CLC IEC/prTS 61508-3-1

Functional safety of electrical/electronic/programmable electronic safety-related systems – Part 3-1: Software requirements – Reuse of pre-existing software elements to implement all or part of a safety function

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.