October 2014

Special Report: Process Control and Information Systems

Access before acceptance: Chip redundancy for SIS

Desired automated plant safety functions are implemented via electrical relays, non-programmable solid-state electronics and programmable electronics (PEs) like microprocessors and microcontrollers. I..

Modi, R., Professional engineer

Desired automated plant safety functions are implemented via electrical relays, non-programmable solid-state electronics and programmable electronics (PEs) like microprocessors and microcontrollers. It is essential to consider the system as a whole, from the sensors through control logic and communication systems to final control elements. To protect against overall vulnerability of safety functions in electrical/electronic/programmable electronic (E/E/PE) systems, international standards offer guidance. The standard International Electrotechnical Commission (IEC) 61508 for the functional safety of E/E/PE equipment was established to avoid abnormal occurrences, safeguard society and protect

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