Limit switch commonly used three precautions

The travel switch is mainly used to convert the displacement of mechanical equipment into electronic signals, so that the working condition of the motor can be changed, so as to control the mechanical operation or used as program control. The play space in the sense of a travel switch is usually in the industrial category, where it interacts with other equipment to form more chaotic and active machinery. Lift equipment control system, can also use the travel limit switch control switch car door speed, active induction limit, car upper and lower limit maintenance.

Pay attention to the electrical code when using limit switches: The number of switches for communication and DC is very different. Please use limit switches within the rated range. In DC magnetic field, the controlling force is very low. That's because it has no zero. Once the arc occurs, it is difficult to subside, and the arc time is long. And the direction of the current is determined, so there will be contact transfer phenomenon, so that the contact will not break due to uneven.

Contact maintenance circuit: In order to better increase the service life of limit switch contacts, avoid noise, reduce carbon or sodium cyanide caused by arc, contact maintenance power circuit should be used. Then if the operation is wrong, it is likely to be penny wise and pound foolish. Use environment: Do not use the limit switch alone in the presence of flammable or combustible gas mixture. Because the switch heat caused arc, can cause fire or explosion. Switch is not moisture-proof structure, should be equipped with protective cover to prevent oil or water splash, splash or dust adhesion to direct liquid.