Leuze electronic S20 Series User manual
S20
Safety Switches
Original operating instructions
EN 2011/09 - 607260
We reserve the right to
make technical changes
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1 About this document............................................................................................ 5
1.1 Other applicable documents ................................................................................................5
1.2 Used symbols and signal words ..........................................................................................6
2 Safety................................................................................................................... 7
2.1 Approved purpose and foreseeable improper operation......................................................8
2.1.1 Proper use.....................................................................................................................................8
2.1.2 Foreseeable misuse ......................................................................................................................9
2.2 Competent personnel.........................................................................................................10
2.3 Responsibility for safety.....................................................................................................10
2.4 Exemption of liability ..........................................................................................................10
3 Device description ............................................................................................. 11
4 Functions ........................................................................................................... 14
5 Applications ....................................................................................................... 15
6 Mounting............................................................................................................ 16
6.1 Adjusting the deflection head.............................................................................................16
6.2 Mounting the Safety Switch ...............................................................................................17
6.3 Mounting the actuator ........................................................................................................18
7 Electrical connection.......................................................................................... 20
7.1 Connecting the contact block.............................................................................................20
8 Setting the device into service........................................................................... 24
9 Testing............................................................................................................... 25
9.1 To be performed prior to the initial start-up by competent personnel.................................25
9.2 To be performed periodically by competent personnel......................................................25
9.3 To be performed daily by the operating personnel ............................................................26
10 Cleaning............................................................................................................. 27
11 Disposing........................................................................................................... 28
12 Service and support........................................................................................... 29
13 Accessories ....................................................................................................... 30
13.1 Accessory dimensional drawings.......................................................................................31
14 Technical data ................................................................................................... 35
4 S20 Leuze electronic
15 EC Declaration of Conformity............................................................................ 38
About this document
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1 About this document
1.1 Other applicable documents
The information on the S20 Safety Switch is divided into two documents. Docu-
ment "S20 Application information" contains only the most important safety
notices.
ªFor the safe implementation, testing and operation, download document S20
Safeimplementationandoperationfrom Leuze website.
Table 1.1: Documents on the S20 Safety Switch
Purpose and target group Title Source
Detailed information for all users S20 Safe implementation
and operation (this docu-
ment)
On the Internet, download
from Leuze website
Basic information for technicians
and operating company S20 Application informa-
tion Print document part
no. 607234 included in the
delivery contents of the
product
About this document
6 S20 Leuze electronic
1.2 Used symbols and signal words
Table 1.2: Warning symbols and signal words
Table 1.3: Other symbols
Symbol for dangers
NOTICE Signal word for property damage
Indicates dangers that may result in property damage if the measures for
danger avoidance are not followed.
CAUTION Signal word for minor injury
Indicates dangers that may result in minor injury if the measures for dan-
ger avoidance are not followed.
WARNING Signal word for severe injury
Indicates dangers that may result in severe or fatal injury if the measures
for danger avoidance are not followed.
DANGER Signal word for life-threatening danger
Indicates dangers that will result in severe or fatal injury if the measures
for danger avoidance are not followed.
Symbol for tips
Text passages with this symbol provide you with further information.
ªSymbols for action steps
Text passages with this symbol instruct you to perform actions.
xxx Placeholder in the product description for all variants
Safety
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2 Safety
Before using the Safety Switch, a risk evaluation must be performed according to
valid standards (e.g. EN ISO 12100-1, EN ISO 13849-1, EN ISO 14121). For
mounting, operating and testing, document S20 Safe implementation and opera-
tion, application information as well as all applicable national and international
standards, regulations, rules and directives must be observed. Observe and print
out relevant and supplied documents and distribute to the affected personnel.
The following standards apply for the risk evaluation at the protective device prior
to using the Safety Switch:
• EN ISO 14121, Safety of machinery, risk evaluation
• EN ISO 12100-1, Safety of machinery
• EN ISO 13849-1, Safety-related parts of control systems
The realizable category of integration in control circuits acc. to EN ISO 13849-1 is
dependent on the used contact block, wiring and mechanical conditions.
In particular, the following national and international legal regulations apply for the
start-up, technical inspections and work with Safety Switch:
• Machinery directive 2006/42/EC
• Low voltage directive 2006/95/EC
• Use of work equipment directive 89/655 EEC
• Safety regulations
• Accident-prevention regulations and safety rules
• Ordinance on Industrial Safety and Health and Labor Protection Act
• Device Safety Act
For safety-related information you may also contact the local authorities (e.g.,
industrial inspectorate, employer's liability insurance association, labor inspec-
torate, labor protection and health authority).
Safety
8 S20 Leuze electronic
2.1 Approved purpose and foreseeable improper operation
2.1.1 Proper use
• The Safety Switch must only be used after it has been selected in accor-
dance with the respectively applicable instructions and relevant standards,
rules and regulations regarding labor protection and safety at work, and
after it has been installed on the machine, connected, commissioned, and
checked by a competent person.
