Electrical equipment for furnaces and ancillary equipment - Part 2: Requirements for design, development and type approval of safety devices and subsystems

This part of EN 50156 applies to the requirements for design, development and approval of safetyrelevant
equipment for the safety related system for furnaces that are operated with solid, liquid or
gaseous fuels and their ancillary equipment.
This part of EN 50156 specifies the requirements for safety-related equipment that is necessary to
meet the safety conditions of furnaces, to reduce the hazards of combustion and to protect the heated
systems from damage e.g. by overheating. Subsystems and devices of other technologies, which are
part of the safety-related system (see EN 50156-1:2015, 3.38), are covered by this part of EN 50156.
This part of EN 50156 sets out special requirements for design, development and approval of safety
devices and subsystems to satisfy the requirements of EN 50156-1:2015, Clause 10 “Additional
requirements for the application of a safety-related system”.

Elektrische Ausrüstung von Feuerungsanlagen - Teil 2: Bestimmungen für den Entwurf, die Entwicklung und die Baumusterprüfung von Sicherheitsbauteilen und Teilsystemen

Equipements électriques d'installation de chaudière - Partie 2: Règles pour la dessin, développement et essai de type d’ élément sécurité et sous-système

Električna oprema za peči in pomožno opremo - 2. del: Zahteve za snovanje, razvoj in odobravanje tipa varnostnih naprav in podsistemov

Ta del standarda EN 50156 se uporablja za zahteve za snovanje, razvoj in odobravanje varnostne opreme za z varnostjo povezani sistem za peči, ki delujejo na trdna, tekoča ali plinasta goriva, ter njihovo pomožno opremo.
Ta del standarda EN 50156 določa zahteve za z varnostjo povezane opreme, potrebne za izpolnjevanje varnostnih pogojev peči, da bi se zmanjšale nevarnosti zgorevanja in segreti sistemi zavarovali pred poškodbami, npr. zaradi pregrevanja. Podsistemi in naprave drugih tehnologij, ki so del z varnostjo povezanega sistema (glej EN 50156-1:2015, 3.38), so obravnavani v tem delu standarda EN 50156. Ta del standarda EN 50156 določa posebne zahteve za zasnovo, razvoj in odobritev varnostnih naprav in podsistemov za izpolnitev zahtev iz točke 10 standarda EN 50156-1:2015 »Dodatne zahteve za uporabo sistema, povezanega z varnostjo«.

General Information

Status
Published
Public Enquiry End Date
24-Dec-2012
Publication Date
13-Aug-2015
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-Jul-2015
Due Date
01-Oct-2015
Completion Date
14-Aug-2015

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 50156-2:2015
01-september-2015

(OHNWULþQDRSUHPD]DSHþLLQSRPRåQRRSUHPRGHO=DKWHYH]DVQRYDQMHUD]YRM

LQRGREUDYDQMHWLSDYDUQRVWQLKQDSUDYLQSRGVLVWHPRY

Electrical equipment for furnaces and ancillary equipment - Part 2: Requirements for

design, development and type approval of safety devices and subsystems

Elektrische Ausrüstung von Feuerungsanlagen - Teil 2: Bestimmungen für den Entwurf,

die Entwicklung und die Baumusterprüfung von Sicherheitsbauteilen und Teilsystemen

Equipements électriques d'installation de chaudière - Partie 2: Règles pour la dessin,

développement et essai de type d’ élément sécurité et sous-système
Ta slovenski standard je istoveten z: EN 50156-2:2015
ICS:
25.180.10 (OHNWULþQHSHþL Electric furnaces
SIST EN 50156-2:2015 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50156-2:2015
---------------------- Page: 2 ----------------------
SIST EN 50156-2:2015
EUROPEAN STANDARD EN 50156-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2015
ICS 27.060.01
English Version
Electrical equipment for furnaces and ancillary equipment - Part
2: Requirements for design, development and type approval of
safety devices and subsystems

Equipements électriques d'installation de chaudière - Partie Elektrische Ausrüstung von Feuerungsanlagen - Teil 2:

2: Règles pour la dessin, développement et essai de type d' Bestimmungen für den Entwurf, die Entwicklung und die

élément sécurité et sous-système Baumusterprüfung von Sicherheitsbauteilen und
Teilsystemen

