Choosing Functional Safety Field Instrumentation
Certified, prior use or both? Fundamentals of VDI 2180
Determining the equipment to use in safety instrumented systems (SIS) and the rules for maintaining them is one of the most difficult and controversial topics in the industrial SIS marketplace. Learn more from Siemens industry experts.
Can you justify using safety certified instrumentation?
There is a lot of confusion around Safety Instrumented Systems (SIS) and the associated protection layers. While some may claim that “IEC 61508 certified equipment” is the way to go, others defend the concept of using field data collection and analysis of previously used general purpose instrumentation as the way to select appropriate instruments.
This presentation addresses both philosophies and presents a simplified way to calculate the performance of a Safety Instrumented Function (SIF).
Key takeaways include:
Random vs. systematic failures
Proven in-use vs. prior use
Certified vs. evidence of suitability
Simplified VDI 2180 calculations