Safety light curtains are safety devices that create a virtual barrier around a hazard. These devices meet the highest safety standards of Type4, SIL3, Category4, and PLe. Integration is efficient and easy with the minimal footprint, durable housing, and options for reduced wiring. The simplest function of a light curtain is when light beams are obstructed and the outputs turn off, which signals a stop to the associated hazardous movement(s). If no incident has occurred and the area is safe, a reset can be performed.
Safety Light Curtains. Safety light curtains are presence sensing safety devices that detect the presence of obstructions within the light curtain sensing field. These Active Optoelectronic Protective Devices (AOPD’s) are primarily used for machine guarding. Type 4 light curtains are characterized by repetitive, automated cross-checking for faults and errors. If a problem occurs, the Type 4 will notice it immediately and send a signal to the machine, sending it into lockdown mode.
Light Curtain sensors are specialized photoelectric devices that utilize two or more photoelectric beams. A safety curtain (or fire curtain in America) is a passive fire protection feature used in large proscenium theatres. It is usually a heavy fabric curtain located immediately behind the proscenium arch. The resolution or detection capability of a light curtain refers to the amount of separation between its laser beams. There are many different resolution options. For example, a 14mm resolution is appropriate for finger detection and is used when the curtain is placed very close to the source of hazardous motion.