Schmitt-Pauksztat G., Hablawetz D., Knödler M., de-Kerf D., Demski C., Risser M., Dehner U., 2025, Integrating Machinery Safety Functions Into Functional Safety for Process Industry, Chemical Engineering Transactions, 116, 55-60.
From a Process Industry point of view, the integration of Machinery Safety Functions into Functional Safety for Process Safety has always been a challenge. Generally, concepts of IEC 61511 „Functional safety – Safety instrumented systems for the process industry sector” are the basis for safety functions in Process Industry – however these concepts are somehow incompatible with Functional Safety implementations of machines according to IEC 62061 or ISO 13849. Examples are differences in prior use vs. “well-tried safety principles” and proof test approaches and of course the fundamental question of high and low demand of a safety function. Also, the target measure for the risk associated with the two principles are different. One is focusing mainly on very rare events with a high impact where the other is focusing mainly on frequent scenarios with a moderate to low impact.
