Principles, Standards and Implementation

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Protective Measures and Complementary Equipment

Protective Measures Preventing Access Detection Devices Safety Switches Guard Locking Switches
Non-Contact Interlock Switches Hinge Switches Position (Limit Switch) Interlocks Trapped Key Interlocks Operator Interface Devices
Logic Devices Integrated Safety Controllers Safety Networks Output Devices Connection Systems
Protective Measures

When the risk assessment shows that a machine or process carries a risk of injury, the hazard must be eliminated or contained. The manner in which this is achieved will depend on the nature of the machine and the hazard. Safeguards are defined as methods that either prevent access to a hazard or detect access to a hazard. Safeguards include devices like fixed guards, interlocked guards, light curtains, safety mats, two-hand controls and enabling switches.