The primary purpose of a security device is the detection of a body. Usually connected through to an alarm system the primary purpose is for perimeter protection. The emphasis is on reliability with a security device, where as a safety device must be absolutely fail safe.
DSE - IR Security Curtain Sensors
DSE are security devices for protecting perimeters such as patio doors or shopfronts. Two or more beams must be broken to trigger an alarm. A jumper link selects one of two frequencies to allow two sets to be used near each other
DSA - IR Safety Curtain Sensors
DSA are dual purpose, for security or for safety, selected by jumper. Beams are parallel and crossing to create a multi beam matrix. Only one beam needs to be broken to switch the output.
