WHAT ARE IEC 61508, EN 50126, EN 50128 AND EN 50129?
The IEC 61508 series covers the international standard for all applications involving protective functions that are realized with the aid of electrical, electronic and programmable electronic devices. The IEC 61508 standard specifies the requirements for the design, integration, operation and maintenance of a system to provide the required SIL level.
IEC 61508 SERIES CONSISTS OF SEVEN PARTS:
- IEC 61508-1, General requirements
- IEC 61508-2, Requirements for protection systems using electrical, electronic and programmable electronic devices
- IEC 61508-3, Requirements for software
- IEC 61508-4, Definitions and abbreviations
- IEC 61508-5, Example methods for determining the SIL level
- Implementation guidelines of IEC 61508-6, IEC 61508-2 and IEC 61508-3 standards
- IEC 61508-7, Overview of techniques and measurements
The IEC 61511 standard specifies functional safety requirements in the process industry. It was developed based on the IEC 61508 standard. The IEC 61511 standard is used by end users to ensure system safety for the entire life cycle of the system.
IEC 61511 STANDARD CONSISTS OF THREE PARTS:
- IEC 61511-1, Definitions, system, hardware and software requirements
- IEC 61511-2, Application guidelines
- IEC 61511-3, Guidance for determining the required SIL level
The EN 50126 (IEC 62278) standard specifies the RAMS parameters of a railway. The RAMS parameter refers to the degree of Reliability, Availability, Maintainability and Safety in railway applications.
EN 50128 (IEC 62279) specifies technical requirements and procedures for the development of programmable electronic systems for the control and safety of railways.
EN 50129 (IEC 62425) standard covers standards for signaling systems, subsystems and equipment within the safety units of rail systems. This standard covers the specification, design, manufacture, installation, delivery, operation, maintenance and modifications of all signaling systems.