A PLC Integrated Security Module @S4Events
A PLC Integrated Security Module  @S4Events
Uploaded July 2025 | Updated September 2026, 1 week ago
In 2024 Mitsubishi announced the integration of a security module with Nozomi software into select models of their MELSEC PLCs. This is, to S4's knowledge, the first integration of a security model with access to the PLC backplane. The potential for PLC EDR, VPN, firewall, and very granular OT security capabilities are vast.

S4 invited Kobayashi-san of Mitsubishi to present:
- Why Mitsubishi choose to integrate a security module?
- The different integration options (such as hardware card) and why the current approach was selected
- An architecture overview and the ability to access backplane data and act on backplane data
- A bit of futurecasting on what this means for Mitsubishi, its customers and the industry

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A PLC Integrated Security Module

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