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SAFETY INSTRUMENTED SYSTEMS (SIS)

Safety Instrumented Systems (SIS) also known as “Interlocks”, are utilized in hazardous processes for protection and to reduce the risk of accidents.

The implementation of SIS, drives the plant in safe condition.

SIS consist of three essential elements: Sensors systems, Controllers and Actuator systems:

Safety Instrumented Systems (SIS) also known as “Interlocks”, are utilized in hazardous processes for protection and to reduce the risk of accidents.

The implementation of SIS, drives the plant in safe condition.

SIS consist of three essential elements: Sensors systems, Controllers and Actuator systems:

These elements form an SIS chain and are valued in terms of their functional safety.

To achieve this, a very complex and exhaustive process is defined in standards IEC 61508 and IEC 61511.

The SIS must assess and analyse both the hardware and the software using several techniques,  such as: