How does a Diffuse Photoelectric Sensor Work with Relay?

Photoelectric sensor is a switch based on the photoelectric effect, which produces a photoelectric effect after being irradiated by visible light and converts the light signal into an electrical signal for output. It converts luminous flux into electricity. In addition to measuring light intensity, it can also measure various physical quantities such as size, displacement, speed, temperature, etc. by light transmission, occlusion, reflection and interference, so it is an important sensitive device with a wide range of applications. There is no direct contact with the measured object during photoelectric measurement, and the quality of the beam is approximately zero. There is no friction in the measurement and almost no pressure is applied to the measured object. Now we will show that a photoelectric sensor works with a relay.

This is an ATO diffuse reflective photoelectric sensor.

Connect its power supply (BN=24V +, BU = 0V), and use an intermediate relay as its load.

When an object passes through the light source, the reflected light is detected by the sensor.
The sensor output is triggered and the KA1 relay coil is engaged.

We adjusted the relay to a self-locking type.
When the sensor is triggered once, the relay locks itself and the output light of the sensor is always on.

If you want to know more details about How to wire and test diffuse photoelectric sensor, please view the video below. In addition, ATO online store offers through beam photoelectric sensor, diffuse reflective photoelectric sensor, retro-reflective photoelectric sensor and slot type photoelectric sensor for you. The sensor acts when an object blocks or reflects infrared light.