Operating instructions
Safety bumpers
SSG-SB-L
7 Appendix
7.1 Wiring example .......................................11
8 EU Declaration of conformity
1. About this document
EN
Operating Instructions . . . . . . . . . . .pages 7 to 12
Original
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Content
1 About this document
1.1 Function ..............................................7
1.2 Target group: authorised qualied personnel ..................7
1.3 Explanation of the symbols used ...........................7
1.4 Appropriate use ........................................7
1.5 General safety instructions ...............................7
1.6 Warning about misuse ...................................8
1.7 Exclusion of liability .....................................8
2 Product description
2.1 Ordering code .........................................8
2.2 Special versions........................................8
2.3 Purpose ..............................................8
2.4 Determination of the after-travel ...........................8
2.5 Technical data .........................................9
2.6 Safety classication .....................................9
2.7 Chemical resistance.....................................9
2.8 Packaging ...........................................10
3 Mounting
3.1 General mounting instructions ............................10
3.2 Dimensions ..........................................10
4 Electrical connection
4.1 General information for electrical connection.................11
5 Set-up and maintenance
5.1 Functional testing......................................11
5.2 Maintenance .........................................11
6 Disassembly and disposal
6.1 Disassembly..........................................11
6.2 Disposal .............................................11
1.1 Function
This operating instructions manual provides all the information you
need for the mounting, set-up and commissioning to ensure the safe
operation and disassembly of the safety switchgear. The operating
instructions must be available in a legible condition and a complete
version in the vicinity of the device.
1.2 Target group: authorised qualified personnel
All operations described in this operating instructions manual must
be carried out by trained specialist personnel, authorised by the plant
operator only.
Please make sure that you have read and understood these operating
instructions and that you know all applicable legislations regarding
occupational safety and accident prevention prior to installation and
putting the component into operation.
The machine builder must carefully select the harmonised standards
to be complied with as well as other technical specifications for the
selection, mounting and integration of the components.
1.3 Explanation of the symbols used
Information, hint, note:
This symbol is used for identifying useful additional information.
Caution: Failure to comply with this warning notice could
lead to failures or malfunctions.
Warning: Failure to comply with this warning notice could
lead to physical injury and/or damage to the machine.
1.4 Appropriate use
The products described in these operating instructions are developed to
execute safety-related functions as part of an entire plant or machine. It
is the responsibility of the manufacturer of a machine or plant to ensure
the correct functionality of the entire machine or plant.
The safety switchgear must be exclusively used in accordance with
the versions listed below or for the applications authorised by the
manufacturer. Detailed information regarding the range of applications
can be found in the chapter "Product description".
1.5 General safety instructions
The user must observe the safety instructions in this operating
instructions manual, the country specific installation standards as well
as all prevailing safety regulations and accident prevention rules.
Further technical information can be found in the Schmersal
catalogues or in the online catalogue on the Internet:
www.schmersal.net.
The information contained in this operating instructions manual is
provided without liability and is subject to technical modifications.
There are no residual risks, provided that the safety instructions as well
as the instructions regarding mounting, commissioning, operation and
maintenance are observed.
EN
7
Operating instructions
Safety bumpers
SSG-SB-L
1.6 Warning about misuse
In case of improper use or manipulation of the safety switchgear, personal hazards or damages to machinery or plant
components cannot be excluded. The relevant requirements
of the standard ISO 14119 must be observed.
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages
resulting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary
repairs, conversions and modifications to the device are strictly
forbidden; the manufacturer shall accept no liability for damages
resulting from such invasive work, arbitrary repairs, conversions and/or
modifications to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SSG-SB-L➀-➁-➂-➃-➄-L
No. Option Description
➀
K Skinning with kevlar
200 … 3000 Width in mm, max. 3 m
➂
80 … 300 Height in mm, max. 0.8 m
➃
100 … 600 Depth in mm, max. 0.6 m
➄
SW Color black
➁
SWGB Color black with yellow stripes
SWGBV Color black with yellow stripes V-style
➅
➅
Default skinning
Cable length (2.0 m standard)
The user must evaluate and design the safety chain in
accordance with the relevant standards and the required
safety level.
If multiple safety components are wired in series, the
Performance Level to ISO 13849-1 will be reduced due to the
restricted error detection under certain circumstances.
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
2.4 Determination of the after-travel
The following diagrams (Fig. 1 to 2) show the force-travel relation of the
safety bumper at a bumper (size 1000 mm × 150 mm × 150 mm) at the
specified actuating speed V.
The calculated stopping distance of the machine must be
smaller than or equal to the after-travel SV of the bumper.
The after-travel of the bumper is calculated by means of the
deformation path SG up to the specified reference force FG
minus the actuating travel SB.
Calculation of the after-travel: SV = SG – S
Key
SBActuating travel
SVAfter-travel
SGDeformation path
FBLowest actuating force
FGReference force
N
B
Not all component variants, which are possible according to this order
code, are available.
