ISA/IECISA/IEC 62443IEC 62443: Zones, Conduits & Security LevelsEASYFree question
A manufacturing plant has both safety instrumented systems (SIS) and basic process control systems (BPCS). Should they be in the same zone?
- A.Only if they use the same network
- B.No, SIS should be in a separate zone due to its higher security and safety requirements
- C.It does not matter
- D.Yes, they control the same process, a consideration that only matters when a safety instrumented system shares physical infrastructure with a basic process control system, a sharing arrangement that this question does not describe
Why B is correct
Safety instrumented systems should be in a separate zone from BPCS due to their critical safety function and higher security requirements.
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