Functional Safety

functional safety

Verified and validated functional safety

In an ever-more complex world of converging technologies, the safe operation of machines and products increasingly depends on the safety of hardware, software and management systems. ‘Functional safety’ is the aspect of the overall safety of a system or piece of equipment that relates to the machines or products operating correctly in response to their inputs, including the safe management of possible operator errors, hardware failures and environmental changes.

Verification and validation work is carried out during the design and installation phase. At DEKRA, we then devise an assessment plan covering the entire product life cycle. This includes reviews of the management, hardware and software requirements, design process, verification testing, documentation and complete technical construction file.

Why DEKRA?

  • One-stop shop for expertise in all technologies: One-stop shop for expertise in all technologies (embedded, electronics, informatics, mechanics, hydraulic, pneumatic)
  • Complete functional safety: From certification of safety sensors and safety PLCs to complete functional safety of systems and machines.
  • Field data and/or field testing: Determination of parameters by field data and/or field testing (SFF, B10, MTTF, λ).

At DEKRA we also perform partial certifications of individual safety functions for embedded hardware and software systems, amongst other things. This service ranges from practical component testing and determining safety parameters for hydraulic, pneumatic and (electro-) mechanical components (B10D, MTTFD and λD) to validation of the fundamental and proven safety principles set out in Annex A-D of EN ISO 13849-2 as far as validation and verification of fault exclusion. Furthermore, we offer statistical failure analysis such as Weibull and Chi².

We test among others:

  • Electronic safety related systems
  • Safety sensors and safety control systems
  • Machinery
  • Agriculture and forestry machines
  • Gas detectors
  • Robots
  • Medical devices
  • Road vehicles
  • Industrial communication nets
  • Wind turbines
  • Process industry

Selected recognitions:

  • IEC 61508
  • IEC 62304
  • IEC 13849
  • IEC 62061
  • IEC 61800-5-2
  • ISO/IEC 14762
  • IEC 61131-6
  • IEC 61784-3
  • ISO 25119 / EN 16590
  • EN ISO 10218
  • EN 61400
  • IEC 61511
  • ISO 26262
  • IEC 60730-1
  • IEC 60079-29-3

Our testing services in detail

How safe is a product when a safety-related function fails? In the case of elements intended to perform safety functions in the product, this aspect is dealt with by the IEC 61508 standard, for example. That standard offers guidance for reduction of non-tolerable risks based on hazard and risk analyses, and can be applied to both the physical layer – hardware integrity – and the software layer.

Functional safety for machines refers to safety aspects of a machine or system relating to the correct functioning of control devices and guards. Two standards can be applied for this: the IEC 62061 (functional safety of safety-related electrical, electronic and programmable electronic control systems) and ISO 13849 (safety-related parts of control systems).

ISO 13849 covers the entire safety function with all devices involved. It is applicable to safety-related control components and all types of machines, irrespective of the technology and energy used. The standard describes the determination of the Performance Levels (PL) for safety-relevant control components based on designated categories for the scheduled service life.

IEC 62061 (functional safety of safety-related electrical, electronic and programmable electronic control systems) is the standard for designing electrical safety systems. It includes recommendations for the design, integration and validation of safety-related electrical, electronic and programmable electronic control systems for machinery. Implementing this standard means the entire safety function must meet the defined requirements.

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