an introduction to machinery safety essentials · machinery specific standards bs en iso 12100:2010...
TRANSCRIPT
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2015 © TÜV SÜD Product Service Slide 128/06/2017
An Introduction to
Machinery Safety
Essentials
Presented by Lee Ray
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Who am I?
Name Lee Ray
Title Key Accounts Manager
Employer TÜV SÜD Product Service
Experience Almost seven years in the field of Machinery Safety Compliance
History Apprentice Trained Multi Skilled Engineer. Graduate Member of IOSH. Started with
Laidler Associates in Sept 2010 which was taken over by TÜV SÜD Product Service.
Left for a short period to take a position with Siemens Metal Technologies as Product
Safety Coordinator.
Telephone 07584 488771
E-mail: [email protected]
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Facilities:
Training Room.
Teas / Coffees.
Lunch.
Emergency Measures.
Toilets.
Mobile Phones.
Information
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Machinery Safety Essentials
TÜV SÜD Product Service Slide 4CE Marking and Electrical Safety Workshop25/04/2017
By the end of this Workshop the
participants will:
• Have a understanding of the
Machinery Directive requirements.
• Understand the requirement to
PUWER assess equipment.
• Know the requirements for Safety
Related Control Systems &
Functional Safety
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An Introduction to Machinery Safety Essentials
1Machinery Directive – legal
requirements and responsibilities
2 Understanding PUWER
3 Functional Safety
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Responsibilities
The Manufacturer The User
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Single European Market
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• 28 different countries
• 28 different legal systems
• All countries introduce the same laws into their own legal systems
• The Directives are adopted as Laws and must be complied with before supplying equipment into the European Economic Area (EEA).
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Directives that could apply to machinery
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• The Machinery Directive
2006/42/EC.
• The Low Voltage Directive
2014/35/EU.
• The EMC Directive 2014/30/EU.
• The Pressure Equipment Directive
2014/68/EU.
• Equipment for Explosive Atmosphere
2014/34/EU.
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Why do we have to comply?
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Because all of the European directives
are brought into UK law by the issue of
Regulations, it makes it a criminal
offence, punishable by fines and
imprisonment, not to comply.
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Why do we have to comply?
TÜV SÜD Product Service Slide 10CE Marking and Electrical Safety Workshop25/04/2017
Machinery Directive – Supply of
Machinery Regulations
Low Voltage Directive – Electrical
Equipment (Safety) Regulations
EMC Directive – EMC Regulations
PED – Pressure Equipment Regulations
ATEX - Equipment and Protective
Systems Intended for Use in Potentially
Explosive Atmospheres Regulations
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Definitions of Machinery
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• An assembly fitted with or intended to be fitted with a drive system other than directly applied manual or animal effort, consisting of linked parts or components, at least one of which moves, and which are joined together for a specific application.
• Lifting apparatus whose only power source is directly applied manual effort.
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Definitions of Machinery
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• An assembly of machines and/or
partly completed machinery which, in
order to achieve the same end are
arranged and controlled to function
as an integral whole.
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Definitions of Machinery
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• Interchangeable equipment is a device which, after placing into service of machinery or tractor is assembled with that machinery or tractor by the operator himself in order to change its function.
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Definition of a Safety Component (Article 2(c))
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• which serves to fulfil a safety function,
• which is independently placed on the market,
• the failure and/or malfunction of which endangers the safety of persons and,
• which is not necessary in order for the machinery to function, or for which normal
components may be substituted in order for the machinery to function.
An indicative list can be found in Annex V.
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TÜV SÜD Product Service Slide 1517-06-28
Examples of Safety Components
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Scenarios where the MD applies
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• If you are creating an assembly of machines by interlinking a
series of existing machines you are in effect creating something new.
• Therefore who ever is carrying out the work must ensure that the whole
assembly complies with the Directive.
• Regardless of the age of the machines.
• If you are altering the function or performance of a machine or an assembly of
machines you are again creating something new and must ensure that the
Directive is complied with.
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Scenarios where the MD applies
TÜV SÜD Product Service Slide 17CE Marking and Electrical Safety Workshop25/04/2017
These requirements also apply to in-house machinery.
• where the manufacturer of relevant machinery himself puts that machinery into service.
• Having directly imported machinery from a country or territory outside the EEA and puts that machinery into service.
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The Four Steps to Compliance for the Machinery Directive
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1. Complying with the EHSR’s in Annex I
2. Compiling the Technical Construction File (TCF) in accordance with Annex VII
3. Raising the Declaration of Conformity in accordance with Annex II
4. Affixing the CE Mark in accordance with Annex III
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1. General. 2. Foodstuffs, Medical.