This European Standard was approved by CENELEC on 2015-01-26. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50156-2:2015 E
---------------------- Page: 3 ----------------------
SIST EN 50156-2:2015
EN 50156-2:2015 (E)
Contents Page

European foreword ................................................................................................................................. 3

Introduction ............................................................................................................................................. 4

1 Scope .......................................................................................................................................... 5

2 Normative references ................................................................................................................ 5

3 Terms and definitions ............................................................................................................... 6

4 Requirements for safety devices and subsystems of safety-related systems ................... 6

4.1 General ....................................................................................................................................... 6

4.2 Requirements for safety devices and subsystems in electrical/electronic/

programmable electronic systems .......................................................................................... 7

4.2.1 General ....................................................................................................................................... 7

4.2.2 Type approval in accordance with product standards .......................................................... 7

4.2.3 Type approval following the requirements of EN 61508 ....................................................... 7

4.3 Requirements for safety devices and subsystems of other technologies .......................... 8

4.3.1 General ....................................................................................................................................... 8

4.3.2 Type approval by product standards ...................................................................................... 8

4.3.3 Type approval by fault assessment ......................................................................................... 8

4.3.4 Quality assurance ...................................................................................................................... 9

4.3.5 Quantification ............................................................................................................................ 9

4.3.6 Recurring functional testing .................................................................................................... 9

4.3.7 Operating instructions ............................................................................................................10

Annex A (normative) Proven in use for subsystems and devices of other technologies ...........11

Annex B (informative) Aspects with influence on functional safety ..............................................13

Annex C (informative) Summary of the characteristic data for use of a subsystem or

device in safety-related systems ...........................................................................................14

C.1 Classification of the product ..................................................................................................14

C.2 Characteristic data according to EN 61508, Parts 1 to 7:....................................................14

C.2.1 Data for use of the product as a subsystem or device in safety functions .......................14

C.2.2 Additional data for use of the product as a component in safety functions .....................14

Bibliography ..........................................................................................................................................16

---------------------- Page: 4 ----------------------
SIST EN 50156-2:2015
EN 50156-2:2015 (E)
European foreword

This document (EN 50156-2:2015) has been prepared by CLC/BTTF 132-2 “Revision of EN 50156

'Electrical equipment for furnaces and ancillary equipment'”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2016-01-26
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2018-01-26
conflicting with this document have to
be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.

This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment

Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).

This European Standard is the second part of a series of European Standards that specify the

requirements for equipment of safety functions for furnaces, especially safety related systems to

protect personnel, the furnace with ancillary equipment against hazards related to heat generation, the

heated system and to operate reliably during normal conditions, and abnormal conditions that can be

foreseen.

EN 50156, Electrical equipment for furnaces and ancillary equipment, consists of the following parts:

• Part 1: Requirements for application design and installation;

• Part 2: Requirements for design, development and type approval of safety devices and

subsystems;
• Part 3: Requirements for plant-specific tests of safety-related equipment .

This European Standard is based on EN 61508:2010, Functional safety – Safety-related systems,

Parts 1 to 7 as a basic safety standard.
———————
1) In preparation.
---------------------- Page: 5 ----------------------
SIST EN 50156-2:2015
EN 50156-2:2015 (E)
Introduction

This part of EN 50156 sets out the requirements and recommendations for design, development and

type approval of safety devices and subsystems to be applied to protect personnel, property and

environment against the hazards of furnaces with ancillary equipment and the systems heated by the

thermal energy released in the furnace. The operating conditions of the furnace, the hazards of

combustion and the safety of the heated system are considered.

The safety requirements for all stages of the life-cycle of a particular plant, proof of fulfilment of the

plant-specific safety-requirements, are defined in Part 1 of EN 50156. The requirements for plant

specific tests during implementation, operation and maintenance are defined in Part 3 of EN 50156.

The requirements for the application of safety-related systems are specified in EN 50156-1:2015,

Clause 10. The rating of necessary safety integrity levels, as specified in EN 50156-1:2015, 10.4, is

based on EN 61508-1.

For the plant-specific implementation of safety-related systems, it is necessary to organize

management of functional safety and to satisfy safety life-cycle requirements.
---------------------- Page: 6 ----------------------
SIST EN 50156-2:2015
EN 50156-2:2015 (E)
1 Scope

This part of EN 50156 applies to the requirements for design, development and approval of safety-

relevant equipment for the safety related system for furnaces that are operated with solid, liquid or

gaseous fuels and their ancillary equipment.

