Detector addressing method for alarm detection circuit has detector addresses assigned beginning from one or other alarm centre terminal

摘要

The detector addressing method has the detectors (M) assigned addresses in turn beginning from one of the terminals (A,B) of the alarm line loop (2) connected to the alarm centre (1), each of the detectors supplying a response back to the alarm centre, When 2 detectors with the same address are identified from the detector responses, indicating a detector branch arm (3), the addresses for the detectors infront of the branch arem are retained and those for the detectors after the branch arm are erased, the remaining detectors assigned addresses beginning from the opposite alarm centre terminal.