A fire detector is connected to a loop transmission path connected to a receiver. When the loop transmission path is normal, a communication connection is made from a transmitting unit to the fire detector to monitor fire. When a break fault occurs in the loop transmission path, a break monitoring control unit turns switching circuit units ON to connect a termination of the loop transmission path to the transmitting unit. To the loop transmission path, a relay detects a current normal direction at normal and a current reverse direction at the time of occurrence of a break for transmission to the receiver. When a break occurs in the loop transmission path, a break section determining unit of the receiver determines, as a break section, a section in which the current normal direction detected by a plurality of the relays is changed to the current reverse direction.

A fire detector is connected to a loop transmission line connected to a receiver. When the loop transmission line is normal, a transmission unit is connected to the fire detector. When a disconnection failure occurs, a disconnection monitoring unit turns on switching circuits to connect the end of the loop transmission line to the transmission unit, and the receiver connects to the fire detector from both ends of the loop transmission line. An input/output switching booster is inserted and connected in the middle of the loop transmission line, and when the start side transmission line is disconnected and the switching circuits are turned on, the input/output is switched. Accordingly, the input/output switching booster amplifies the down signal input from the terminal side transmission line and outputs it to the start side transmission line and at the same time amplifies the up signal input from the start side transmission line.

There is provided an alarm system and method for managing current of a notification appliance circuit. The system comprises a notification appliance circuit, in which a control panel and notification appliances are coupled to the notification appliance circuit. The control panel provides an activation signal in response to an emergency condition. The notification appliances are configured with time delays and receive an activation signal from the control panel. The notification appliances discharges energy storage components based on at least the activation signal and recharges the energy storage components at different time intervals based on the time delays in response to discharging the energy storage components.

There is provided an alarm system and method for managing current of a notification appliance circuit. The system comprises a notification appliance circuit, in which a control panel and notification appliances are coupled to the notification appliance circuit. The control panel provides an activation signal in response to an emergency condition. The notification appliances are configured with time delays and receive an activation signal from the control panel. The notification appliances discharges energy storage components based on at least the activation signal and recharges the energy storage components at different time intervals based on the time delays in response to discharging the energy storage components.

Devices, systems, and methods for an alarming system for multi-unit buildings are described herein. One system includes a number of remote sensors positioned in a building having common areas and individual units occupied by occupants, the remote sensors are provided for sensing an alarm condition, a central control panel located in the common areas of the building for collecting data from the remote sensors, the control panel utilized for analyzing the collected data, determining whether to initiate an alarm, and sending one or more signals to initiate an alarm, if an alarm is to be initiated, and an occupant input device located in at least one individual unit for requesting a delay in initiating the alarm.

The invention relates to a method for assisting with the commissioning and/or maintenance of a fire alarm and/or extinguishing control center (12) comprising a central control unit (30), a plurality of functional modules (14a-14g) and at least one data interface (36). A display unit (40) is connected to the central control unit (30) by means of the data interface (36), and an information mode which can be activated and deactivated is respectively assigned to each of the functional modules (14a-14g). Information is respectively stored for each of the functional modules (14a-14g), wherein, by activating the information mode of a functional module (14a-14g), the stored information relating to that functional module (14a-14g) whose information mode has been activated is displayed using the display unit (40) or tablet computer (44). The invention also relates to a system for carrying out the method and to a functional module.

A fire detector is connected to a loop transmission path connected to a receiver. When the loop transmission path is normal, a communication connection is made from a transmitting unit to the fire detector to monitor fire. When a break fault occurs in the loop transmission path, a break monitoring control unit turns switching circuit units ON to connect a termination of the loop transmission path to the transmitting unit. To the loop transmission path, a relay detects a current normal direction at normal and a current reverse direction at the time of occurrence of a break for transmission to the receiver. When a break occurs in the loop transmission path, a break section determining unit of the receiver determines, as a break section, a section in which the current normal direction detected by a plurality of the relays is changed to the current reverse direction.

The invention relates to a method for assisting with the commissioning and/or maintenance of a fire alarm and/or extinguishing control center (12) comprising a central control unit (30), a plurality of functional modules (14a-14g) and at least one data interface (36). A display unit (40) is connected to the central control unit (30) by means of the data interface (36), and an information mode which can be activated and deactivated is respectively assigned to each of the functional modules (14a-14g). Information is respectively stored for each of the functional modules (14a-14g), wherein, by activating the information mode of a functional module (14a-14g), the stored information relating to that functional module (14a-14g) whose information mode has been activated is displayed using the display unit (40) or tablet computer (44). The invention also relates to a system for carrying out the method and to a functional module.

The present disclosure is directed to methods and systems for providing information about a target based on pulse widths. The information can be provided in a formatted output signal which uses a pulse width protocol to code information by varying amplitudes and widths of successive pulses in an output signal pulse train portion. The method includes detecting a first feature of the target and in response to detecting the first feature, generating an output signal pulse train portion comprising two or more pulses with at least two of the pulses having different amplitudes and each of the two or more pulses having a width corresponding to a logic value. The widths of the two or more pulses in the output signal pulse train portion can be measured in response to the detected first feature reaching a first amplitude threshold, whereby the widths can correspond to different logic values.

In one aspect, an integrated circuit (IC) includes a sensor. The sensor includes a processor configured to provide speed and/or direction of a target object based on the speed of the target object; monitor for a diagnostic fault; provide information if the diagnostic fault is detected; monitor for critical faults; and provide information if a critical fault is detected and the sensor recovers from the critical fault.