Abstract: The invention concerns a method of controlling a hazard alert system with a control device and multiple release mechanisms connected to the control device, wherein the release mechanisms are each connected to at least one alarm device. The initialisation step consists of identification data being assigned to the release mechanisms, and then a control signal is transmitted by the control device to activate or deactivate the alarm devices to all the release mechanisms, wherein the control signal transmits identification data from one or more release mechanisms, and the identification data transmitted by the control device is compared, by the release mechanisms, to the identification data assigned to them. If the release mechanisms determine that the identification data compared with one another matches, they send a control signal to activate or deactivate the alarm devices connected with them, so that the alarm devices are activated or deactivated synchronously.

Abstract: A method for the detection and signaling of smoke by means of an optical assembly in a detector casing, the optical assembly including at least one optical transmitter element and at least one optical receiver element, and which emits a reception signal which is representative of the incident amount of light. An electronic evaluation device compares the reception signal to a setpoint and an alarm signal is generated when the reception signal reaches the predetermined threshold value. The temperature is measured on or in the detector casing and the temporal characteristic of the temperature is correlated with the temporal characteristic of the reception signal of the optical receiver element and a dew film signal is generated when the rise in the reception signal is correlated to a rise in temperature.

Abstract: A process for automatically assigning detector addresses in a danger detection system, comprising a master station and at least one two-wire detection line linked thereto to which a multiplicity of detectors are connected wherein each detector has a capacitor for power accumulation, a measuring resistor in one wire, an evaluation device evaluating the voltage drop on the measuring resistor to which an address latch is connected, and a switch controllable by the evaluation device between the wires.

Abstract: A fire alarm system may comprise a control center, a wired communication pathway connected to the control center, and a relay station having a receiver and a signal evaluation circuit connected to the communication pathway. First decentralized alarm boxes may be wired to the communication pathway, and second decentralized alarm boxes may communicate with the receiver of the relay station via a wireless channel, wherein the first and second alarm boxes, in case of fire, produce an alarm signal which is transmitted to the control center via the communication pathway. A set of separate coupling modules may be disposed in the relay station and may be disconnectably connected to the signal evaluation circuit and the communication pathway via appropriate connecting elements, the coupling modules being designed for different communication modes.

Abstract: A process to determine malfunctioning detectors in a danger signaling system having a control center and at least two-wire signaling line joined to multiplicity of detectors.

Abstract: A danger signalling system, including a multiplicity of detectors (M1 to Mn) and other line members, in case of need, which respond to at least one danger criterion and are connected to a two-wire line (line A), a control centre connected to the line (line A), which has a voltage supply and a central processor in which the addresses of the detectors are stored for individually addressing and polling the detectors as well as a program for monitoring the status of the detectors. A testing circuitry is disposed in the control centre for checking the working order of the network formed from the line and the detectors or line members by means of a testing unit wherein the testing circuitry includes a testing processor which, in turn, has an evaluation software, and a switch assembly controlled by the testing processor is provided for selectively connecting the at least one testing unit to the line (line A).