 mm 30 mm 60 mm 90 mm
0 mm 128 mm 850 mm 850 mm
For arrangements other than a perpendicular arrangement of the protection field, see
also EN ISO 13855.
Danger zone
Minimum interval S
Sending unit
Protective field
Receiving unit

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Notes on setting up safety light curtains
The safety device must be arranged in such a manner that it is impossible to reach
over, reach under, or walk behind the protection field. If the distance from the
safety device is too great, additional safety equipment must be put in place (see
illustration below).
Reaching over
The user must not be able to reach over the protection field and into the
hazardous area (A: protection field, B: mechanical protection).
Walking behind
The machine operator must not be able to walk between the light curtain and into
the hazardous area (A: protection field, B: mechanical protection).

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5.2 Mounting
Various brackets are available for securing the safety light curtain (see chapter
9.8).
Mounting
1. Align the transmitter and receiver so that they are parallel with one another and
at the same height.
2. Align the transmitters and receivers parallel with one another.
3. The function reserve indicator helps with correct alignment.
When installing the safety light curtain in a danger zone, a minimum distance must
be maintained between the protection field and the danger zone. This distance
will guarantee that movements that pose a danger to a person can be brought to a
stop before that person comes in contact with the source of danger.
The distance is calculated from the lag time of the machine, the response time of
the safety light curtain and the speed of movement of the person entering the
hazardous area (EN ISO 13855, EN ISO 13857).
Vertical approach
Figure 5.2 Explanation of the safety distance in a vertical arrangement of the protective
field
Where K = 2000 mm/s and C = 0 mm, e.g., for SLCS14…
or C = 128 mm, e.g., for SLCS30...
the calculation formula for a distance S of 105 mm up to and including 500 mm is:
S = 2000 mm/s * (t1+ t2) + C
S = 1600 mm/s * (t1+ t2) + C
S must be at least 500 mm. Lower results must be corrected to a minimum
distance of 500 mm.
Distance S
Protective field
Danger
zone
Note!
If S is greater than 500 mm, then K = 1600 mm/s must be used for calculations:

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Example: vertical arrangement
t1= 50 ms
t2= 300 ms
Hand protection C = 128 mm
S = 2000 mm/s * (350 * 10-3 s) + 128 mm
S = 700 mm + 128 mm = 828 mm
As S is > 500 mm, a smaller value can also be determined:
S = 1600 mm/s * (350 * 10-3 s) + 128 mm = 688 mm
The minimum distance between the protection field and hazardous area must
therefore be 688 mm.
Parallel approach
Figure 5.3 Explanation of the safety distance in a horizontal arrangement of the
protective field
If the safety light curtain is aligned in a horizontal position, the safety distance S
will also depend on the height of the light curtain above the floor. The maximum
height H must not exceed 1000 mm.
This must be taken into consideration in the risk analysis, otherwise additional
protection will be required.
The safety distance is calculated as follows:
S = 1600 mm/s * (t1+ t2) + (1200 mm - 0.4 H)
(1200 mm - 0.4 H) 850 mm is also required.
Distance S
H (height above ground)
Protective field
Danger
zone
Note!
If H is greater than 300 mm, there is a risk that access underneath the safety light
curtain will be possible.

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5.3 Reflection
Ensure that there are no reflective objects within the transmitter or receiver path
that could deflect the beams around an obstruction (EN 61496-2).
Only in this way can you ensure that an object will be reliably detected by a beam
in the light grid. The minimum distances are listed in the table.
Minimum Distance Between Protection Field and Reflective Surfaces
Reflecting object outside beam area
Obstacle
Sending unit Receiving unit
Minimum interval a
Note!
When positioning the light grid, ensure that a minimum distance to reflecting
objects or surfaces is maintained. This distance from the protection field must be
maintained on all sides.
Protection field width/range [m] Minimum distance [mm]
0,2 - 3,0 135
4,0 175
5,0 220
6,0 265
8,0 350
10 450
15 660
20 880

