ISO 13849: Presence-Sensing Devices — Light Curtains, Scanners, and the Safety Distance Calculation

Date
2027-06-30
Location
Online
Host
Zach L

About this event

A live 30-minute expert session on Presence-Sensing Devices — Light Curtains, Scanners, and the Safety Distance Calculation (ISO 13849 — Machinery Safety). What We'll Cover: What ESPE Type 2/4 devices are and where presence sensing enters safety function design instead of physical guarding The ISO 13855 calculation step by step: response time chain, K constants, intrusion allowances, and mounting height checks How device Type pairs with achievable PL and the safety distance calculation sheet added to the technical file Common mistakes: forgetting drive stop time in T, floor-mounted scanners with unverified response times, and reachable-over gaps The measured stop-time report and distance verification an auditor wants for every light curtain installation Related topics: light curtain · safe

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About Functional Safety Foundations

This online session delivers expert-led instruction on the regulatory landscape and implementation approach for Functional Safety Foundations.

The cross-sector fundamentals underlying every functional safety standard: risk as severity × likelihood, the safety function concept, integrity levels, the safety lifecycle, and the split between random and systematic failures.

What it regulates

Shared vocabulary and reasoning: hazard → risk → risk reduction allocation → safety requirement → verified implementation → maintained integrity in operation.

Who must comply

Everyone entering the field — the conceptual base of the entire catalog.

Key requirements of Functional Safety Foundations

  • Hazard and risk fundamentals
  • Safety function anatomy: sensor-logic-actuator with defined safe state
  • Integrity ladders (SIL/PL/ASIL/DAL) as risk-reduction currencies
  • Random vs systematic failure treatment
  • Lifecycle and management of functional safety incl. competence

Key concepts: Functional Safety Foundations

Functional safety management
Planning, competence, documentation and assessment wrapped around technical work.
Random vs systematic
Hardware wear-out/chance failures quantified statistically versus design/process errors controlled by rigor.
Risk reduction allocation
Distributing required risk reduction among mechanical design, safeguards, control functions and procedures.
Safe state
The defined condition a function drives the equipment to on demand or fault.

Frequently asked questions: Functional Safety Foundations

Why can't testing alone prove safety?

Rare-event targets (like 1e-7/h) are unverifiable by test duration, and systematic errors evade random testing — hence the standards' dual machinery of quantified hardware analysis plus process rigor and independent assessment.

Standard information based on the published text of Functional Safety Foundations. Event content is provided by the host. For authoritative guidance, consult the official standard body.