Patent ID: 7324014

Claim:
A system for eliminating cross talk between loop detectors in a security system, said system comprising: a) at least two inductive loops positioned adjacent to a movable barrier to detect the presence of objects adjacent to the barrier; b) each of said at least two inductive Loops being connected to a separate loop detector circuit to thereby form at least two loop detectors; c) a device for automatically selecting a unique frequency each of said at least two loop detectors will function at so each of said two loop detectors will be functioning at a different frequency to thereby avoid cross talk between each of said at least two loop detectors; and wherein each loop detector is housed in a modular casing and said modular casing plugs into a loop detector modular unit receiving slot, at least two of said slots being positioned in an operative integrated fashion on a security system controller board, and wherein said device to select said unique frequency at which each of said at least two loop detectors will function comprises circuitry connected to each receiving slot that each of said at least two loop detectors will be connected to that automatically sets a unique and different frequency at which each of said at least two loop detectors will function.