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5.4 Connection and Operating Mode Setting
Both the power supply and the system settings can be connected to the
transmitter and receiver. The following operating mode settings are also available:
■Startup interlock operating mode
■Relay monitor operating mode
■A/B operating mode
Startup interlock operating mode
The startup/restart interlock ensures that after the power supply has been turned
on, or after an interruption in the protection field, the "ready to start" status is
signaled when the protection field is free and the startup enable has to be
activated in order for the safety light curtain to switch on the OSSDs.
An NC contact between the restart and + 24 VDC input is required to trigger the
startup/restart interlock. The startup/restart interlock function does not work if the
restart input is connected to the status/select output. If the input is not connected,
the startup/restart interlock is activated (see chapter 5.4.4).
Relay monitor operating mode
The relay monitor input monitors the switching positions of the downstream
relays. If the switching position of the relay does not match the signal from the
OSSDs, the system switches to safe mode. The status LED indicates that safe
mode is active.
NC contacts from the switching elements must be placed between 24 VDC and
the relay monitor input in order to activate the relay monitor. The relay monitor
function is deactivated if the relay monitor input is connected to the status/select
output.
Note!
When the input is open, the startup/restart interlock is activated.
Note!
The function can be activated or deactivated at the 8-pin connector of the receiver
SLCS.
Note!
An open relay monitor input results in a fault. The yellow indicator LED flashes at a
frequency of 1 Hz in the event of a fault.
Note!
The function can be activated or deactivated at the 8-pin connector of the receiver
SLCS.

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A/B operating mode
Operating mode A or operating mode B must be configured both on the
transmitter and on the receiver. The modes are used to prevent mutual
interference from adjacent SLCS safety light curtains (see chapter 6.2).
The operating mode is selected by connecting the A/B mode input. When
connected to 0 V (recommended) or an open input, the safety light curtain
operates in mode A.
5.4.1 Signal outputs on the receiver unit
Status/Select RI-RM output
The output indicates the same states as the restart/status indicator.
This signal output indicates operational readiness and is active when the
protection field is free and startup enable can be activated in order to switch on
the OSSD. Internal or external faults and a dirty lens, are also signaled at this
output.
If an external fault occurs, the output switches on and off at a frequency of 1 Hz.
The following faults may be the cause:
■Relay monitor faulty
■Low supply voltage
■Short or crossed circuits at the OSSD outputs
■Level change at the mode input during operation
Internal faults cause the output to switch on and off at a frequency of 5 Hz.
If the safety light curtain is not adjusted correctly or the front lenses are not clean,
the output switches on and off at a frequency of 2.5 Hz.
The output is also used to define the preset operating mode during startup.
Bypassing this output to the restart and/or relay monitor inputs deactivates the
relevant operating mode.
OSSDs
The receiver has two safe outputs, which are short circuit and cross circuit proof.
The OSSDs switch off as soon as a light beam is interrupted. The switching time
specifications appear in chapter (see chapter 9.5).
Note!
If the A/B mode input is open, the system operates in mode A.

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5.4.2 Signal Inputs on the Transmitter Unit
Test input
Connect the test input to 24 VDC via an NC contact. The test function is triggered
by opening the contact.
The test input is used to start a complete test of the safety light curtain. During this
process, the OSSDs are switched off and all system components are checked.
Fault messages from the transmitter unit are acknowledged by initiating a test.
The time constraints of the test signal must be maintained for a test to be
successful ( see Figure 5.4 on page 18). The time offset between the test
request and the response in the OSSDs is a minimum of 6 ms for an SLCS30-600
safety light curtain, for example, and a maximum of 18 ms. An actuation time of
the test input less than 0.02 s or greater than 2.4 s switches the transmitter to a
fault state.
Figure 5.4 Graphs of the OSSD switching states when initiating a test or reset
Note!
During operation without a startup/restart interlock, the test time must be limited to
150 ms.
Note!
A complete test is also carried out when the operating voltage is switched on. This
also applies to the receiver unit, which does not have a test input.
Note!
In the event of an error, an error reset can be triggered by activating the input for
between 1.2 s and 2.4 s.
Min. 0,4 x response time
Max. 0,8 x response time
Min. 0,4 x response time
Max. 1,2 x response time
min. 20 ms / max. 2,4 s
high
low
ON
OFF
OSSDs
Test