Elevator safety arrangement having safety spaces

A safety arrangement for implementing safety spaces in an elevator shaft, said safety arrangement comprising:

• a mechanical safety which can be moved to a working position to ensure a sufficient safety space in the elevator shaft, and
• an electric safety system comprising:
• at least one first detector for identifying the operating state of the mechanical safety device, and
• at least one second detector for identifying the position of a landing door,
• means for reading the at least one second detector;
• at least one third detector for identifying the position of an elevator car door, and
• means for reading the at least one third detector;
• an electric safety controller, which reads data from the detectors, and based on the data obtained, controls a mechanical stopping device which prevent movement of the elevator car in the elevator shaft;
• elevator control devices;
• a data interface bus between the electric safety controller and the elevator control devices
• wherein the safety arrangement comprises two separate sets of end limit markers for determining the position of the elevator car, a first set located closer to the ends of the elevator shaft determine the extreme limits of elevator car movement during normal operation while a second set located farther away from the ends of the elevator shaft than the first set determine the extreme limits of elevator car movement during maintenance operation, and
• readers of the end limit markers are fitted with the elevator car, said readers being connected to the electric safety controller via the data interface bus.