Typical uses for safety gratings include:
The luminescent device emits several invisible infrared beams, and the receiver receives the infrared beams from the luminescent device, forming a rectangular detection curtain. The whole grating is detected by beam-by-beam scanning. Any opaque object larger than a certain size (such as a part of the operator’s body, opaque workpiece, etc.) invading the light curtain area, will cause shading. When the safety grating detects the blackout, it will enter the “abnormal” state – interrupt output (such as relay from closed to open state, transistor into cutoff state, etc.) within 20ms of response time.