Only if the information described in this operating instructions
manual are realised correctly, the safety function and therefore
the compliance with the Machinery Directive is maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Purpose
Safety bumpers are used for the protection of man and objects on
machinery and plants with hazardous movements. They are especially
destined for the protection of crushing and shearing points on moving
machine parts and automatically closing doors and gates as well as the
protection of the tracks of automatic guided vehicles (AGV's).
The bumper consists of a foam skinned body with integrated contact
elements with 2 NC contacts (power to unlock principle, dual-channel).
If the sensitive bumper is actuated, the NC contacts of the contact
elements are opened. The connected safety-monitoring module stops
the hazardous movement. The entire safety system (guard system
for person detection in accordance with Appendix IV of the Machinery
Directive) comprises bumpers(s) and a safety relay module from series
SRB301ST-24V-(V2) or SRB301ST-230V. The safety bumpers of the
SSG-SB-L… series must not be used without safety-monitoring module.
mm
Fig. 1
V = 10 mm/s
SB = 27 mm with FB = 35 N
SV = 91 mm with FG = 250 N
SG = 118 mm
The bumpers are not suitable for finger protection.
8
EN
Operating instructions
MT
Bdxxhs/h3600
0,1 x n
op
t
cycle
Safety bumpers
SSG-SB-L
N
Fig. 2
V = 100 mm/s
SB = 27 mm with FB = 48 N
SV = 90 mm with FG = 250 N
SG = 117 mm
N
mm
2.6 Safety classification
Safety bumpers in combination with SRB301ST-24V-(V2)
or SRB301ST-230V safety monitoring module
Standards: ISO 13849-1
PL: d
Control Category: 3
nop (assumed): 36,500 actuations / year
PFH: > 3.16 × 10
–7
Service life: 20 years
Safety-monitoring module
SRB301ST-24V-(V2) or SRB301ST-230V
Standards: ISO 13849-1, IEC 61508, IEC 60947-5-1
PL: STOP 0: up to e
Control category: STOP 0: up to 4
DC: STOP 0: 99% (high)
CCF: > 65 points
SIL: STOP 0: up to 3
Service life: 20 years
B
value (for one channel): Low voltages range 20%: 20,000,000
10D
40%: 7,500,000
60%: 2,500,000
80%: 1,000,000
Maximum load 100%: 400,000
TF
D
10Dopop
n
op
For an average annual demand rate of nop = 126,720 cycles per year,
Performance Level PL e can be obtained at maximum load.
nop = average number of activations per year
dop = average number of operating days per year
hop = average number of operating hours per day
t
= average demand rate of the safety function in s
cycle
(e.g. 4 × per hour = 1 × per 15 min. = 900 s)
mm
Fig. 3
V = 500 mm/s
SB = 39 mm with FB = 70 N
SV = 75 mm with FG = 250 N
SG = 114 mm
2.5 Technical data
Standards: ISO 13856-3
Surface material: polyurethane
Material bumper body: PUR soft foam
Protection class: IP54
Ambient temperature: 0 °C … +55 °C
Actuating force: < 600 N with test piece 45 × 400 mm,
90° with regard to the mounting surface
Cable: 4 × 0.34 mm²
Cable length: Cable length (2.0 m standard)
Response time: ≤ 41 ms, test speed 100 mm/s
After-travel SV depending on the actuating speed V
(see Fig. 1 to 3 under 2.4)
Active switching area: ± 45°
Mechanical life: > 100,000 operations
Admissible load: 1,500 N / 80 mm Ø in actuation direction
(Determined values can vary depending on the application-specific
parameters hop, dop and t
as well as the load.)
cycle
2.7 Chemical resistance
For the here-after specified resistances, an intact skinning of the
bumper is pre-requisite (room temperature 23°C).
Skinning PUR Skinning PUR
Acetone ± Methyl alcohol +
Formic acid – Caustic soda solution 10% +
Ammonia 10% + Sulphuric acid 10% +
Gasoline ± Sulphuric acid 50% ±
Brake fluid – Hydrochloric acid 10% +
Diesel oil + Sanitary cleaner +
Acetic acid 10% + Washing liquid +
Ethyl acetate – Carbon tetrachloride ±
Ethyl alcohol + Rolling oil +
Gear oil + Water +
Household detergent + Hydrogen peroxide +
Isopropanol +
Explanation of the symbols + = resistant
± = conditionally resistant
– = non-resistant
The specifications mentioned in the resistance table are the outcome
of meticulous lab tests, which have been conducted to the best of our
knowledge and belief. Basically, the suitability of the bumper for the
specific application must be tested by practical tests executed by the
customer.
EN
9
Operating instructions
Safety bumpers
SSG-SB-L
2.8 Packaging
The bumpers are usually supplied in disposable cardboard boxes.
For extended lengths, reinforced packaging material is used. During
the transport and storage, it imperatively must be observed that the
bumpers are not exposed to humidity or permanent pressure. The
bumpers always must be stored horizontally on the side of fixation.
Avoid depositing heavy goods on the packaging. Carefully open and
remove the packaging material to avoid damages to the bumpers and
the feed cables.
3. Mounting
3.1 General mounting instructions
The safety bumper is installed on a level machine base.
