Classroom on demand

Welcome to Classroom on demand, your source for educational materials related to the vertical transportation industry. This site represents the knowledge and expertise of the best engineers and mechanics in the elevator industry, and will help those new to the elevator industry learn about the basic workings of elevator systems, and also will serve as a reference for people with more experience.

Door Protection Module

Door Protection Module: This module contains assemblies that keep the doors from attempting to close on passengers when they enter or leave the elevator. The three major assemblies within this module are as follows:
• Power supply: sends power to the transmitter and receiver. The power supply is usually mounted on the top of the car.
• Transmitter: transmits infrared "beams" across the door opening. Any obstruction within the door opening will break this beam.
• Receiver: receives the infrared "beams" from the transmitter.
These assemblies are located on the car.

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