Unexpected Start-Up with Robot Systems

If this is not practicable then presence sensing should be used. This can include light curtains, laser scanners, safety mats, radar etc. For small and simple areas this can be very effective in avoiding any undetected individuals within the space. However, again, in large and complex areas this can be difficult to ensure full coverage without blind spots, the affect of light/visibility conditions also needs to be considered, along with the cost implications of presence sensing across a large area.

If the first two options are not practicable, and sometimes in addition if called for by the risk assessment, other protective means should be used to prevent unexpected start-up. Examples include measures to lock a guard in the open position (such as trapped key systems incorporating safety keys or interlock blocking devices), multiple means for the isolation and lockout of the hazardous equipment located within the safeguarded space or time limited reset devices within the safeguarded space to facilitate a walkthrough check before reset.