What is the primary function of an elevator's limit switch?

The primary function of an elevator's limit switch is to stop the elevator at the correct floor. Limit switches are essential safety devices that help to ensure that the elevator comes to a complete stop at the designated landing points, such as the floors of a building. These switches detect when the elevator has reached its intended position and then send a signal to the control system to halt the elevator's movement.

This is critical for passenger safety, as it ensures that the elevator aligns properly with the landing so that people can enter and exit safely. Misalignment could lead to dangerous situations, such as tripping or falling.

While the other functions listed, such as controlling speed, activating emergency brakes, and monitoring weight capacity, are important aspects of elevator operation and safety systems, they are not the primary role of the limit switch, which specifically focuses on ensuring proper stopping at each floor.