This part of EN 50156 specifies the requirements for safety-related equipment that is necessary to

meet the safety conditions of furnaces, to reduce the hazards of combustion and to protect the heated

systems from damage e.g. by overheating. Subsystems and devices of other technologies, which are

part of the safety-related system (see EN 50156-1:2015, 3.38), are covered by this part of EN 50156.

This part of EN 50156 sets out special requirements for design, development and approval of safety

devices and subsystems to satisfy the requirements of EN 50156-1:2015, Clause 10 “Additional

requirements for the application of a safety-related system”.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN 161:2011+A3:2013, Automatic shut-off valves for gas burners and gas appliances

EN 267:2009+A1:2011, Automatic forced draught burners for liquid fuels

EN 298:2012, Automatic burner control systems for burners and appliances burning gaseous or liquid

fuels
EN 676:2003+A2:2008, Automatic forced draught burners for gaseous fuels

EN 1643:2014, Safety and control devices for gas burners and gas burning appliances - Valve proving

systems for automatic shut-off valves

EN 1854:2010, Pressure sensing devices for gas burners and gas burning appliances

EN 12067-2:2004, Gas/air ratio controls for gas burners and gas burning appliances - Part 2:

Electronic types

EN 12952-11:2007, Water-tube boilers and auxiliary installations - Part 11: Requirements for limiting

devices of the boiler and accessories

EN 12953-9:2007, Shell boilers - Part 9: Requirements for limiting devices of the boiler and

accessories

EN 13611:2007+A2:2011, Safety and control devices for gas burners and gas burning appliances -

General requirements

EN 16340:2014, Safety and control devices for burners and appliances burning gaseous or liquid fuels

- Combustion product sensing devices

EN 50156-1:2015, Electrical equipment for furnaces and ancillary equipment – Part 1: Requirements

for application design and installation

EN 60730-1:2011, Automatic electrical controls for household and similar use - Part 1: General

requirements (IEC 60730-1:2010)
---------------------- Page: 7 ----------------------
SIST EN 50156-2:2015
EN 50156-2:2015 (E)

EN 60812:2006, Analysis techniques for system reliability - Procedure for failure mode and effects

analysis (FMEA) (IEC 60812:2006)

EN 60947-2:2006, Low-voltage switchgear and controlgear - Part 2: Circuit-breakers (IEC 60947-

2:2006)

EN 61010-1:2010, Safety requirements for electrical equipment for measurement, control, and

laboratory use - Part 1: General requirements (IEC 61010-1:2010+corr 2011)

EN 61131-2:2007, Programmable controllers - Part 2: Equipment requirements and tests (IEC 61131-

2:2007)

EN 61508-1:2010, Functional safety of electrical/electronic/programmable electronic safety-related

systems - Part 1: General requirements (IEC 61508-1:2010)

EN 61508-2:2010, Functional safety of electrical/electronic/programmable electronic safety-related

systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related

systems (IEC 61508-2:2010)

EN 61508-3:2010, Functional safety of electrical/electronic/programmable electronic safety-related

systems - Part 3: Software requirements (IEC 61508-3:2010)

EN 61508-4:2010, Functional safety of electrical/electronic/programmable electronic safety-related

systems - Part 4: Definitions and abbreviations (IEC 61508-4:2010)

EN 61508-5:2010, Functional safety of electrical/electronic/programmable electronic safety-related

systems - Part 5: Examples of methods for the determination of safety integrity levels (IEC 61508-

5:2010)

EN 61508-6:2010, Functional safety of electrical/electronic/programmable electronic safety-related

systems - Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3 (IEC 61508-6:2010)

EN 61508-7:2010, Functional safety of electrical/electronic/programmable electronic safety-related

systems - Part 7: Overview of techniques and measures (IEC 61508-7:2010)

EN 61800-5-2:2007, Adjustable speed electrical power drive systems - Part 5-2: Safety requirements -

Functional (IEC 61800-5-2:2007)

EN ISO 23553-1:2014, Safety and control devices for oil burners and oil-burning appliances -

Particular requirements - Part 1: Automatic and semi-automatic valves (ISO 23553-1:2014)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 50156-1:2015 apply.

