100 mm

IntroductionThe meaning of different tonesPfannenberg sounders can generate up to 45 different tones. All tones can selected individually and must beadapted to suit the respective environmental conditions. Therefore, some of the pre-installed tones have apre-defi ned meaning.Standard1200 HzDIN 33404Acoustic alarm signal for workplaces in cases offi re, gas, explosion or radiation danger500 Hz≈➤1s➤ISO 8201Emergency evacuation signal950 Hz➤1s➤➤1,5s➤≈1200 HzNFS 32-001Fire alarm in France500 Hz≈➤1s➤SS 031711Emergency signal in Sweden700 Hz➤➤0,25 sduration Dauer 60 60 s s≈A large number of audio samples of different tones are available at www.pfannenberg.com/service.Monitoring: standby currentThere are two ways of monitoring the standby current electronically using a terminal resistor in order to monitoracoustic signaling devices:• measurement of the current below the lower nominal voltage limit of the device, or• measurement of the standby current by reversing the supply voltage polesInrush current limitationAcoustic alarm devices can draw a strongly increased initial current for a very short period of time. This is causedby the circuit-related input capacity. For special requirements, acoustic alarm devices are available with an initialcurrent limiter.30