Bk (black) black, wh (white) white, bn (brown) brown, rd (red) red, ye (yellow) yellow, bu (blue) blue, gy (gray) gray, gn (green) green and so on.
What do bk, bu and bn in the proximity switch mean respectively? How to determine which two are power lines? BK black: generally, it is the output line, and the output is always on.
BN Brown: Generally, the power cord is connected to the positive pole of the power supply.
Braun: Generally, it is a power cord, which is connected to the negative pole of the power supply.
BW White: Generally, it is the output line, and the output is normally closed.
NPN: Black terminal is connected to the load, and the other end of the load is connected to the positive pole of the power supply.
PNP: The black end is connected to the load, and the other end of the load is connected to the negative pole of the power supply.
NPN, PNP and normally open and normally closed problems in proximity switch. What are the NPN, PNP, normally open and normally closed problems of proximity switches? This statement is based on the switching characteristics of triode, and we take zero potential as the normal state.
Then under normal circumstances, the B pole of NPN is 0V, IB=0 off and normally on.
PNP transistor, B=0, generally the triode is saturated, that is, conducting, so it is normally closed.
If you have the concept of normally open and normally closed in this picture, that is the definition given by the internal program, which is to excite the B pole, so there is a state.
On the diagram, if the B poles are all zero potential and both output high level, there is no difference between them.
Among the proximity switches, which one is more sensitive to strong magnetic field? The switch is either a Hall sensor, that is, a magnetic field sensor, or a reed switch proximity switch. Our company's throttle sensor is reed switch. Hall sensor is the most sensitive to magnetic field, and it is also useful to measure current by measuring current magnetic field with Hall sensor. For example, a new welding machine uses it to measure current.
What is a proximity switch? Principle and model of proximity switch Inductive proximity switch is a kind of sensor that uses eddy current to sense objects. It consists of a high-frequency oscillation circuit, an amplification circuit, a shaping circuit and an output circuit. Oscillator is an LC oscillating circuit, which consists of coils wound on a magnetic core. The oscillator generates a high-frequency alternating electromagnetic field in front of the sensor through the sensing surface. When the external metal object approaches this magnetic field and reaches the induction area, eddy current effect will be generated in the metal object, which will weaken or stop the oscillation of LC oscillation circuit. This oscillation change will be amplified by the post-circuit and converted into a certain switch output signal, thus achieving the purpose of non-contact detection.
The model is not necessarily, and each company has a different name. :wenku . Baidu ./view/02d 2 E6 c 358 f 5 f 6 1fb 7366639。
Search for "proximity switch" in Baidu Library, and you will find the answer you want.
Hello, when a metal object or a magnetic object moves to a certain range sensed by the switch, the proximity switch sends out a sensing signal to give an alarm or control.
The models of proximity switches are JHF23 14, JHF29 19, JHF3 106, etc.
The principle of proximity switch is that when the measured object approaches this switch, it will be turned on through signal reaction, thus turning on the controller and starting and stopping other devices of the controller. The models of magnetic proximity switches are jhf2314/jhf2919161. According to the required environmental requirements.
Proximity switch is recommended. What brand of proximity switch is good? Buy ten domestic brands of proximity switches, Jin Hefeng /RGP, Omron, Zheng Tai, Schneider and Delixi.