Level 0: Instrumentation
Level 1: Process Control
Level 2: Supervisory Control
Level 3: Advanced Control
Level 3.5: DMZ
Level 4: Plant Information Network
1
Designed for reliability and availability to maintain constant view of the process. It is the backbone for process control and monitoring.
2
Shall be physically and logically separated from lower levels for availability, integrity, security and information protection of significant and mission-critical systems.
3
Consists of programmable logic controllers that sense and manipulate the physical process.
4
The actual physical process, including field instruments and analyzers directly connected to the process equipment.
5
Includes the PCN, and may contain instrument asset management systems, computer authentication and authorization services, process data historian servers, and process alarm management servers.
6
Provides increased security between Level 4 and lower levels using a network-attached firewall.
Level 0: InstrumentationLevel 1: Process ControlLevel 2: Supervisory ControlLevel 3: Advanced ControlLevel 3.5: DMZLevel 4: Plant Information Network1Designed for reliability and availability to maintain constant view of the process. It is the backbone for process control and monitoring.2Shall be physically and logically separated from lower levels for availability, integrity, security and information protection of significant and mission-critical systems.3Consists of programmable logic controllers that sense and manipulate the physical process.4The actual physical process, including field instruments and analyzers directly connected to the process equipment.5Includes the PCN, and may contain instrument asset management systems, computer authentication and authorization services, process data historian servers, and process alarm management servers.6Provides increased security between Level 4 and lower levels using a network-attached firewall.
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