What does the interruption of the light beam by an object cause in a reflective light barrier?

When an object interrupts the light beam in a reflective light barrier, it creates a change in the conditions that the sensor monitors. This interruption is detected by the sensor, which is designed to respond to the presence or absence of the light beam. As a result of the light beam being blocked, the sensor activates its output, effectively switching it from one state to another, such as from off to on or vice versa, depending on its configuration.

This mechanism is fundamental to the operation of reflective light barriers, which are commonly used in various applications such as automation and safety systems. By switching the output, the sensor can communicate that an object is present or that a certain condition has been met, allowing for appropriate actions to be taken in response to the detected change.