Architectures

Most used Architectures In the following table we show the most used architectures when designing Safety Instrumented Functions (SIF). LogicChannelsHFT (S)HFT (A)ObjetivesUsed for1oo1100 sensor, actuator1oo2210Safetysensor, actuator2oo2201Availabilitysensor, actuator2oo3311Safety+Availab.sensor, PLC1oo2D210Safety with high diagnosticsPLC HFT(S)= Hardware Fault Tolerant for Safety HFT(A)= Hardware Fault Tolerant for Availability Recall that the logic of the sensor and […]

Posted by

Safety Standards

Safety Standards International Standards such as IEC 61508 and IEC 61511 are prepared by committees of experts from different fields and functions, and are not mandatory in the design or manufacturing, unless the end user or local legislation specifies their direct or indirect compliance. As an example, we will say […]

Posted by

Safety Instrumented Function

Safety Instrumented Function The Safety Instrumented Function, whose abbreviation is SIF, is a protection layer whose objective is to achieve or maintain a safe state of the process when a specific dangerous event occurs. The SIF is implemented in the SIS (Safety Instrumented System) which is normally composed of several […]

Posted by

Compliance with IEC 61511

Compliance with IEC 61511 What do we have to do to be compliance with IEC 61511? This Standard introduces the concept of Safety Life Cycle and, therefore, the answer is associated with the fulfillment of each phase of this cycle. Our intention is to explain it, in a simple way, […]

Posted by