3. Mobile Machinery. 4. Lifting Equipment.
5. Underground Machinery. 6. Lifting or Moving of Persons.
How to Comply – EHSR’s
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Step 1
• The Essential Health and Safety Requirement’s laid down in the Machinery
Directive are mandatory.
• They are separated into six sections:
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EN Standards
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Use of Standards
There are Three Types of Standard:
• “A” type apply to all machines.
• “B” type are designed to promote safety and split in to B1 and B2.
• “C” type apply to a specific type of machine.
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TYPE C
MACHINERY
SPECIFIC
STANDARDS
BS EN ISO 12100:2010
Safety of machinery Basic concepts, general
principles for design. Risk Assessment and
risk reduction
BS EN 13849-1Safety-related parts of
control systems.
PR EN 418
Emergency Stop
SPECIFIC PROTECTIVE
DEVICE STANDARDS
2 Hand Controls
Light Curtains
Safety Switches etc
BS EN 60204 - 1
Electrical
Equipment
BS EN ISO 13850
Emergency Stop
EN Standards
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EN Standards
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Why we apply Standards
The standards are used to apply “good engineering practice” and
“state of the art” which in turn allows a presumption of conformity to
be assumed.
We apply the relevant standards which are quite prescriptive on what
measures should be in place to achieve compliance.
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EN Standards
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Examples of “B” Type Standards
• BS EN ISO 14120 Relates to the selection and manufacturing of Guards.
• BS EN 349 Relates to minimum gaps to prevent Crushing of the whole body
• BS EN ISO 13857 Relates to the positioning of guards to protect the upper limbs
and the lower limbs.
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BS EN ISO 13857
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Enclosing Fixed Guard
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Suitability of Guards
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Suitability of Guards
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Examples of C Type Standards
• BS EN 415
Series “Safety of Packaging Machines” in 10 parts, part 4 applies to Palletisers
and De-Palletisers.
• BS EN 10218-1
“Industrial Robots Recommendations for Safety”.
• BS EN 12417
“Safety of Machine tools Machining Centres”.
EN Standards
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Technical File
CE Marking and Electrical Safety Workshop
Step 2
A Technical Construction File (TCF) including:
• a general description of the machinery,
• the overall drawing of the machinery and drawings of the control circuits, as well as the pertinent descriptions and explanations necessary for understanding the operation of the machinery,
• full detailed drawings, accompanied by any calculation notes, test results, certificates, etc. required to check the conformity of the machinery with the essential health and safety requirements,
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Overall drawing
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Technical File
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Detailed Drawings
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Technical File
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Circuit Diagram
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Technical File
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Technical File
CE Marking and Electrical Safety Workshop
A list of the essential health and safety requirements which apply to the machinery,
means explaining how the machine complies with the requirements.
This can be in the form of:
• Risk assessments where the requirement has not been achieved and what
control is required to be implemented for compliance
• A report showing what harmonised standards and technical documents have
been applied
• Justification where deviation occurs from the standards to demonstrate the
machine is still compliant
• Test reports as required in the EHSR’s
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Technical File
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EHSR Checklist
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Technical File
CE Marking and Electrical Safety Workshop
• A copy of the instructions for the machinery,
• Where appropriate, the EC declaration of incorporation for included partly
completed machinery and the relevant assembly instructions for such machinery,
• Where appropriate, copies of the EC declaration of conformity of machinery or
other products incorporated into the machinery,
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Technical File
CE Marking and Electrical Safety Workshop
• A copy of the EC declaration of conformity;
• For series manufacture, the internal measures that will be implemented to
ensure that the machinery remains in conformity with the provisions of the
Directive. (Quality System).
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Declarations
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Step 3
• Declaration of Conformity or
Incorporation.
• This has to accompany the machine.
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Step 3
• The Declaration of Incorporation is used
with a machine which is specifically
designed to be incorporated into an
assembly of machines and not capable of
independent work.
Declarations
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Changes to Declaration of Conformity
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Step 4
• Name and address of the person who is authorised to compile the Technical File,who must be established in the European Community.
• Where appropriate a statement confirming declaration of conformity with other applicable directives.
• The place and date of the declaration.
• Must be typewritten or handwritten in capital letters.
It is illegal to affix the CE mark to a machine unlessit complies with all applicable Directives.
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An Introduction to Machinery Safety Essentials
1Machinery Directive – legal
requirements and responsibilities
2 Understanding PUWER
3 Functional Safety
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Implementing the Work Equipment Directive
2009/104/EC.
Provision and Use of Work Equipment Regulations 1998
PUWER 98
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• Made under the Health & Safety at Work Act 1974.
