IEC 61508 / 61511 Functional Safety
The standards governing the safety-instrumented system and its integrity level.
- Governs
- Safety interlocks (SIL)
IEC 61508 and 61511 govern functional safety — the design and verification of safety-instrumented systems to a defined safety-integrity level. They apply to the interlocks that protect a fusion machine, and their verification is a scheduled qualification task.
Kronos sets SIL targets for its protective systems and treats verification as gate work.
Common questions
They govern functional safety — how safety-instrumented systems are designed to reliably bring a plant to a safe state. Kronos's independent safety controller is built to this framework.
Because a safety system must be independent of the control and machine-protection systems it backs up, which is exactly what these standards require.