The invention relates to a condition monitoring unit for a fire detection and/or extinguishing control unit. The condition monitoring unit comprises at least one current circuit connection for connecting the condition monitoring unit to at least one current circuit, wherein the current circuit has at least one participant which detects an event. The condition monitoring unit further comprises a measuring device for measuring values of currents and/or voltages at the current circuit connection and an analysis unit in which one or more threshold values can be stored. The analysis unit is designed to detect, in an operating mode at least, an event in which values of currents and/or voltages measured by the measuring device exceed or fall below the at least threshold value. The condition monitoring unit further comprises a memory unit or an interface for transmitting data to an external memory unit, wherein the condition monitoring unit is designed to store values of the currents and/or voltages measured by the measuring device in the memory unit, in a learning mode at least, or to output the values via the interface to the external memory unit and to determine or change the threshold values depending on the stored values of the currents and/or voltages.
The invention also relates to a method for determining threshold values for a condition monitoring unit for a fire detection and/or extinguishing control unit, to a fire detection and/or extinguishing control unit and to a fire detection system.