Designed to satisfy sure safety requirements, safety controllers monitor other safety devices and shut off power every time a hazard is clear. Each time a light curtain is disturbed by a person or item entering its beams, the device triggers an alert or motion as shown with Omron Automation’s F3SJ https://messiahqvssn.blogsvila.com/28989225/must-have-gadgets-things-to-know-before-you-buy