Safety systems must perform even in the event of failures such as shorted circuits, power failures, electrical disturbances or stuck valves. A method of controlling risk is by preventing electrical failures from causing a hazardous situation.

In this topic, you will learn about:

• Performance requirements for a safety system
• Safety system design
• The concept of "Control Reliability"
• The concept of Categories
• Animation: Safety circuit integrity levels
• Monitoring functions
• Reliability and safety of a circuit
• Minimum design requirements
• Which method to choose