The working principle of the safety light curtain is mainly by emitting a modulated infrared beam and receiving it to form a light curtain protection area. When an object enters the protective light curtain, the beam is blocked by the object and received by the internal control circuit. The equipment circuit will respond immediately and the output signal will be used for emergency stop or safety alarm of the mechanical equipment.

According to the above principles, when an object is blocked, the safety light curtain will output a signal to achieve the final control and protection effect. The output modes of the safety light curtain are: NPN/PNP output (high level/low level); relay output with controller.

Which output method to use can be determined according to the actual protection requirements of machines and equipment, and the safety light curtain manufacturer will also provide professional technical guidance and product suggestions according to the customer's application scenarios.