ISA/IEC 62443
What is ISA/IEC 62443?
ISA/IEC 62443 is a family of standards and guidance that define how to secure Industrial Automation and Control Systems (IACS) across people, process, and technology—covering policies, system design, and component requirements.
Examples
- A plant adopts zones and conduits per 62443 to separate HMIs, PLCs, SIS, and the IDMZ, then sets target Security Levels for each zone.
- Procurement requires service providers to meet ISA/IEC 62443-2-4 and products to meet 62443-4-2 controls; the integrator follows 62443-4-1 for secure development.
Discover 🔎
ISA/IEC 62443 is the industrial world’s playbook for cybersecurity. Unlike a single checklist, it’s a suite that aligns leadership, engineering, operations, and vendors around a common language and set of outcomes. It scales from a single line to multi-site fleets and helps you design defensible architectures, choose secure products, and run a sustainable OT security program.
Summary 📝
ISA/IEC 62443 is a practical roadmap for OT security. It helps you run a program, design segmented architectures with clear Security Levels, and procure components and services that meet those goals. Start with scope and risk, organize zones and conduits, set SL-T, and validate that operations and suppliers sustain the controls over time.
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