ISA-95 compliant industrial architecture integrates OT and IT networks using AVEVA PI System for real-time data collection and analysis. PLCs and SCADA systems in the OT network connect through firewalls to PI Interfaces and Connectors in a DMZ, feeding data to PI Data Archive, PI AF Server, and PI Analysis for calculation and visualization. Multiple manufacturing sites connect through VPN gateways to a centralized integration layer with load-balanced Central PI Data Archive, Central PI AF, and Central PI Vision for enterprise-wide visibility. This architecture demonstrates defense-in-depth security with segmented networks, multiple firewall layers, and DMZ isolation—critical for protecting industrial control systems while enabling data-driven operations. Fork this diagram on Diagrams.so to customize for your multi-site manufacturing environment, adjust security zones, or export as .drawio for integration with your plant documentation.