Functional safety of electrical/electronic/programmable electronic safety-related systems - Software requirements. Reuse of pre-existing software elements to implement all or part of a safety function

Functional safety of electrical/electronic/programmable electronic safety-related systems - Software requirements. Reuse of pre-existing software elements to implement all or part of a safety function

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1   Scope

This Technical Specification presents requirements by the application of which pre-existing software elements may be claimed to be proven-in-use for all or a part of safety function(s) of SIL1 or SIL 2.