FS PRODUCTS » Functional Safety
Functional Safety (FS) = Safety against hazards resulting from a faulty and disturbed functionality. Functionally safe controls and protective equipment are installed and used at all places, where persons, the environment and goods of value have to be protected. Such applications are for instance industrial machines, at which the operators and humans have to be protected against the hazards of dangerous movements and emissions of the machine, chemical plants, railway, automotive, medical devices etc.
The safety has to be ensured under normal / undisturbed conditions and must not get lost in case of abnormal conditions. That means the products have to be designed in such a way, that faults, failures and external influences must not result in an undetected loss of safety.
The objective of Functional Safety is freedom from unacceptable risk of physical injury or of damage to the health of people either directly or indirectly (through damage to property or to the environment). Today the objective is sometimes extended to the protection against damage and destruction of goods of value.
Functional Safety is intrinsically end-to-end in scope in that it has to treat the function of a component or subsystem as part of the function of the whole system. This means that whilst Functional Safety standards focus on Electrical, Electronic and Programmable Systems (E/E/PS), the end-to-end scope means that in practice Functional Safety methods have to extend to the non-E/E/PS parts of the system that the E/E/PS actuates, controls or monitors.
Functional Safety is achieved when every specified safety function is carried out and the level of performance required of each safety function is met. This is normally achieved by a process that includes the following steps as a minimum:
Figure 1: IEC 61508 as the Mother Standard for Functional Safety and derived Sector-Application Standards
Neither safety nor Functional Safety can be determined without considering the system as a whole and the environment with which it interacts. Functional Safety is inherently end-to-end in scope.
Any claim of Functional Safety for a component, subsystem or system should be independently certified to one of the recognized Functional Safety standards. A certified product can then be claimed to be Functionally Safe to a particular Safety Integrity Level or a Performance Level in a specific range of applications: the certificate is provided to the customers with a test report describing the scope and limits of performance.
It is possible to certify both products and processes that manage the lifecycle of the product.
This collection of certified products intended for the use in safety-related applications serves many machine builders and system integrators for the selection of suitable components for the design of safety functions. If you want your safety product be listed in this certificate database please contact us.
Prerequisite and basis for the certification of a Functional Safety Product is an intensive examination of this product by an independent accredited testing laboratory.
Read more about the procedures and the content of the product testing and certification by the BA Automation – Functional Safety.