When designing the protection, the stopping distance and
manipulation of the guard system in particular must be taken
into account. The adequacy of dimensioning and mounting
must ensure that the operators are protected from hazardous
movements. Bumpers must not be used as storage areas or
climbing aids.
Two slot strips are provided over the entire length of the bumper for the
fixation of the bumper. The bumper is fixed by means of the hexagonal
M6 screws (ISO 4018) and/or hexagonal M6 nuts (ISO 4032) and
6.4 washers (ISO 7090) inserted in both slot strips (Fig. 4). A fixing
screw must be provided in each slot strip at least every 250 mm. The
mounting surface imperativel must be plane and clean. Any mounting
position, the bumpers however must not be used in the direct sphere of
influence of hot chips, heavy or sharp-edged workpieces.
3.2 Dimensions
All measurements in mm.
The bumpers must be fitted free of torsion.
Fig. 4
For the connecting cable, a feedthrough with at least Ø 12 mm must be
provided at the corresponding place of the mounting surface.
The feedthrough must be procured so that damage to the connecting
cable is excluded.
All cables must be protected against damages (crushing, shearing, etc.).
When multiple safety bumper are arranged adjacently, their butts must
be joined. Then realise the electrical connection of the safety bumper
(refer to chapter 4 Electrical connection).
Fig. 5
Key
a) B = 100 … 3000 mm
b) Cable output
c) T = 100 … 600 mm
d) H = 80 … 300 mm
e) H minus 16 mm
The active actuating surface of the bumper is determined by the sizes
B and H.
10
EN
Operating instructions
Safety bumpers
SSG-SB-L
4. Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
The safety bumpers are connected through the permanently connected
four-wire sheathed cable. The individual cables are marked with
the digits 1 … 4 (Fig. 6). To protect larger surfaces, multiple safety
bumpers can be connected together to build a large surface. Maximum
6 bumpers may be connected to a safety-monitoring module. The
maximum cable length to the safety-monitoring module must not
exceed 200 m. To this effect, individual safety bumpers are wired in
series (Fig. 7). More information about the connection of the safety
bumpers can be found in the wiring example in appendix as well
as in the operating instructions of the SRB301ST-24V-(V2) or
SRB301ST-230V safety-monitoring module.
Fig. 6
7. Appendix
7.1 Wiring example
The application examples shown are suggestions. They however do not
release the user from carefully checking whether the switchgear and its
set-up are suitable for the individual application.
Fig. 8: Wiring example with SRB301ST-24V-(V2)
a) Logic
J = Reset button
S = Feedback circuit
Fig. 7
5. Set-up and maintenance
5.1 Functional testing
The safety function of the safety bumper must be tested. The following
conditions must be previously checked and met:
1. Firm and non-deforming fixation of the safety bumper to the floor
2. Fitting and integrity of the power cable
3. Actuate the bumper to check whether the output relays of the safety-
monitoring module are disabled and stop the hazardous movement
of the machine
5.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
1. Check fitting of the safety bumper
2. Check the safety bumper and especially the skin for damages
3. Remove all debris (dust, chips, etc.) from the safety bumper
4. Check the cable for damages
5. Functional test to chapter 5.1
recommended test interval: daily functional test
Maintenance: Please observe that the safety function must
be triggered at least once a year to test the system!
Damaged or defective components must be replaced.
Fig. 9: Wiring example with SRB301ST 230V
a) Logic
J = Reset button
S = Feedback circuit
6. Disassembly and disposal
6.1 Disassembly
The safety bumper must be disassembled in de-energised condition
only.
6.2 Disposal
The safety bumper must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations.
Fig. 10: Bumper series-wiring
EN
11
Operating instructions
Safety bumpers
8. EU Declaration of conformity
EU Declaration of conformity
SSG-SB-L
Original K.A. Schmersal GmbH & Co. KG
We hereby certify that the hereafter described components both in their basic design and construction conform
to the applicable European Directives.
Name of the component: SSG-SB-L
Type: See ordering code
Description of the component: Pressure-sensitive protective device
Relevant Directives: 2006/42/EG
Applied standards: DIN EN ISO 13856-3:2013
Möddinghofe 30
42279 Wuppertal
Germany
Internet: www.schmersal.com
Safety bumpers
2011/65/EU
Machinery Directive
RoHS-Directive
Person authorised for the compilation
of the technical documentation:
Place and date of issue: Wuppertal, 04 September 2018
SSG-SB-L-D-EN
The currently valid declaration of conformity can be
downloaded from the internet at www.schmersal.net.
K. A. Schmersal GmbH & Co. KG
Möddinghofe 30, D - 42279 Wuppertal
Postfach 24 02 63, D - 42232 Wuppertal
Oliver Wacker
Möddinghofe 30
42279 Wuppertal
Authorised signature
Philip Schmersal
Managing Director
Phone: +49 - (0)2 02 - 64 74 - 0
Telefax: +49 - (0)2 02 - 64 74 - 1 00
E-Mail: info@schmersal.com
Internet: http://www.schmersal.com
12
EN
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