• Only applies where the HSWA applies.
• Does not require a CE mark, Technical File or Declaration of Conformity.
• Mobile work equipment.
• Lifting equipment.
• The inspection of work equipment.
APPLIES TO ALL WORK EQUIPMENT, REGARDLESS OF AGE INCLUDING CE MARKED EQUIPMENT
PUWER ‘98
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• It could result in prosecution and penalties, on conviction,
of a fine of up to:
a) On summary conviction £20,000 fine and or 3 Months in prison.
b) On conviction on indictment unlimited fine and or two years imprisonment
c) Many more prosecutions under PUWER than other Regulations
If You Don’t Comply
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• Part I Introduction.
• Part II General. Regs 1 to 24
• Part III Mobile Work Equipment. Regs 25 to 30
• Part IV Power Presses. Regs 31 to 35
• Part V Miscellaneous. Regs 36 to 39
• Regulations 1 to 9 with the exception of regulation 6 are to do with Policies and
Procedures and look at Policies and Procedures, Maintenance, Operating
Information, Training, Health and Safety Policies, etc.
Layout of PUWER ‘98
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Where the safety of work equipment depends on installation it must be inspected:
(a) After installation and before being put into service for the first time or
(b) After assembly at a new site or in a new location.
Work Equipment exposed to conditions causing deterioration liable to result in a
dangerous situation must be inspected
Regulation 6 part 1 - Inspection
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• At suitable intervals, and
• Each time circumstances liable to jeopardise the safety have occurred.
• The results of any inspection made under this regulation must be recorded.
• These records must be kept until the next inspection is recorded.
If you sell or purchase a second hand machine, it must also be inspected.
Regulation 6 part 2&3 - Inspection
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TÜV SÜD Product Service Slide 4717-06-28
Regulation 6 - Inspection
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• The persons who determine the nature of the inspections
required and who carry out the inspections are competent to do so.
• The competent person deciding the nature of the inspection should have the
necessary knowledge and experience to decide what the inspection should
include, how and when it should be carried out.
• The competent person carrying out the inspection should have the necessary
knowledge and experience to know what to look at, what to look for, how and who
to report to.
• Covers things like Testing of Light Guards and Scanners etc.
Regulation 6 - Inspection
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Requires that an Employer must ensure that any equipment that is subject
to European Directives complies with the Directives that apply to it.
• Relevant Declarations or Certificates provided
• Instructions to allow for safe use
• Information on residual risks (noise, vibration etc.)
• Any obvious signs of non-compliance
Regulation 10 – Community Requirements
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• Regulation 11 – Access to Dangerous Parts of Machinery
• Regulation 12 – Specified Hazards, Fire, Heat etc
• Regulation 13 – High/Low Temperatures
• Regulation 14 – Start Controls
• Regulation 15 – Stop Controls
• Regulation 16 – Emergency Stop Controls
Regulations 11-24
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• Regulation 17 – Operating Controls
• Regulation 18 – Control Systems
• Regulation 19 – Isolation of Energy
• Regulation 20 – Stability
• Regulation 21 – Lighting
• Regulation 22 – Maintenance
• Regulation 23 – Markings
• Regulation 24 – Warnings
Regulations 11-24
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• Regulation 25 - 30 – Mobile Work Equipment
• Other Regulations on Power Presses etc
• Revocation of Other Regulations
Regulations 25 - 39
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Life Cycle of a Machine
PUWER Danger Area
CE MARKING
TÜV SÜD Product Service Slide 53Machinery Safety Version 2.0 2017
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Changing a machine in a assembly of machines or component in a
single machine.
If the function or performance are not altered this is classed as a repair and
no action other than a risk assessment and compliance with PUWER 98 is
required.
Changing a machine/ component
Machinery Safety Version 2.0 2017TÜV SÜD Product Service Slide 54
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An Introduction to Machinery Safety Essentials
1Machinery Directive – legal
requirements and responsibilities
2 Understanding PUWER
3 Functional Safety
TÜV SÜD Product Service Slide 5525/04/2017 CE Marking and Electrical Safety Workshop
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References
Functional Safety of Machinery: EN ISO 13849-1 Slide 56
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Standards for Functional Safety
Two standards are available for use in the machinery
sector
Source: BGIA Report 2/2008e
Functional Safety of Machinery: EN ISO 13849-1 Slide 57
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• EN 62061
– Safety of Machinery: Functional safety of electrical, electronic and programmable
electronic control systems
– Technology specific
– Covers all levels of complexity
• EN ISO 13849-1
– Safety of machinery — Safety-related parts of control systems Part 1: General
principles for design
– Is a replacement for EN 954-1
– Not technology specific, can be used for any energy source.
