| 摘要 |
PURPOSE:To reduce the cost by eliminating useless installation by providing a repeater exclusive for sensors and a repeater exclusive for district bells and transmitting data in time division multiplex system between controllers in a multiplex transmission control system such as automatic fire alarm system. CONSTITUTION:When any of fire sensors SRA-S3A, SRS-S3B connected to a transmission line L1 or L2 via repeaters TRRA-TS3A, TSRB-TS3B exclusive for sensors senses a fire and a corresponding repeater transmits a fire sensing signal to a receiving controller CR', the receiving controller CR' references an incorporated interlocking table, transmits a district bell driving signal to the repeaters TBBA-TB3A exclusive for the district bell so as to issue district bells BRA-B3A. The alarm is generated in a specific district even if the fire takes place anywhere without jumpering each repeater and useless installation is eliminated because of the repeaters distributed to exclusive devices, and the cost is reduced. |
