Practical guide · 9 pages

Purdue, IEC 62443 and connected industry.

Designing boundaries and operating dependencies across OT, IoT, edge and cloud.

Quokka Advisory

Purdue, IEC 62443
and connected industry

Keep control, quality and safety in view.

Practical guide · October 2026

Start with the operation.

Connected sensors, remote support and cloud services introduce dependencies that operators have to manage. This guide connects the familiar Purdue view to risk assessment, zones and conduits, then follows the design into edge and cloud systems.

It includes three editable diagrams and an acceptance checklist for testing the behaviour the operation will rely on.

Functions, boundaries
and connections.

Use each view for a different design question.

Purdue-style functional levels from physical process to business planning — Functional levels describe the work; they do not establish security trust.

Corporate, industrial exchange and control zones connected by defined conduits — Define protection for each conduit according to the assessed risk.

Illustrative telemetry path from local operation through an edge collector and industrial exchange to cloud analytics — Assess monitoring, maintenance and control paths separately.

Use it in the
design review.

The guide covers Industry 4.0 and 5.0, industrial IoT and cloud connections, with questions about local control, stale data, recovery, accountability and handover.

Quokka guidance with references to NIST, IEC, ISA and other primary sources. Use these design patterns alongside the standards and assessment scope that apply to your environment.

Explore the IEC 62443-3-3 mapping guide

Put the guide to work in your environment.

We can help connect the requirements to a practical next step.

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Purdue, IEC 62443 and connected industry.