REPEATER FOR FIRE ALARM SYSTEM USING MULTIPLE TRANSMISSION AND FIRE ALARM SYSTEM PROVIDED WITH THE REPEATER

摘要

PROBLEM TO BE SOLVED: To allow a signal processing part small in the number of control ports to sufficiently deal with the increment of the number of sensor lines to be connected by respectively connecting a fire test control port and a fire test/restoration selection control port in the signal processing part to an interlocking switch and a common switch and selectively executing a fire test and fire restoration. SOLUTION: The interlocking switch is held at a normally opened state and driven by a control signal outputted from the fire test control port PA of the signal processing part 10. The common switch also is held at a normally opened state and driven by a control signal outputted from the fire test/restoration selective control port PB of the signal processing part 10. In the signal processing part 10, only 'the number of sensor lines plus one port' is sufficient for the number of control ports for controlling the interlocking switch and the common switch, so that even when the scale of the system is increased and the number of sensor lines to be connected is increased, the signal processing part having the small number of control ports can sufficiently correspond to these increment.