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IEC 61508
EN 50128
FDA 510(k)
IEC 62304

IEC 61513
IEC 62061
ISO 26262
DO 178C
SAFERTOS® is a safety certified Real Time Operating System (RTOS) for embedded processors. It delivers superior performance and pre-certified dependability, whilst utilizing minimal resources.

  • Developed by WITTENSTEIN high integrity systems, a FreeRTOS partner that specialises in safety
  • Supports a wide range of international development standards
  • Based on the FreeRTOS functional model, so it’s easy to use
  • Available pre-certified to IEC 61508 SIL 3 by TÜV SÜD
  • See the WHIS partial customer list
SAFERTOS is delivered with a Design Assurance Pack (DAP) which contains every design artefact produced during the full development life cycle. The DAP ensures an easy route to achieving certification of SAFERTOS once integrated into a Safety Critical device.

Download the free manual - Upgrading from FreeRTOS to SAFERTOS.

SAFERTOS for Medical Devices

For medical applications SAFERTOS is supplied with a Design History File (DHF). The DHF has been independently validated for compliance with FDA510(k) Class III medical device standards and EN62304. SAFERTOS provides developers with a responsive, deterministic embedded RTOS, containing features that assist in the development of Medical Devices.

SAFERTOS enables dual and multicore/processor medical device designers to create seamless, mixed safety criticality designs quickly and efficiently. With its imperceptible boot time SAFERTOS is ideally suited for use on the primary core, allowing the system to boot and configure itself securely before enabling other cores.

SafeRTOS for medical devices

Common SAFERTOS applications:

  • Infusion Pumps
  • Dialysis Machines
  • Insulin Pumps
  • Prostheses
  • Liver Perfusion Machines
  • Ventricular Assist Devices
  • Endoscopes
  • Cardio-vascular/Hypertension Monitors
  • Hemostasis Machines

SAFERTOS for Industrial

SAFERTOS was initially certified to the Industrial safety standard IEC 61508 SIL3 by TÜV SÜD in 2007. Since then, WHIS has routinely re-certified SAFERTOS to IEC 61508 on many different compiler/processor combinations.

IEC 61508 is a generic Industrial safety standard supporting the design, development and operation of electrical, electronic, and programmable electronic systems. Different industries (see figure) have created their own sector specific standards based on IEC 61508.

IEC61508 certified safety RTOS

All SAFERTOS ports delivered with a DAP comply with the requirements of IEC 61508 SIL 3. SAFERTOS and the DAP also support certification to the domain specific adaptations of IEC 61508, with compliance demonstrated by the use of cross-referencing matrixes and/or independent certification.

Relationship to FreeRTOS

SAFERTOS is based on the functional model of FreeRTOS, however SAFERTOS is not FreeRTOS. SAFERTOS has been re-engineered by the WHIS team of safety experts to provide a safe and secure RTOS. The WHIS engineers took the FreeRTOS functional model, subjected it to a full HAZOP, identified all areas of weakness within the functional model and API, and generated a set of safety requirements. The resulting functional and safety requirements sets were put through an IEC 61508-3 SIL 3 development life cycle, the highest possible for a software only component, creating the SAFERTOS code base and DAP.

To understand the full process that created, and continues to ensure, the safety of SAFERTOS, please click here.

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