elevator leveling sensor switch ThyssenKrupp SIMIDER SXSA21-D3ZNK elevator Door area magnetic switch parts

The elevator has multiple light level sensors for safety protection, to ensure that when one of the light level sensors fails, the other light level sensors can ensure the normal operation of the elevator. The light level sensor converts the displacement of the car into a light signal, which is transmitted to the guide rail through a light emitting diode (specially made). The receiving diode and the detection circuit detect the intensity of the light reflected from the guide rail in real time. When the sensor contacts the light isolation plate, the intensity of the reflected light decreases.

The level of the sensor output will change from high to low. The control cabinet determines whether the car is leveled and the floor it is on (there seems to be a dip switch) by measuring the changes in the signal level in real time, and then completes the entire leveling process in combination with the reference point of the rotary encoder.

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