Most industries involve a measure of risk that can adversely impact human lives. Safety-rated controls and instruments create processing layers involving sensors, logic controllers and final control measures. In the event of a fault, the system is able to enter a safe state to prevent serious injury or death.
In order to design a safety-rated control system, standards such as IEC 61508, IEC 62061 for process-based systems or ISO 13849 (Safety of Machinery) can be used. These outline a roadmap to ensure a system meets the desirable level of risk reduction measures. In both cases, the following items are administered to meet compliance:
- Diverse systems
- High-reliability components
- Redundant systems
- Diagnostic coverage
- Design against common cause failures
- Design against unsafe failed states
- SIL / PLx assessment of safety functions
We use these parameters, along with a hazard analysis and risk assessment to help our clients achieve the objective of a safe, long lasting and functional system whatever it may be.