Can photoelectric sensor and safety grating be substituted

The working principle of the photoelectric sensor; the photoelectric switch is abbreviated as the photoelectric proximity switch, which utilizes the shielding or reflection of the light beam by the detected object, and then gates the circuit through the synchronization loop, thereby realizing the detection of the presence or absence of the blocked object. It converts the input current signal into a photoelectric signal output on the transmitter, and the receiver detects whether there is an object to be detected according to the intensity of the received light.

The working principle of safety grating: In a grating, its photoelectric transmitter emits rows of synchronized and parallel infrared light beams, and then these light beams are received by the corresponding receiving unit. If something is known to enter the sensing area, then the rows of synchronized infrared beams will be blocked, it is possible to block one or more infrared beams, then the normal reception of the receiving unit is interrupted, so the grating control logic is The emergency stop signal of the target machine is automatically issued. In summary, the two work principles are similar, but there is a big difference in their usage philosophy. The former is to detect the presence of objects, while the latter is to prevent unknown objects from entering the dangerous area. Therefore, the difference between a safety grating and a photoelectric sensor lies in the design concept. The safety grating is different from the photoelectric switch in that it has a self-checking function to supervise the failure of its internal grating system. Once an internal failure occurs, it will immediately send an emergency stop signal to the target machine.