What is the purpose of a duplex system in elevator operation?

In elevator operation, the purpose of a duplex system is to manage two elevators using a single set of hall push buttons. This configuration allows for efficient use of space and resources in a building, especially in larger installations where multiple elevators can operate in tandem. By using a single set of buttons, passengers can call either elevator without needing to interact with separate control systems. This system simplifies the design of the elevator control mechanism and can reduce installation and maintenance costs while improving user experience by minimizing wait times and optimizing the flow of elevator usage.

With this setup, the dispatching system intelligently decides which elevator to send based on various factors, such as current location, load, and direction of travel, ensuring a smooth and efficient operation of the elevators within the building.