• When selecting the Safety Switch it must be ensured that its safety-related
capability meets or exceeds the required performance level PLrascertained
in the risk assessment.
• It must be in perfect condition and inspected regularly.
• The switching process must only be triggered by an actuator approved for
this Safety Switch that is connected to the moveable guard in a non-detach-
able and tamperproof manner.
S20 SafetySwitches mustbe connected in such a way that a dangerous state can
only be activated while the protective device is closed and so that the dangerous
state stops upon opening of the protective device. It must not be used if the point
of operation can be accessed during the lag time before the dangerous state has
ended.
Connection conditions:
• the dangerous state can only be activated while the protective device is
closed
• opening the protective device while the machine is running triggers a stop
command and ends the dangerous state
WARNING
A running machine can cause severe injuries!
ªMake certain that, during all conversions, maintenance work and inspections,
the system is securely shut down and protected against being restarted
again.
Safety
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Furthermore, the S20 Safety Switch must not be used under the following condi-
tions:
• high concentration of dust particles in the surrounding area
•rapidly changing ambient temperature (leads to condensation)
• in the event of strong physical shocks
• in explosive or easily flammable atmospheres
• the mounting locations are not sufficiently stable
• the safety of multiple persons is dependent on the function of this Safety
Switch (e.g. nuclear power plants, trains, aircraft, motor vehicles, incinera-
tors, medical devices)
Handling the Safety Switch:
ªObserve the permissible environmental conditions for storage and operation
(see chapter 14).
ªImmediately replace damaged Safety Switch according to these instructions
(see chapter 6).
ªUse cable gland, insulation materials and connecting wires of the appropriate
protection rating.
ªProtect the Safety Switch from penetrating foreign bodies (e.g. shavings, sand
and blasting agent).
ªBefore performing painting work, cover the actuation slot, actuator and name
plate.
ªImmediately clean any contamination from theSafety Switch that impacts func-
tion according to these instructions.
ªMake no structural changes to the Safety Switch.
ªThe Safety Switch must be exchanged after a maximum of 20 years.
2.1.2 Foreseeable misuse
Any use other than that defined under the "approved purpose" or which goes
beyond that use of the Safety Switch is considered improper use!
E.g. - using without non-detachably mounted actuator
• looping into the safety circuit parts that are not relevant to safety
• using the switch as a limit stop
For machines with longer slowdowns, a Safety Locking Device must be used.
Safety
10 S20 Leuze electronic
2.2 Competent personnel
Prerequisites for competent personnel:
• suitable technical training
• knows the rules and regulations for labor protection, safety at work and
safety technology and can assess the safety of the machine
• knows the instructions for the Safety Switch and the machine
• was instructed by the responsible individuals on the mounting and operation
of the machine and of the Safety Switch
2.3 Responsibility for safety
Manufacturer and operating company must ensure that the machine and imple-
mented Safety Switch function properly and that all affected persons are
adequately informed and trained.
The type and content of all imparted information must not lead to unsafe actions
by users.
The manufacturer of the machine is responsible for:
• safe machine construction
• safe implementation of the Safety Switch
• imparting all relevant information to the operating company
• adhering to all regulations and directives for the safe starting-up of the
machine
The operating company is responsible for:
• instructing the operating personnel
• maintaining the safe operation of the machine
• adhering to all regulations and directives for labor protection and safety at
work
• regular testing by competent personnel
2.4 Exemption of liability
Leuze electronic GmbH + Co. KG is not liable in the following cases:
• Safety Switch is not used as intended
• safety notices are not adhered to
• mounting and electrical connection are not properly performed
• reasonably foreseeable misuse is not taken into account
Device description
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3 Device description
The Safety Switch of the S20 series is an electro-mechanical switching device in
a housing made of glass-fibre-reinforced and non-combustible plastic; the device
satisfies protection rating IP 67. The standard design facilitates easy replacement.
By means of the funnel-shaped insertion opening, the actuator self-centers, even
if the door is slightly misadjusted.
Modelswith different contact sets with screw terminals or M12 plug connection as
well as 10 N or 30 N extraction force are available.
