Fire alarm system

A fire alarm system provided with a fire receiver to which a plurality of fire sensors and controlled apparatuses, which is controlled in accordance with an issue of an alarm of said fire sensors, are connected,

• wherein said fire receiver comprises:
• an interface for connecting to other fire receivers by a LAN;
• storing means in which information on interlocking relation between said fire sensors and said controlled apparatuses as well as interlocking relation between said fire sensors and controlled apparatuses of other fire receivers is stored;
• means for, when said fire sensors issue an alarm, outputting activation information of controlled apparatuses to be interlocked, and transmitting activation information to the controlled apparatuses of the other fire receivers over said LAN at the same time based on the information stored in said storing means;
• and
• means for activating controlled apparatuses designated by the activation information upon receiving the activation information transmitted from the other fire receivers via said LAN.

A fire alarm system provided with a fire receiver to which a plurality of fire sensors and controlled apparatuses, which is controlled in accordance with an issue of an alarm of said fire sensors, are connected,

• wherein said fire receiver comprises:
• an interface for connecting to other fire receivers by a LAN;
• storing means in which zone information set for each of said fire sensors and said controlled apparatuses and common zone information to controlled apparatuses of the other fire receivers are stored;
• means for, when said fire sensors issue an alarm, outputting activation information of controlled apparatuses to be interlocked in an identical zone, and transmitting the common zone information over said LAN at the same time based on the zone information stored in said storing means;
• and
• means for activating controlled apparatuses of an identical common zone based on the zone information stored in said storing means upon receiving the common zone information transmitted from the other fire receivers via said LAN.

A fire alarm system provided with a fire receiver to which a plurality of fire sensors and controlled apparatuses, which is controlled in accordance with an issue of an alarm of said fire sensor, are connected,

• wherein said fire receiver comprises:
• an interface for connecting to other fire receivers by a LAN;
• and
• means for, when said fire receiver receives a signal from other fire receiver and transmits a response signal indicating to the effect that it is a response to the signal via said LAN, and upon receiving a signal from yet other fire receiver via said LAN before transmitting said response signal to said other fire receiver, generating a response signal that can commonly respond to these fire receivers and transmitting the response signal via said LAN.

A fire alarm system provided with a fire receiver to which a plurality of fire sensors and controlled apparatuses, which is controlled in accordance with an issue of an alarm of said fire sensor, are connected,

• wherein, upon being connected to a signal line from said fire receiver and receiving an activation signal from said fire receiver, said controlled apparatuses are activated by a repeater for supplying a power to said controlled apparatuses via a control line;
• wherein said repeater comprises:
• transmitting means that is connected to said signal line and transmits and receives data to and from said fire receiver;
• a relay having a relay contact for supplying a power to said controlled apparatuses via said control line when said relay is operating;
• a disconnection monitoring means for monitoring disconnection of said control line to detect a disconnected state at the time of disconnection of said control line when said relay is not operating, and detect a disconnected state when said relay is operating as well at the same time;
• and
• controlling means that is connected to said transmitting means, said relay and said disconnection monitoring means and controls operations of said repeater, and
• wherein said controlling means receives a fire signal from said fire receiver via said transmitting means and causes said relay to operate, and then confirms operation of said relay contact based on a detection signal of a disconnected state from said disconnection monitoring means.

A fire alarm system provided with a fire receiver to which a plurality of fire sensors and controlled apparatuses, which is controlled in accordance with an issue of an alarm of said fire sensor, are connected,

• wherein, upon being connected to a signal line from said fire receiver and receiving an activation signal from said fire receiver, said controlled apparatuses are activated by a repeater for supplying a power to said controlled apparatuses via a control line;
• wherein said repeater comprises;
• transmitting means that is connected to said signal line and transmits and receives data to and from said fire receiver;
• a relay having a relay contact for supplying a power to said controlled apparatuses via said control line when said relay is operating;
• and
• controlling means that is connected to said transmitting means and said relay and controls operations of said repeater;
• and
• wherein said controlling means receives a fire signal from said fire receiver via said transmitting means and, when causes said relay to operate, causing said relay to operate at a timing when there is no transmission signal in said signal line.