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Yokogawa Electric Corporation

Standards

What is the IEC 61511 international standard?

IEC 61511 (2003) is for the process industry sector. In contrast to IEC 61508, which is for device manufacturers and distributors, this standard targets system designers, integrators, and users, specifying the design and engineering requisites and guidelines for required applications.
IEC 61511 is equivalent to the most recent ISA 84 standard, and has been accepted globally, just like IEC 61508.  ProSafe-RS complies with IEC 61511.