Optical digital device used in closed loop systems for speed feedback. Typical resolution is 1024 pulses per motor revolution.

Alternating Current Variable Voltage Variable Frequency - type of motor control used in most modern elevators.

An electrically operated safety device attached to the machine that acts to stop and hold the elevator.

Oil or spring buffer used as a safety device in case of over travel of the car or counterweight.

Elevator interior cabin, sometimes also referred to as the car.

The enclosure that is used by passengers to travel up or down.

The applied panel, usually stainless steel, containing the car push buttons inside the elevator cab.

The speed of a motor is regulated by using the feedback from an encoder or tachometer.

The device that mechanically couples the car door to the hall door, making it possible for the hall door to open.

The main cabinet containing the electrical equipment necessary to control the elevator motion.