EN IEC 63044-4:2021

SLOVENSKI STANDARD
01-november-2021
Splošne zahteve za stanovanjske in stavbne elektronske sisteme (HBES) in
sisteme za avtomatizacijo in krmiljenje stavb (BACS) - 4. del: Varnostne zahteve za
splošno funkcionalnost proizvodov, namenjenih za integracijo v stavbne
elektronske sisteme (HBES) in sisteme za avtomatizacijo in krmiljenje stavb
(BACS)
General requirements for Home and Building Electronic Systems (HBES) and Building
Automation and Control Systems (BACS) - Part 4: General functional safety
requirements for products intended to be integrated in Building Electronic Systems
(HBES) and Building Automation and Control Systems (BACS)
Ta slovenski standard je istoveten z: EN IEC 63044-4:2021
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63044-4

NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2021
ICS 29.120.01; 29.120.99
English Version
Home and building electronic systems (HBES) and building
automation and control systems (BACS) - Part 4: General
functional safety requirements for products intended to be
integrated in HBES and BACS
(IEC 63044-4:2021)
Systèmes électroniques pour les foyers domestiques et les Allgemeine Anforderungen an die Elektrische
bâtiments (HBED) et systèmes de gestion technique du Systemtechnik für Heim und Gebäude (ESHG) und an
bâtiment (SGTB) - Partie 4: Exigences générales de Systeme der Gebäudeautomation (GA) - Teil 4:
sécurité fonctionnelle pour les produits destinés à être Anforderungen an die funktionale Sicherheit für Produkte,
intégrés dans les HBES et SGTB die für den Einbau in ESHG/GA vorgesehen sind
(IEC 63044-4:2021) (IEC 63044-4:2021)
This European Standard was approved by CENELEC on 2021-08-03. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63044-4:2021 E

European foreword
The text of document 23/973/FDIS, future edition 1 of IEC 63044-4, prepared by IEC/TC 23 “Electrical
accessories” was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–05–03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–08–03
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 shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 63044-4:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60364 (series) NOTE Harmonized as HD 60364 (series)
IEC 60664-1:2020 NOTE Harmonized as EN IEC 60664-1:2020 (not modified)
IEC 61000-1-2 NOTE Harmonized as EN 61000-1-2
IEC 61000-6-1 NOTE Harmonized as EN IEC 61000-6-1
IEC 61000-6-2 NOTE Harmonized as EN IEC 61000-6-2
IEC 61000-6-3 NOTE Harmonized as EN IEC 61000-6-3
IEC 61000-6-4 NOTE Harmonized as EN IEC 61000-6-4
IEC 61508-1 NOTE Harmonized as EN 61508-1
IEC 61508-2 NOTE Harmonized as EN 61508-2
IEC 61508-3 NOTE Harmonized as EN 61508-3
ISO 9000 NOTE Harmonized as EN ISO 9000
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60364 series Low-voltage electrical installations HD 60364 series
IEC 61508 series Functional safety of EN 61508 series
electrical/electronic/programmable
electronic safety-related systems
IEC 61709 2017 Electric components - Reliability  EN 61709 2017
Reference conditions for failure rates and
stress models for conversion
IEC 63044-3 2017 Home and Building Electronic Systems EN IEC 63044-3 2018
(HBES) and Building Automation and
Control Systems (BACS) - Part 3: Electrical
safety requirements
IEC 63044-5 series Home and Building Electronic Systems EN IEC 63044-5 series
(HBES) and Building Automation and
Control Systems (BACS) - Part 5: EMC
requirements
IEC 63044-4 ®
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Home and building electronic systems (HBES) and building automation and

control systems (BACS) –
Part 4: General functional safety requirements for products intended to be

integrated in HBES and BACS
Systèmes électroniques pour les foyers domestiques et les bâtiments (HBES) et

systèmes de gestion technique du bâtiment (SGTB) –

Partie 4: Exigences générales de sécurité fonctionnelle pour les produits

destinés à être intégrés dans les HBES et SGTB

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.01; 29.120.99 ISBN 978-2-8322-9898-5

– 2 – IEC 63044-4:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 10
4.1 General . 10
4.2 Method of establishment of the requirements . 10
4.2.1 General . 10
4.2.2 HBES/BACS application environment . 11
4.2.3 Sources of hazards . 11
4.2.4 Hazardous events . 11
4.2.5 Derivation of requirements . 11
5 Requirements for functional safety . 12
5.1 General . 12
5.2 Power feeding . 12
5.3 Life time . 13
5.4 Reasonably foreseeable misuse . 13
5.5 Software and communication . 13
5.6 Remote operations . 15
5.6.1 General recommendations . 15
5.6.2 Within a single building or in its immediate vicinity . 15
5.6.3 From outside the building . 15
5.6.4 Management . 16
Annex A (informative) Example of a method for the determination of safety integrity
levels . 17
A.1 General . 17
A.2 As low as reasonably practicable (ALARP) and tolerable risk concepts . 17
Annex B (informative) Hazards and development of necessary functional safety
requirements . 19
Annex C (informative) Some examples of non-safety-related HBES/BACS applications . 27
C.1 General . 27
C.2 Examples of non-safety-related HBES/BACS applications . 27
C.2.1 Example 1: Oven . 27
C.2.2 Example 2: Devices presenting a high potential risk of hazard . 27
C.2.3 Example 3: Mains plugs, socket outlets and circuits . 28
C.2.4 Example 4: Water temperature adjustment . 28
Bibliography . 29

Figure A.1 – Risk reduction – General concept . 17

Table 1 – Requirements for avoiding inadvertent operations and possible ways to
achieve them . 16
Table A.1 – Example of risk classification of accidents. 18
Table A.2 – Interpretation of risk classes . 18
Table B.1 – Requirements and/or risk reduction measures . 19

IEC 63044-4:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) AND
BUILDING AUTOMATION AND CONTROL SYSTEMS (BACS) –

Part 4: General functional safety requirements for
products intended to be integrated in HBES and BACS

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organizati
...