ISO 13849: Two-Hand Control and Enabling Devices — Mode-Dependent Safety Function Design

Date
2026-12-01
Location
Online
Host
Zach L

About this event

A live 30-minute expert session on Two-Hand Control and Enabling Devices — Mode-Dependent Safety Function Design (ISO 13849 — Machinery Safety). What We'll Cover: What two-hand control types and enabling devices are and where mode-dependent functions fit the safety concept The design method step by step: synchronous actuation timing, anti-tie-down logic, and enabling device integration in manual modes How ISO 13851 type selection maps to required PL and the mode-and-safeguard matrix documented for the machine Common mistakes: enabling devices that bypass speed limits and two-hand stations positioned inside the hazard zone The mode transition tests and per-mode safeguard evidence an auditor checks for setup, teach, and automatic operation Related topics: two hand control · iso 13851 · enabl

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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

Risk reduction allocation
Distributing required risk reduction among mechanical design, safeguards, control functions and procedures.
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.
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.