Temperature Expansion Proximity Switch QT15-M30-CP1-PNP Product Description: A proximity switch is a position switch that can be operated by mechanical direct contact with moving parts. When an object approaches the sensing surface of the switch to the operating distance, it does not require mechanical contact or any pressure to activate the switch, thereby driving DC electrical appliances or providing control commands to computer (PLC) devices. Working principle of temperature expansion type proximity switch QT15-M30-CP1-PNP: This type of switch is sometimes also called an inductive proximity switch. It utilizes a conductive object to generate eddy currents inside the object when approaching a proximity switch that can generate an electromagnetic field. This eddy current reacts on the proximity switch, causing changes in the internal circuit parameters of the switch, thereby identifying whether a conductive object is moving closer and controlling the on or off of the switch. The object that can be detected by this proximity switch must be a conductive body. Wiring instructions: 1) There is a difference between two wire and three wire proximity switches. Three wire proximity switches are further divided into NPN and PNP types, and their wiring is different. 2) The wiring of the two wire proximity switch is relatively simple. The proximity switch is connected in series with the load and then connected to the power supply. 3) Wiring of the three wire proximity switch: connect the red (brown) wire to the positive end of the power supply; Connect the blue wire to the 0V end of the power supply; The yellow (black) line represents the signal and should be connected to the load. The other end of the load is connected as follows: for NPN type proximity switches, they should be connected to the positive end of the power supply; For PNP type proximity switches, they should be connected to the 0V end of the power supply. 4) The load of proximity switches can be signal lights, relay coils, or digital input modules of programmable logic controllers (PLCs). 5) Special attention should be paid to the type selection of the three wire proximity switch connected to the PLC digital input module. PLC digital input modules can generally be divided into two types: one type has a common input terminal that is the negative pole of the power supply, and the current flows out from the input module. In this case, NPN type proximity switches must be selected; Another type of common input terminal is the positive pole of the power supply, and the current flows into the input module. At this time, it is necessary to choose a PNP type proximity switch. Don't make the wrong choice. 6) The two wire proximity switch is limited by working conditions, and when conducting, the switch itself generates a certain voltage drop. When cutting off, there is also a certain amount of residual current flowing through. Therefore, consideration should be given when selecting it. Although the three wire proximity switch has an additional wire, it is not affected by adverse factors such as residual current and works more reliably. 7) Some manufacturers will approach the switch's&quo; Normally open; And&quo; Normally Closed; If the signal is simultaneously led out or other functions are added, please wire according to the product manual. Buyers must read: When receiving the goods, regardless of whether the packaging is damaged, be sure to check in person whether the items are intact or missing. If there are any problems, communicate with us immediately. Our company: treats people with integrity. We are engaged in PIFA business and provide quotes without any significant profits. Position,. 1 year. Logistics: SF Express, Shentong Express, Yuantong Express, Zhongtong Express, Tiantian Express, EMS Postal Express, and Quanguo Rail Transit. The online quotation is inaccurate, the technical parameters of the published product information are not detailed, and the product images corresponding to the model may not be correct. The product model shall prevail. Please contact us for consultation and the actual quotation shall prevail< Br/>Zhuoxin is my home, and getting rich depends on everyone. Welcome to order Zhuoxin sensors& nbsp;