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سوئیچ سنسور مغناطیسی LJ12A3-4-Z/BX
مشخصات فنی
Model: LJ12A3-4-Z/BX non-buried, high head
name: Inductive proximity switch
Shape: 12 mm diameter cylinder
Detection distance: 4 mm
Detecting Objects: Metal/Iron
Working voltage: Within 6-36VDC
Output method: DC three-line NPN is normally open
Output current: 300 mA
Shell material: metal / copper
Functional use: The LJ series proximity switch (also known as the non-contact travel switch) acts when it is close to metal and is widely used in the control of machine tools and other equipment.
working principle:
The proximity switch consists of three major components: an oscillator, a switching circuit, and an amplifying output circuit. The oscillator produces an alternating magnetic field. When the metal target approaches this magnetic field and reaches the sensing distance, eddy currents are generated in the metal target, causing the oscillation to decay and even stop. The oscillation and oscillation of the oscillator are processed by the post-amplifier circuit and converted into a switching signal to trigger the drive control device to achieve the non-contact detection purpose. The closer the target is to the sensor, the closer the target is to the sensor, the greater the damping inside the coil; the larger the damping, the smaller the current of the sensor oscillator. The current loss of the inductive proximity switch decreases with the distance from the metal target And decrease.
The difference between normally open (NO) and normally closed (NC):
First, normally open (NO) is the signal output line is off state under normal state, no signal output, closed when the object is sensed, output signal.
Second, normally closed (NC) is the signal output line in the normal state is closed state, continuous signal output, when the object is sensed, it is disconnected and the signal is turned off.
The above two are selected according to the actual needs of the customer.
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