The brown line of the universal photoelectric switch is +24V, the blue line is the negative pole of the power supply, and the black line is the signal output. According to different models, when an object reflects light, it outputs a short circuit or an open circuit signal.
The photoelectric switch converts the input current into an optical signal on the transmitter and emits it, and then the receiver detects the target object according to the intensity of the received light. Photoelectric switch smoke alarm is a common type of security system, which is often used in industry to count the action times of manipulator.
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Photoelectric switch has been used in many fields, such as crop liquid level detection, liquid level control, product counting, width discrimination, speed detection, fixed-length shearing, hole identification, signal delay, automatic door induction, color code detection, punching machine and shearing machine, safety protection and so on. In addition, it can also be used as an anti-theft alarm in banks, warehouses, shops, offices and other necessary occasions by taking advantage of the concealment of infrared rays.
The commonly used infrared photoelectric switch uses the reflection principle of the object to detect the existence of the object by sensing the intensity of the reflected light through the synchronous loop. The photoelectric sensor first sends out an infrared beam to reach or pass through the object or mirror to reflect the infrared beam, and the photoelectric sensor receives the reflected beam to judge the existence of the object according to the intensity of the beam.
There are also many kinds of infrared photoelectric switches, generally speaking, there are mainly mirror reflection photoelectric switches, diffuse reflection photoelectric switches, slot photoelectric switches, anti-radiation photoelectric switches and optical fiber photoelectric switches. Includes automatic selection of photoelectric switch.
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