4 Requirements for safety devices and subsystems of safety-related systems
4.1 General

The qualification and conformity for subsystems or devices as E/E/PES is defined in 4.2 and for

subsystems and devices of other technology in 4.3

Safety functions of the safety related system, such as flame monitoring, pre-purge, air-gas ratio

control, fuel safety shut-off-valves etc. shall fulfil the requirements of the relevant product standards

(see 4.2.2 and 4.3.2). When thereof are deviations (e.g. concerning process technical reasons,

---------------------- Page: 8 ----------------------
SIST EN 50156-2:2015
EN
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Elektrische Ausrüstung von Feuerungsanlagen - Teil 2: Bestimmungen für den Entwurf, die Entwicklung und die Baumusterprüfung von Sicherheitsbauteilen und TeilsystemenElectrical equipment for furnaces and ancillary equipment - Part 2: Requirements for design, development and type approval of safety devices and subsystems25.180.10Electric furnacesICS:Ta slovenski standard je istoveten z:prEN 50156-2:2012oSIST prEN 50156-2:2012en01-december-2012oSIST prEN 50156-2:2012SLOVENSKI

STANDARD
oSIST prEN 50156-2:2012
DRAFT EUROPEAN STANDARD prEN 50156-2 NORME EUROPÉENNE
EUROPÄISCHE NORM August 2012

CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2012 CENELEC -

All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Project: 21847 Ref. No. prEN 50156-2:2012 E

ICS 27.060.01
English version
Electrical equipment for furnaces and ancillary equipment -
Part 2: Requirements for design, development and type approval of
safety devices and subsystems
To be completed
Elektrische Ausrüstung von Feuerungsanlagen -

Teil 2: Bestimmungen für den Entwurf, die Entwicklung und die Baumusterprüfung von Sicherheitsbauteilen und Teilsystemen

This draft European Standard is submitted to CENELEC members for CENELEC enquiry. Deadline for CENELEC: 2013-01-25.

It has been drawn up by CLC/BTTF 132-2.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.

oSIST prEN 50156-2:2012

prEN 50156-2:2012 – 2 – Contents Page 1 Foreword ................................................................................................................................................. 32 Introduction ............................................................................................................................................. 43 1Scope .......................................................................................................................................... 54 2Normative references ................................................................................................................ 55 3Terms and definitions ............................................................................................................... 66 4Requirements for safety devices and subsystems of safety-related systems ................... 67 4.1Requirements for safety devices and subsystems in electrical/electronic/ 8 programmable electronic systems .......................................................................................... 69 4.1.1General ....................................................................................................................................... 610 4.1.2Requirements for qualification ................................................................................................ 611 4.2Requirements for safety devices and subsystems of other technologies .......................... 712 4.2.1General ....................................................................................................................................... 713 4.2.2Qualification ............................................................................................................................... 714 4.2.3Quality assurance ...................................................................................................................... 815 4.2.4Quantification ............................................................................................................................ 816 4.2.5Recurring functional testing .................................................................................................... 817 4.2.6Operating instructions .............................................................................................................. 818 Annex A (normative)

Proven in operation for subsystems and devices of other 19 technologies .............................................................................................................................. 920 Annex B (informative)

Aspects with influence on functional safety ..............................................1121 Annex C (informative)

Summary of the characteristic data for use of a subsystem or 22 device in safety-related applications .....................................................................................1223 C.1Classification of the product ..................................................................................................1224 C.2Characteristic data according to EN 61508, Parts 1 to 7:....................................................1225 C.2.1Data for use of the product as a subsystem or device in safety functions .......................1226 C.2.2Additional data for use of the product as a component

in safety functions....................1227 Annex ZZ (informative)

Relationship between this European Standard and the Essential 28 Requirements of EU Directive 97/23/EC ................................................................................1329 Bibliography ..........................................................................................................................................1430

