EN 50090-2-3:2005

Introduction
1 Scope
2 Normative references
3 Definitions
4 General requirements
  4.1 General
  4.2 Method of establishment for the requirements
      4.2.1 HBES application environment
      4.2.2 Sources of hazards
      4.2.3 Hazardous events
      4.2.4 Derivation of requirements
5 Requirements for functional safety
  5.1 General
  5.2 Power feeding
  5.3 Environment
  5.4 Life time
  5.5 Reasonably foreseeable misuse
  5.6 Software and communication
  5.7 Remote operations
      5.7.1 General recommendations
      5.7.2 Within a single building or in its immediate vicinity
      5.7.3 From outside the building
      5.7.4 Management
Annex A (informative) Example of a method for the determination
                      of safety integrity levels
Annex B (informative) Hazards and development of necessary Functional
                      Safety Requirements
Annex C (informative) Some examples of non safety related HBES
                      applications
Bibliography
Figure
Tables

This European Standard sets the requirements for functional safety for HBES products and systems, a multi-application bus system where the functions are decentralised, distributed and linked through a common communication process. The requirements may also apply to the distributed functions of any equipment connected in a home or building control system if no specific functional safety standard exist for this equipment or system. The functional safety requirements of this European Standard apply together with the relevant product standard for the device if any. This European Standard is used as a product family standard. It is not intended to be used as a stand-alone standard. This European Standard does not provide functional safety requirements for safety-related systems.