1 Deflection head
2 Dust cover
3 Insertion opening for actuator
4 Housing cover
5 Name plate (connection data, production code and year of manufacture)
1
2
3
4
5
1
2
3
4
5
Device description
12 S20 Leuze electronic
Table 3.1: S20 Safety Switch
Figure 3.1: Dimensions of S20-P3C1-M20-FH, S20-P1C1-M20-FH30 and S20-
P4C1-M20-FH in mm
Figure 3.2: Dimensions of S20-P4C1-M12-FH in mm (M12 plug dimensions)
Article Part No. Description
S20-P3C1-M20-FH 63000100 2NC, 1 cable entry
S20-P1C1-M20-FH 63000101 1NC + 1NO, 1 cable entry
S20-P4C1-M20-FH 63000103 2NC + 1NO, 1 cable entry
S20-P1C3-M20-LH 63000102 1NC + 1NO, 3 cable entries
S20-P4C3-M20-LH 63000104 2NC + 1NO, 3 cable entries
S20-P4C1-M20-FH30 63000105 2NC + 1NO, 1 cable entry, 30 N extraction force
S20-P4C1-M12-FH 63000106 2NC + 1NO, 1 cable entry / M12 plug
30.8
24.2
93
3
34
30.8
20
22
7.5
7.5
41.5
51.5
14.2
4.2x7.2
30.8
14.2
M12x1 23
13.3
Device description
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Figure 3.3: Dimensions of S20-P1C3-M20-LH and S20-P4C3-M20-LH in mm
The deflection head can be turned in 90° increments and set to 5 approach direc-
tions. A selection of different actuators ensures that the Safety Switch can be
mounted in any position.
Figure 3.4: Approach directions
50.5 77.5
5.5
5.5
7.518
52.2
40
30
90.5
17.8
7.6
14.1
30
31.6
9.1
Functions
14 S20 Leuze electronic
4 Functions
The Safety Switch signals to the safety switching device whether the protective
device is closed. Moving the actuator in closes the safety contacts; moving the
actuatorout forcesthe safetycontacts toopen (e.g. upon opening of the protective
device). As a result, the machine can only be switched on if the protective device
is closed.
Applications
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5 Applications
The Safety Switch can be used for e.g. the following protective devices:
• turning or swiveling moveable guards
• laterally moveable protective gratings or sliding gates
• protective flaps
Mounting
16 S20 Leuze electronic
6 Mounting
6.1 Adjusting the deflection head
ªLoosen the 2 screws on the deflection head.
WARNING
Severe accidents may result if the Safety Switch is not mounted properly!
The protective function of the Safety Switch is only ensured if appropriately and
professionally mounted for the respective, intended area of application.
ªMounting may only be performed by competent personnel.
ªObserve standards, regulations and these instructions.
ªProtect the housing and deflection head from materials penetrating the enclo-
sure (environmental conditions (see chapter 14)).
ªTest to ensure proper function.
Mounting
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ªLift the deflection head and turn in the desired approach direction.
ªTighten the 2 screws on the deflection head with 0.7–0.9Nm.
ªClose unused opening with the dust cover.
6.2 Mounting the Safety Switch
Prerequisites for mounting:
• deflection head has been set
• fully assembled
ªSelect the mounting location so that the following conditions are satisfied:
• Safety Switch and actuator can be well matched to one another mechani-
cally and can be permanently mounted
• accessible to qualified personnel for testing and replacement
• difficult to access by operating personnel while the protective device is open
Mounting
18 S20 Leuze electronic
ªPosition washers and screw down Safety Switch with 2–3Nm.
6.3 Mounting the actuator
Prerequisites for proper function:
• actuator is not deformed or damaged
• actuator is suitable for the Safety Switch
Proper function is ensured only with original accessories (see chapter 13).
NOTICE
The Safety Switch may be damaged if mounted improperly!
ªUse separate mechanical limit stop for the moving part of the protective
device.
ªAlign actuator so that it does not hit or rub against the edges of the insertion
opening.
Mounting
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ªAlign actuator.
Play for the actuator in the closed state: 0.5–4.5mm.
ªSecure actuator with rivets or tamperproof screws so that it cannot be
detached.
Wrong Correct
0,5 ... 4,5 mm
Electrical connection
20 S20 Leuze electronic
7 Electrical connection
7.1 Connecting the contact block
Prerequisites for the electrical connection:
• temperature stability of the cable insulation material must be greater than
the maximum temperature of the housing (see chapter 14)
• cable gland with appropriate protection rating
• maximum current load is observed (see chapter 14)
Figure 7.1: Contact block 2NC (S20-P3xxx)
Figure 7.2: Contact block 1NC + 1NO (S20-P1xxx)
WARNING
Serious accidents may result if the electrical connection is faulty!
ªElectrical connection may only be performed by competent personnel.
DANGER
Risk of death by electric shock!
ªInterrupt the voltage supply to the Safety Switch.
22
21
12
11
22
21
12
11
22
21
14
13
22
21
14
13
Electrical connection
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Figure 7.3: Contact block 2NC + 1NO (S20-P4xxx)
Figure 7.4: Pin assignment of the 8-pin M12 plug (S20-xxx-M12-xxx)
ªUnscrew the housing cover.
ªConnect the contact block according to the circuit diagram.
22
21
12
11
22
21
12
11
34
33
34
33
3
4
5
6
7
8
1
176
5
4
3
2
8
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