How is a failure of the transmitter evaluated in a reflective light barrier system?

In a reflective light barrier system, the evaluation of a transmitter failure is typically classified as "object not present." This means that when the transmitter fails, the system misinterprets the signal, leading to the false assumption that an object is not present in the detection zone.

The functioning of a reflective light barrier relies on the emission of light that reflects off a target back to the sensor. When the transmitter is working correctly, the presence of an object interrupts the light beam, triggering the appropriate response. If the transmitter fails, it cannot emit or detect the light properly, resulting in a state where the expected signal (indicating an object's presence) is not received. Therefore, the system defaults to assuming that no object is present.

This misinterpretation highlights the importance of regular monitoring and maintenance of such systems to ensure that any failures are promptly addressed.