– Can also be used for Programmable Systems (Safety PLC’s)
Which standard to use?
Functional Safety of Machinery: EN ISO 13849-1 Slide 58
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EN ISO 13849-1
Source: BGIA Report 2/2008e
Functional Safety of Machinery: EN ISO 13849-1 Slide 59
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Frequency of Failures
Out of control
Why control systems go wrong and how to
prevent failure?
(Out of control, 2nd edition 2003, Health & Safety Executive HSE – UK)
Functional Safety of Machinery: EN ISO 13849-1 Slide 60
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• Failure related in a deterministic way to a certain cause, which can only be
eliminated by a modification of the design or of the manufacturing process,
operational procedures, documentation or other relevant factors– the safety requirements specification,
– the design, manufacture, installation, operation of the hardware, and
– the design, implementation, etc., of the software.
• Further information can be found in EN ISO 13849-1, in particular in Annex G
Systematic failure
Functional Safety of Machinery: EN ISO 13849-1 Slide 61
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Overall Risk Estimation/Risk Reduction
EN ISO 13849-1 Figure 1
Functional Safety of Machinery: EN ISO 13849-1 Slide 62
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Risk estimation – general principles
Risk related
to the
identified
hazard
Severity
of the
possible
harm
(Se)
Probability of occurence of that harm
Frequency and duration of exposure (Fr)
Probability of occurrence of
a hazardous event (Pr)
Probability of avoiding or
limiting harm (Av)
=and
Functional Safety of Machinery: EN ISO 13849-1 Slide 63
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• A control system in a machine should be regarded as being safety-related if
it contributes to reducing any risk to an acceptable level or if it is required to
function correctly to maintain or achieve safety.
Safety-Related Controls
What is a Safety Related Control System?
Functional Safety of Machinery: EN ISO 13849-1 Slide 64
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EN ISO 13849-1
• 4.2.2 – For each safety function the characteristics and the required performance
level shall be specified
• 4.3 Determination of required performance level (PLr)
– For each selected safety function to be carried out by a SRP/CS, a required
performance level (PLr) shall be determined and documented (see Annex A for
guidance on determining PLr).
Specifying requirements
Functional Safety of Machinery: EN ISO 13849-1 Slide 65
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• Safety related stop function initiated by safeguard
• Local control function
• Hold to run
• Enabling device
• Muting function
• Prevention of unexpected start up
• Control modes and mode selection
• Emergency stop
Safety Functions - Examples
Functional Safety of Machinery: EN ISO 13849-1 Slide 66
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EN ISO 13849-1 Annex A risk graph
Functional Safety of Machinery: EN ISO 13849-1 Slide 67
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• Severity of Injury.– S1 Slight injury, (bruise).
– S2 Severe injury, (Amputation or death).
• Frequency of exposure to injury.– F1 Seldom.
– F2 Frequent to continuous ( Frequent to continuous are not defined in the
standard).
• Possibility of avoiding the hazard.– P1 Possible.
– P2 Less possible. Based on the speed of approach of the hazard and the ability of the operator to avoid
the hazard. If the operator can avoid the hazard then you would choose P1.
Risk Graph Parameters
Functional Safety of Machinery: EN ISO 13849-1 Slide 68
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• The Performance Level achieved by a Safety Function depends on:
– The architectures of the SRP/CS Categories
– The reliability of components E.g. Mean Time To Dangerous Failure (MTTFd)
– The effectiveness of error detection Diagnostic Coverage (DC)
Factors to establish PL
Functional Safety of Machinery: EN ISO 13849-1 Slide 69
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Designated Architectures - Categories
B SRP/CS shall be designed in accordance with relevant standards
1 SRP/CS shall use well tried components and principles. No protection against
faults.
2 SRP/CS shall use well tried principles and functions shall be “checked at
suitable intervals”. Testing rate better than 100 times demand rate. No
protection against faults.
3 SRP/CS shall be designed, so that: a single fault in any of these parts does
not lead to the loss of the safety function; and whenever reasonably
practicable the single fault is detected.
4 SRP/CS shall be designed, so that: a single fault in any of these parts does
not lead to a loss of the safety function; and the single fault is detected at or
before the next demand upon the safety function. If this is not possible, then
an accumulation of faults shall not lead to a loss of the safety function
Functional Safety of Machinery: EN ISO 13849-1 Slide 70
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Functional Safety of Machinery: EN ISO 13849-1 Slide 71
Cat B & 1
Cat 2
Cat 3
Cat 4
Designated Architectures - Categories
Cat 3