Table of Contents

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Conformance
5 General requirements
  5.1 General
  5.2 Method of establishment for the requirements
      5.2.1 General
      5.2.2 HBES application environment
      5.2.3 Sources of hazards
      5.2.4 Hazardous events
      5.2.5 Derivation of requirements
6 Requirements for functional safety
  6.1 General
  6.2 Power feeding
      6.2.1 Safe restart after power is restored (1)
      6.2.2 Product marking and instructions prevent risk
            of wrong connections (3) (6)
      6.2.3 Product construction and design prevent wrong
            connections
  6.3 Environment
      6.3.1 Product designed for application environment and
            specified temperature range (7)
      6.3.2 Resistance to abnormal heat and prevention of
            fire propagation (8)
      6.3.3 Withstand of mechanical stress appropriate to
            the application(s) (9)
  6.4 Lifetime
  6.5 Reasonably foreseeable misuse
      6.5.1 Minimization of accidental download of wrong
            application software or parameters (15)
      6.5.2 Proper configuration and related parameters (15)
      6.5.3 Detection and/or indication of missing or
            incompletely configured products during
            configuration process (15)
  6.6 Software and communication
      6.6.1 Development process compliance with ISO 9000 or
            similar standards (16)
      6.6.2 Check for proper operation of product software
             and integrity of the configuration (16)
      6.6.3 Limitation of the traffic load imposed on the
            communication medium (12) (17)
      6.6.4 Proper function of product and exclusion of
            hazards on reception of messages from multiple
            sources (23)
      6.6.5 Defined state after a system reset (if any) (24)
      6.6.6 Restricted access to manual configuration of
            system parameters (24)
      6.6.7 Disturbed communication
  6.7 Remote operations
      6.7.1 General recommendations
      6.7.2 Within a single building or in its immediate
            vicinity
      6.7.3 From outside the building
      6.7.4 Management
Annex A (informative) Example of a method for the determination
                      of safety integrity levels
  A.1 General
  A.2 Terms and definitions
  A.3 As low as reasonably practicable (ALARP) and tolerable
      risk concepts
Annex B (informative) Hazards and development of necessary
                      functional safety requirements
Annex C (informative) Some examples of non safety related
                      HBES applications
  C.1 General
  C.2 Example 1: Oven
  C.3 Example 2: Devices presenting a high potential risk
      of hazard
  C.4 Example 3: Mains plugs, socket outlets and circuits
  C.5 Example 4: Water temperature adjustment
Bibliography

Abstract

Specifies the requirements for functional safety for Home and Building Electronic Systems (HBES) products and systems, a multi-application bus system where the functions are decentralised, distributed and linked through a common communication process.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	JTC 1