IEC 62443 for Machinery
IEC 62443 can support machinery cybersecurity evidence when the machine includes industrial automation and control system elements. It does not replace Regulation (EU) 2023/1230. The machinery file still needs to show how protection against corruption prevents hazardous situations.
IEC 62443 fit
ISA describes the ISA/IEC 62443 series as standards for implementing and maintaining electronically secure industrial automation and control systems. That makes the series useful for machine control systems, industrial components, secure development processes, and system architectures that interact with safety-related control.
IEC 62443-3-2
Supports IACS security risk assessment, system partitioning, zones, conduits, and target security levels.
IEC 62443-3-3
Supports system security requirements and security levels for an industrial automation and control system.
IEC 62443-4-1
Supports secure product development lifecycle evidence for products and systems used in machinery.
IEC 62443-4-2
Supports technical security requirements for IACS components such as embedded devices, hosts, network devices, and software applications.
prEN 50742 Approach B
The local prEN 50742 draft uses Approach B for machinery developed in the context of EN IEC 62443-3-3, EN IEC 62443-4-1, and EN IEC 62443-4-2. In that draft mapping, the IEC 62443 work supports the machinery system, machinery components, and secure-development process.
The system evidence should identify the machine control system boundary, safety-related functions, external interfaces, and any zones or conduits that protect the safety function from corruption.
Component evidence should show which IACS components affect safety functions and which component requirements or compensating countermeasures support the machinery safety conclusion.
Secure-development evidence is useful when it is tied to the machinery software, firmware, update mechanism, configuration, and vulnerability handling that affect safe operation.
Machinery Regulation limit
A certificate, security level, component claim, or corporate security programme is not the same as Annex III compliance. The machinery file still needs to identify the safety-relevant software, data, configuration, control function, interface, and hazardous situation.
IEC 62443 evidence is strongest when it is mapped to a named machine architecture. It is weaker when it stays at the level of a plant-wide policy, enterprise network diagram, or component datasheet without a safety-function link.
Useful mapping
A practical IEC 62443 mapping for machinery normally connects four layers. Each layer should stay traceable to protection against corruption and to the safety requirement it supports.
Architecture
Machine boundary, zones, conduits, external services, service tools, and remote access paths.
Safety function
The stop, mode, limit, interlock, safe state, or protective measure that corruption could affect.
Component
Controller, embedded device, host, network device, software application, or safety component that implements or protects the function.
Lifecycle evidence
Secure development, vulnerability handling, update control, version identification, configuration control, and intervention records.