Patent ID: 6838999

Claim:
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, including the following process steps: In a first phase, a voltage is applied to the line from the master station and the capacitors are charged, in a second phase, the master station emits a switch signal to close the switches of all detectors on the detection line, in a third phase, two constant currents having different levels are impressed on the detection line at a predetermined alternation and are transformed by means of a pulse receiver in the detector into a digital signal constituting a data word which is stored in the address latch, and a logic circuit blocks another information from being rolled into the address latch and opens the switch, and the third phase is repeated with another data word for each detector ready for reception the address latch of which is not occupied.