Hoistway door locks are always a configuration of what type?

Hoistway door locks are typically configured in a series arrangement. This design ensures that all locks must be engaged for the system to allow the elevator operation, enhancing safety and preventing unauthorized access to the hoistway. When locks are in series, if one lock is not properly engaged, the circuit is incomplete, and the elevator cannot operate. This configuration is crucial because it ensures that all doors are secured before the elevator can move, providing a safeguard against accidents.

In contrast, options such as independent configurations would not provide the necessary interlocking function to ensure that all doors are closed and secure before the elevator operates. Automatic configurations refer to locks that engage automatically with the elevator controls, but they do not imply a specific structural arrangement like series or parallel. Parallel arrangements could potentially allow for multiple paths, which would not provide the required security and operational safety for elevator systems.