In the proximity switch, there is a component that has the ability to “perceive” the object approaching it, that is, the displacement sensor. It can use the sensitivity of the displacement sensor to the approaching object to achieve the purpose of controlling the switch on or off. The object moves from the switch to the switch and the switch. The distance sensed by the displacement sensor after approaching a certain distance is called the detection distance. Sometimes the detected objects approach the switch at a certain time interval and then leave one after another, which is repeated continuously, and the response ability of different proximity switches to the detected object is also different, which is called the response frequency.
Factors of choosing normally closed contacts for emergency stop buttonsThe emergency stop button contacts on electrical equipment are either normally open contacts or normally closed contacts. Therefore, people often ask whether the emergency stop button uses a normally closed contact or whether it uses a normally open contact. The factors are as follows:1. From the moment […]
(1)(Push button switch)Always check the button to remove dirt. Due to the small contact spacing of the button, after years of use or poor sealing, dust or oil emulsion will flow in, resulting in reduced insulation and even short circuit accidents. In this case, insulation and cleaning treatment must be carried out, and corresponding sealing […]
(9) Waterproof button（push button switch): with sealed shell, it can prevent rainwater intrusion. Its code is s. (10) Emergency button(push button switch): a large red mushroom button head protrudes outside, which can be used as a button to cut off the power supply in case of emergency. Its code is j or m. (11) Open […]
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