Today button posts It can be found on a vast number of industrial enterprises. Such devices are characterized by the lifting mechanisms, working machine tools, loading, unloading equipment etc.. The very post is embedded in the switching circuit. Since it is possible to carry out via a pressing both switch, and off electric receiver. A classic example - the engine of the machine, which is in any plant.
In the post, there are two buttons, the color of which varies dramatically. Buttons are connected to the circuit, as easy to guess, on and off. The black button is responsible for the inclusion of, red for the shutdown, eg, the same machine motor.
Technically, it is not so difficult to find, as it may seem. Black button acts as a pusher contact closure circuit. Red button and the pusher, but break contact.
Conspicuous large body push-button station. And he is such a reason. There GOST, which requires for the production of the body use only carbolite. While it may seem outwardly, that ordinary plastic housing.
As a result, post can close and open the circuit of the electric switch.