IEC 62443: Zones and Conduits — Partitioning a Plant Step by Step

Date
2026-11-03
Location
Online
Host
Zach L

About this event

A live 30-minute expert session on Zones and Conduits — Partitioning a Plant Step by Step (IEC 62443 — Industrial Cybersecurity). What We'll Cover: What zone and conduit partitioning is and where ZCR 3 sits in the IEC 62443-3-2 risk assessment workflow The partitioning method step by step: group assets by shared security requirements, separate safety systems, isolate temporarily connected devices, define conduits How the partition maps to IEC 62443-3-2 ZCR requirements and the zone and conduit diagram plus zone characteristics documents it produces Common mistakes: flat networks disguised as zones, forgetting wireless and dial-in conduits, lumping SIS into the BPCS zone The traceability an assessor looks for: every asset assigned to exactly one zone, every inter-zone data flow captured as a conduit with rationale Related topics: zones and conduits · iec 62443-3-2 · network segmentation · ot security architecture · zone partitioning · conduit definition · iacs zoning · safety system separation · purdue model · security zoning workshop · zcr requirements · plant network design Critical Systems Analysis provides embedded functional safety consulting for IEC 62443 — Industrial Cybersecurity. Learn more: https://criticalsystemsanalysis.com Partner with us: https://meetings.hubspot.com/benjamin-twombly/strategic-partnerships

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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.