According to IEC 61511, what is the difference between a Safety Instrumented System (SIS) and a Basic Process Control System (BPCS)?
-
A
A SIS uses only analog instruments while a BPCS uses digital systems
-
B
A SIS is designed to bring the process to a safe state upon demand, independent of the BPCS
-
C
A BPCS has a higher Safety Integrity Level (SIL) requirement than a SIS
-
D
A SIS and BPCS share hardware to reduce cost per IEC 61511 requirements