Siemens DBS721 Technical Manual page 29

No. Tone Frequency pattern
Sweep from
11 Intermittent 970 Hz
12 Sweep-up 800
13 Sweep-up, 150 1000
continuous, 150 Hz
slow-whoop
31 Mute Alarm sounder is switched off so that the DBS728 can be operated as an optical
indicator.
Building Technologies
Fire Safety
Pulse pattern
to
0.5 s
0
0.5 s 1.5 s
970 Hz
970 Hz
800 Hz
1/7 s
1000 Hz
150 Hz
10 s
The sound level depends on the angle. See 'Annex technical data'
1
Acoustic and optical configuration
Adjustable max.
sound levels with
blanking plate (typ.
values in [dBA/1m]
at 12 V at 32 V
89
89
87
40 s
10 s
Planning
Standards
)
1
92 ISO 8201
US Temporal Tone LF,
EN 54-3
91 BS fire tone
90 DE industrial alarm
A6V10320094_m_en_--
2017-10-31
4
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