Simplified Iec Risk Assessment Calculator Sirac

The calculator tells you the target. You must now design a safety system (light curtains, safety PLC, interlocking gates) that meets SIL 3 / PL e.

SIRAC streamlines the risk assessment process by automating the core logic of IEC 62061 and its companion, ISO 13849-1. Instead of wrestling with multi-page worksheets, users answer a handful of structured questions about a machine hazard:

From these inputs, SIRAC calculates a Risk Level (Low, Medium, High) and—crucially—recommends a required Performance Level (PLr) or Safety Integrity Level (SIL) for the safety-related control system. simplified iec risk assessment calculator sirac

Hazard: Operator reaching into closing die zone during setup.

| Parameter | Assessment | Score | |-----------|------------|-------| | S | Death/crushing possible | 2 | | F | Occurs every shift | 2 | | P | Avoidance impossible once stroke starts | 2 | | Pr | High probability of event | High | The calculator tells you the target

SIRAC Output: Risk Class 5 → Requires SIL 3 safety function (e.g., light curtain + safe PLC + dual-channel monitoring).

In the world of machinery safety, the IEC 62061 standard provides a rigorous framework for assessing risk. However, its formal methodology—requiring detailed parameter scoring (Severity, Frequency, Avoidance, Probability) and complex calculations—can be daunting for small to medium-sized enterprises or for early-stage design reviews. From these inputs, SIRAC calculates a Risk Level

Enter the Simplified IEC Risk Assessment Calculator (SIRAC) . While not an official IEC product, SIRAC represents a growing class of practical tools designed to democratize functional safety.

Traditional risk assessment involves complex matrixes that can lead to "paralysis by analysis." SIRAC reduces cognitive load by:

By mastering the Simplified IEC Risk Assessment Calculator, you move from reactive safety to proactive, compliant, and truly safe machine design. Don’t wait for an incident to validate your risk assessment—use SIRAC to prevent it.

Disclaimer: This article is for informational purposes only. Always consult a certified functional safety engineer (CFSE) for final validation of safety-critical systems.