The button switch, also known as the control button (referred to as the button), is a low-voltage electrical appliance that is manually and generally reset automatically. Buttons are usually used to issue start or stop commands in circuits to control the on and off of electrical coil currents such as electromagnetic starters, contactors, and relays.
A push-button switch is an electrical appliance that is used to connect and disconnect small current circuits that is pressed to act and released to reset. It is generally used in control circuits with AC and DC voltages below 440V and currents less than 5A. Generally, it does not directly manipulate the main circuit, but can also be used in interconnecting circuits.
In actual use, in order to prevent misoperation, the buttons are usually marked with different marks or painted with different colors to distinguish them, and the colors include red, yellow, blue, white, black, green and so on. Generally red indicates operation in “stop” or “dangerous” conditions; green indicates “start” or “on”. The emergency stop button must be a red mushroom head button. The button must have a metal protective retaining ring, and the retaining ring should be higher than the button cap to prevent accidental touch of the button and cause misoperation. The material of the button plate and button box on which the button is installed must be metal and connected to the general ground bus of the machine.