Limit switch is to limit the motion limit position of mechanical equipment electrical switch, generally can be divided into two kinds of safety limit switch and ordinary limit switch, The ordinary limit switch is the general limit switch, compared with the safety limit switch, the main difference is:
1, the safety limit switch has a direct open circuit action device (forced disconnect contact), which means that even if the contact bonding occurs, because the switch structure can forcibly disconnect the bonding section, the dangerous section (load) can always be stopped, and the device will operate at the safe end.
2, the ordinary limit switch does not have this structure, so if the contact bonding will continue to supply power, the dangerous section (load) naturally can not stop, the device will continue to operate in the dangerous section.
For the places with high safety requirements, priority should be given to the safety limit switch.
