Common Method of Metal Button Switch-Knowledge Sharing of Yongli Switch Technology
The usage of metal button switch is getting higher and higher now. It can be imagined that the usage of machine tools and machines is a little more. Some button switches will make keycaps into different colors to distinguish them. Others will add LED lights to the circuit under the keycap and engrave them on the keycap. Draw pictures with different logos. A button switch with an LED is generally called a signal indicator. So we still have a need to know some common knowledge about button switch. Let Operon, the manufacturer of metal button switch, elaborate for you: when the button is pressed, two pairs of contacts act at the same time, often closed contacts are disconnected, often open contacts are closed. In order to mark the effect of each button and avoid misoperation, the button cap is usually made into different colors to show the difference. The colors are yellow, blue, white, red, green and black. Button switch can complete the basic control of start, stop, forward and reverse, speed change and interlock.
The main parameters, type, hole size, number of contacts and current capacity of the button switch are described in detail in the product imitation list. For example, red indicates stop button, green indicates start button, etc. Usually each button switch has two pairs of contacts. Each pair of contacts consists of a normally open contact and a normally closed contact. What are the usual ways to deal with the problem when the signal indicator lights are not turned on in the work?
In different electrical workplaces, because the circuit circuit control circuit is very long, this time will lead to the signal indicator light is not very bright, fundamentally there is induction voltage formation of this situation, when such a problem is presented, we use the simplest, most convenient and useful methods to summarize as follows.
1. The head and each indicator light use a shielding wire, which is not very beautiful. A kind of
2. Adding a RC circuit, many contactor coils are connected in parallel at both ends. The effect is to absorb the induction electromotive force. This is also a more reasonable treatment.
3. The input and output terminals of the circuit are merged into a small capacitance 0.01_0.22UF and then a 100K_500K resistor. Operations such as inconvenience. Chinese style
4. The best solution is to install a capacitance-blocking absorber. The advantages of this method are simplicity, convenience and low cost.