Looking at the conventional fire detection facilities for fire detection, the input of the DC24V is supplied to the distribution panel, and the distribution panel is configured by connecting the alarm bells for the fire detection facilities, which are installed in a specific area, by floor. These alarms consist of a set of transmitters and lamps, etc., so that a fire is detected in a specific area by detecting a fire in the installed area and notifying the fire receiver to inform the fire occurrence through all alarms connected to the distribution panel. It is configured to. However, in the case of a seedling configured on the same layer as described above, a continuous connection configuration to the distribution panel is made, and as a fuse is positioned between the supplied power and the distribution panel, when a problem such as short circuit occurs in one of the alarm types, As the abnormal current flows into the fuse, there is a problem in that all the alarm bells connected to the distribution panel cannot function. In order to solve this problem, a method of providing a fuse for each floor or each type of seedling was also sought, but this only resulted in a problem due to a complicated structure and an increase in installation cost. On the other hand, the present invention relates to a seedling for a fire-fighting facility capable of self-blocking due to an occurrence of an abnormality, and an alarm having an abnormality such as a short circuit cuts off the connection with the outside, thereby signaling signals between the alarms except for the alarm having an abnormality. By sharing, the rest of the seedlings operate normally, and the alarms that have been self-blocking output a signal informing the fire receiver to determine the occurrence of an abnormality.
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