Light curtains are specialized photoelectric devices that use two or more photoelectric beams. These sensors either use opposing beams (separate transmitter and receiver units) or reflectors (a single transmitter unit and a reflector). Today, light curtains are used worldwide to ensure the safety of factory personnel. These devices serve as safety barriers, creating a virtual shield around potential hazards. They meet the highest safety standards, including Type 4, SIL3, Category 4, and PLe.
Light curtains are used in systems requiring high safety conditions to protect human limbs or for purposes such as product counting and detection. They consist of two modules: RX and TX. When an object enters between these modules, the sensor barrier transmits information to the system in milliseconds, depending on the output type model.
How Do Light Curtains Work?
A light curtain consists of two modules: a transmitter and a receiver. When an object or light interrupts the path between these two modules, the sensor barrier is activated. Subsequently, information is sent to the system within milliseconds. The active sensor connection comprises two parts: electrical and mechanical.
The electrical connection uses color coding, while the mechanical connection is made through brackets and screws. To simplify the working principle of a light curtain: if the sensor is disrupted, all electrical operations in the affected area are automatically halted. To resume operation, the cause of the sensor disruption must be eliminated.
Applications of Light Curtains
Light curtains provide a highly advantageous safety mechanism against potential injuries and workplace accidents. Therefore, they are widely used in almost every production area imaginable. Examples include cutting and pressing machines, where light curtain systems are extensively applied. This precaution helps prevent unintended human interventions and the negative consequences that may arise from them.
Light curtains are also in high demand in companies that use robots or handle transportation. This mechanism prevents incorrect, incomplete, or excessive stacking of packages. The light curtain system also allows for the restriction of robot working areas.
The Importance of Light Curtain Usage
In areas where light curtains are used, both personal and material safety can be significantly ensured. Thus, the use of light curtain systems is of utmost importance. The significance of light curtains is especially notable in terms of occupational health and safety.
How Do Light Curtains Ensure Worker Safety?
A light curtain is a device equipped with light-detecting photo cells. These curtains are positioned opposite each other, creating an area invisible to the human eye. Any foreign factor entering this area immediately causes a physical change detected by the device. The curtains then issue a warning signal in response to this change. These warning signals help ensure workplace and worker safety.