| 摘要 |
PROBLEM TO BE SOLVED: To provide a multisignal type fire sensor which easily conducts test signal processing in case that its control part is provided only with one microcomputer. SOLUTION: A P-type system multisignal fire sensor with an automatic testing function is connected to a fire receiver via a first and second lines. In this case, the fire sensor is provided with; a first transmission circuit which transmits a fire signal to the fire receiver by setting a low impedance to the first line when a fire breaks out; a second transmission circuit which transmits the result of a prescribed function test made to the fire sensor, by means of transmission signals, to the fire receiver via the second line; and an abnormal-signal transmission means which transmits abnormal signals indicating an abnormal state to the fire receiver via the first line when at least either the first or second transmission circuits is in an abnormal state. COPYRIGHT: (C)2007,JPO&INPIT
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