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Exida has certified the product reliability and the design and engineering processes for the Emerson DeltaV SIS process safety system as Safety Integrity Level (SIL) 3 capable per IEC 61508.

This demonstrates that the design and development processes used for the DeltaV SIS Logic Solver, and its Relay, Relay Diode and Voltage Monitor modules meet the requirements of the IEC 61508 safety standard, enabling safer operations in critical applications.

Exida performed a Failure Mode Effect and Diagnostic Analysis (FMEDA) – a structured, quantitative analysis that predicts failure rates, modes and diagnostic coverage, and their effects on system operation.

The analysis was verified by fault injection testing.

The FMEDA results provide SIS designers with the detailed reliability data required for SIL Verification.

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