The structural form of LJE210-120NA proximity switches can be divided into cylindrical, square, groove, perforated (through), and separated types according to their external shape. The cylindrical type is more convenient to install than the square type, but its detection characteristics are the same. The detection position of the groove type is on the inner side of the groove, used to detect objects passing through the groove. The through type is rare in China, but it is more commonly used. It can be used for small parts such as small screws or balls, and buoys to assemble into water level detection devices. Proximity switch wiring diagram 1) There is a difference between two wire and three wire systems for 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 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 subject to working conditions. When conducting, the switch itself generates a certain voltage drop, and when cutting off, there is also a certain 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& lquo; Normally open; rquo; And& lquo; Normally Closed; rquo; If the signal is simultaneously led out or the function is added, please wire it according to the product manual& LJE210-120NA Proximity Switch Buried and Non Buried: Inductive proximity switches are divided into two types based on their installation methods: embeddable (buried) and non embeddable (non buried). The difference between embedded type is as follows: it can be embedded for installation, and the detection surface and surrounding metal can be flush without affecting the performance of the proximity switch; The relative detection distance is relatively short. Non embedded installation is not allowed, and the detection surface and surrounding metal cannot be flush, leaving a certain amount of space, otherwise it will affect the performance of the proximity switch; The relative detection distance is relatively long. GH1-333QE、GH1-433QF、GH1-233QG、GH1-233QH、GH1-233QK、GH1-233QX、GH1-334QA、GH1-334QB、GH1-434QC、GH1-334Q、GH1-334QE、GH1-434QF、GH1-234QG、GH1-234QH、GH1-234QK、GH1-234QX、GH1-335QA、GH1-335QB、GH1-435QC、GH1-335Q、GH1-335QE、GH1-435QF、GH1-235QG、GH1-235QH、GH1-235QK、GH1-235QX、GH1-336QA、GH1-336QB、GH1-436QC、GH1-336Q、GH1-336QE、GH1-436QF、GH1-236QG、GH1-337QA、GH1-337QB、 Marine limit switch LX915-11 LX915-12 stroke open
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