Security systems in industrial environments may cross the responsibilities of information technology (IT), plant engineering, and operational technology (OT) teams. OT includes the systems used to monitor or control industrial processes. Establish the boundary and change process before connecting systems or reusing production infrastructure.
Part of Enterprise Physical Security Cybersecurity Coordination.
Define the industrial system boundary
Document the security function, required information exchange, responsible system owners, approved communication paths, and operational constraints. Identify whether the intended integration is observation, event exchange, or control. Use the plant’s approved engineering and cybersecurity review process for any connection affecting operational systems.
Respect production and maintenance constraints
Production schedules, vendor support constraints, legacy devices, and limited maintenance windows can complicate changes. Record which systems must remain isolated and how temporary support is approved. Avoid treating spare network capacity as permission to connect a new device or route.
Validate interfaces with responsible teams
Validate the approved interfaces and failure behavior in coordination with the responsible teams. Test the security requirement without assuming authority to interrupt production. Retain diagrams, approvals, support boundaries, and recovery instructions so later security changes do not bypass plant change control.
Related planning resources
- Cybersecurity & Data Protection Standards
- Network Security for Security Systems | VPN & Parallel Infrastructure
- Manufacturing Plant Security Systems
Frequently Asked Questions
When should IT and OT boundaries be agreed for industrial security?
Agree them before connecting security systems or reusing production infrastructure. Identify the responsibilities of IT, plant engineering, operational technology, and security teams. The boundary should include the change and support process.
How should a security interface with plant systems be accepted?
Validate it with the teams responsible for the affected systems and production constraints. Coordinate maintenance windows and supported connections. A technical connection should not leave industrial change authority undefined.
Let’s talk about your next step
Tell us what you want to improve and which locations are involved. We can help you work through the questions, check what your systems support, and define a practical project scope.
Discuss your IT and OT coordination
Compliance, Codes & Project Standards
NERSA plans commercial and industrial security work with applicable code, documentation, inspection and authority-having-jurisdiction requirements in mind. Requirements vary by system, property and jurisdiction. These resources support project planning; they do not establish legal compliance, certification or AHJ approval.
Related guidance: Regulatory compliance & inspection readiness · NERSA project standards · Documentation, testing & inspection readiness