Electronic AirGap integrates into the zones-and-conduits architecture defined by IEC 62443. Positioned as a conduit between two zones with different security levels, it provides a level of protection corresponding to the highest Security Levels (SL-3 to SL-4).

The zones-and-conduits model in practice

IEC 62443 is based on a clear principle: group assets by security requirement level (zones) and strictly control communications between zones (conduits). Each conduit must guarantee a target security level (Security Level Target) appropriate to the threat.

Why Electronic AirGap meets SL-3 / SL-4 levels

  • The protocol break ensures physical isolation—the highest level of protection against intentional breaches using sophisticated means.
  • Dual independent access controls (inbound/outbound) meet the standard’s requirements for granular control.
  • The principle of least privilege is respected: only explicitly authorized business flows are allowed.

Electronic AirGap protects critical zones (PLCs, SCADA, Historian) while allowing necessary operational traffic. Its deployment without modifying the existing architecture enables progressive compliance, even in legacy environments where equipment replacement is not feasible.

Key takeaway — In the IEC 62443 model, Electronic AirGap acts as a high-security conduit (SL-3/SL-4) between critical zones and at-risk zones. Deployment is possible without overhauling the existing architecture.