31 oSIST prEN 50156-2:2012

– 3 – prEN 50156-2:2012 Foreword 32 This document [prEN 50156-2:2012] has been prepared by CLC/BTTF 132-2 "Revision of EN 50156 33 'Electrical equipment for furnaces and ancillary equipment'" in cooperation with the National 34 Committee DKE/K 232. 35 This document is currently submitted to the Enquiry. 36 This document has been prepared under a mandate given to CENELEC by the European Commission 37 and the European Free Trade Association, and supports essential requirements of EU Directive(s). 38 For the relationship with EU Directive 97/23/EC, see informative Annex ZZ, which is an integral part of 39 this document. 40 This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment 41 Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC). 42 This European Standard is the second part of a series of European Standards that specify the 43 requirements for equipment of safety functions for furnaces, especially protective equipment to protect 44 personnel, the furnace with ancillary equipment against hazards related to heat generation, the heated 45 system and to operate reliably during normal conditions, and abnormal conditions that can be 46 foreseen. 47 EN 50156, Electrical equipment for furnaces and ancillary equipment, consists of the following parts: 48 • Part 1: Requirements for application design and installation 1); 49 • Part 2: Requirements for design, development and type approval of safety devices and 50 subsystems 1); 51 • Part 3: Requirements for plant-specific tests of safety-related equipment 2). 52 This European Standard is based on EN 61508:2010, Functional safety – Safety-related systems, 53 Parts 1 to 7 as a basic safety standard. 54 This European Standard will serve as a basis for requirements in relation to equipment for safety 55 functions of heated pressure equipment (e.g. boilers) to be referenced in European Standards to be 56 developed by CEN/TC 269. 57 Where applicable, essential safety requirements in the relevant standard EN 60204-1 are taken into 58 account.. 59 ——————— 1) At draft stage. 2) In preparation. oSIST prEN 50156-2:2012

prEN 50156-2:2012 – 4 – Introduction 60 This part of EN 50156 sets out the requirements and recommendations for design, development and 61 type-approval of safety devices and subsystems to be applied to protect personnel, property and 62 environment against the hazards of furnaces with ancillary equipment and the systems heated by the 63 thermal energy released in the furnace. The operating conditions of the furnace, the hazards of 64 combustion and the safety of the heated system are considered.

65 Safety-related systems are applied for plant-specific protective systems consisting of particular safety 66 devices and/or subsystems for e.g. 67 • monitoring of flames and other safety conditions of the firing, 68 • interrupting of the flow of fuel to the furnace, 69 • ventilating the body of the furnace and the flue gas ducts, 70 • monitoring of the safety conditions of the heated systems (e.g. water level limiter in steam 71 boilers), 72 which may be necessary to ensure proper ignition and combustion of fuel and to avoid the 73 development, existence and/or ignition of explosive mixtures of fuel and air, and also to avoid damage 74 to the heated systems (see prEN 50156-1:2012, 3.25). 75 This part of EN 50156 describes all the activities necessary for design, development and type-76 approval of safety devices and subsystems. 77 The safety requirements for all stages of the life-cycle of a particular plant, proof of fulfilment of the 78 plant-specific safety-requirements, are defined in Part 1 of EN 50156. The requirements for functional 79 tests during implementation and operation and maintenance are defined in Part 3 of EN 50156. 80 The requirements for the application of safety-related systems are specified in prEN 50156-1:2012, 81 Clause 10. The rating of necessary safety integrity levels, as specified in prEN 50156-1:2012, 10.4, is 82 based on EN 61508-1. The requirements for safety-related systems for boilers have been coordinated 83 with CEN/TC 269. 84 For the plant-specific implementation of safety-related systems, it is necessary to organise 85 management of functional safety and to satisfy safety life-cycle requirements. Clauses 4 and 5, which 86 deal with these requirements, are based on EN 61511-1. 87 Figure 1 of prEN 50156-1:2012 assists understanding of the relationship between the various 88 elements of furnaces and their ancillary equipment, the heated systems, the control system and the 89 protective system(s). 90 oSIST prEN 50156-2:2012

– 5 – prEN 50156-2:2012 1 Scope 91 This part of EN 50156 applies to the requirements for design, development and qualification of safety-92 relevant equipment for the protective system for furnaces that are operated with solid, liquid or 93 gaseous fuels and their ancillary equipment.

