Dust and gas hazards both require area classification, but dust layers, hybrid mixtures, and housekeeping rules add site-specific complexity beyond equipment marking alone.
This article highlights considerations for Cybersecurity for OT Devices in Classified Areas under compliance & audits themes. It is educational and not a substitute for project-specific standards, certificates, or AHJ rulings.
Gas groups (IIA, IIB, IIC) and dust groups (IIIA, IIIB, IIIC) constrain equipment selection; mismatched groups are a frequent cause of project rework.
IEC 60079-0 establishes general construction and testing requirements; part-specific standards (60079-1, 60079-7, 60079-11, etc.) add detailed rules for each type of protection.
Wireless, Ethernet-APL, and battery-powered devices need the same EPL and protection concept discipline as conventional fixed installations.
Map your equipment EPL and type of protection to the classified area, then verify installation conditions of use, cable entries, grounding, and maintenance intervals. Keep declarations and certificates version-controlled.
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