Patent 7329854 was granted and assigned to Banner Engineering on February, 2008 by the United States Patent and Trademark Office.
A light screen safety curtain system including multiple light screens cascaded together to cooperatively protect an area or machine against unwanted intrusion. Such a system includes a plurality of independently operating light screens electrically connected to each other and to a control unit. When any one light screen detects an unwanted intrusion through a guarded opening, a stop or warning signal is generated by that light screen and is transmitted to the control unit. A method of configuring a light screen safety system without the need for an external programming device is provided.