94 This part of EN 50156 specifies the requirements for safety-related equipment that is necessary to 95 meet the safety conditions of furnaces, to reduce the hazards of combustion and to protect the heated 96 systems from damage e.g. by overheating. Subsystems and devices of other technologies, which are 97 part of the safety-related system (see prEN 50156-1:2012, 3.38), are covered by this part of 98 EN 50156. 99 This part of EN 50156 sets out special requirements for design, development and type approval of 100 safety devices and subsystems to satisfy the requirements of prEN 50156-1:2012, Clause 10 101 “Additional requirements for the application of a safety-related system”. For devices and subsystems 102 of safety-related systems that are approved according to the European Standards cited in 4.1.2.1 and 103 4.2.2, the requirements of this part of EN 50156 are already satisfied. 104 2 Normative references 105 The following documents, in whole or in part, are normatively referenced in this document and are 106 indispensable for its application. For dated references, only the edition cited applies. For undated 107 references, the latest edition of the referenced document (including any amendments) applies. 108 EN 161:2011+A2:2012, Automatic shut-off valves for gas burners and gas appliances 109 EN 267:2009+A1:2011, Automatic forced draught burners for liquid fuels 110 EN 298:2012, Automatic burner control systems for burners and appliances burning gaseous or liquid 111 fuels

112 EN 676:2003+A2:2008, Automatic forced draught burners for gaseous fuels 113 EN 1643:2000, Valve proving systems for automatic shut-off valves for gas burners and gas 114 appliances 115 EN 1854:2010, Pressure sensing devices for gas burners and gas burning appliances 116 EN 12067-2:2004, Gas/air ratio controls for gas burners and gas burning appliances – Part 2: 117 Electronic types 118 EN 12952-11:2007, Water-tube boilers and auxiliary installations – Part 11: Requirements for limiting 119 devices of the boiler and accessories 120 EN 13611:2007+A2:2011, Safety and control devices for gas burners and gas burning appliances – 121 General requirements 122 prEN 50156-1:2012, Electrical equipment for furnaces and ancillary equipment – Part 1: Requirements 123 for application design and installation 124 EN 60730 (all parts), Automatic electrical controls for household and similar use (IEC 60730, all parts) 125 EN 60812:2006, Analysis techniques for system reliability – Procedure for failure mode and effects 126 analysis (FMEA) (IEC 60812:2006) 127 EN 60947-2, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers (IEC 60947-2) 128 EN 61010-1:2010, Safety requirements for electrical equipment for measurement, control, and 129 laboratory use – Part 1: General requirements (IEC 61010-1:2010 + corr. May 2011) 130 oSIST prEN 50156-2:2012

prEN 50156-2:2012 – 6 – EN 61131-2:2007, Programmable controllers – Part 2: Equipment requirements and tests 131 (IEC 61131-2:2007) 132 EN 61508-1:2010, Functional safety of electrical/electronic/programmable electronic safety-related 133 systems – Part 1: General requirements (IEC 61508-1:2010) 134 EN 61508-2:2010, Functional safety of electrical/electronic/programmable electronic safety-related 135 systems – Part 2: Requirements for electrical/electronic/programmable electronic safety-related 136 systems (IEC 61508-2:2010) 137 EN 61508-3:2010, Functional safety of electrical/electronic/programmable electronic safety-related 138 systems – Part 3: Software requirements (IEC 61508-3:2010) 139 EN 61508-4:2010, Functional safety of electrical/electronic/programmable electronic safety-related 140 systems – Part 4: Definitions and abbreviations (IEC 61508-4:2010) 141 EN 61508-5:2010, Functional safety of electrical/electronic/programmable electronic safety-related 142 systems – Part 5: Examples of methods for the determination of safety integrity levels 143 (IEC 61508-5:2010) 144 EN 61508-6:2010, Functional safety of electrical/electronic/programmable electronic safety-related 145 systems – Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3 (IEC 61508-6:2010) 146 EN 61508-7:2010, Functional safety of electrical/electronic/programmable electronic safety-related 147 systems – Part 7: Overview of techniques and measures (IEC 61508-7:2010) 148 EN 61800-5-2:2007, Adjustable speed electrical power drive systems – Part 5-2: Safety requirements – 149 Functional (IEC 61800-5-2:2007) 150 EN ISO 23553-1:2009, Safety and control devices for oil burners and oil-burning appliances – 151 Particular requirements – Part 1: Shut-off devices for oil burners (ISO 23553-1:2007, including 152 Cor.1:2009) 153 3 Terms and definitions 154 For the purposes of this document, the terms and definitions given in prEN 501

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