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  Opposite safety light curtain means that the light emitting unit and the light receiving unit are respectively in the transmitter and receiver. The light from the transmitter is directed directly to the receiver to form a safety grating device that protects the light curtain. The safety light curtain is composed of controller, transmitter, receiver, transmitting line and receiving line.

  Reflective safety light curtain refers to the light emitting unit and light receiving unit are in the same sensor, the light emitted by the emitter is reflected back to the light receiving unit through the reflector, so as to form a safety grating device to protect the grating. A safety protective barrier is formed between the transmitter and the reflector. Whenever the safety screen is disturbed or the equipment is not working properly, the transmitter sends a signal to the press control system to prevent possible dangerous movement. Reflective safety light curtain is composed of controller, sensor, reflector and transmission line.