In the case of electronic bells (high impedance devices), the device must be powered directly from
the secondary of the bell’s transformer
(Fig. 7)
.
As an alternative, the system can be powered using the voltage with the above characteristics.
NOTE:
the system does not work if there is no power but it maintains the state it had before power
cut and it restores it when the power returns.
AF3901R OUTDOOR SELF-POWERED RADIO SIREN
(Fig. 8)
Technical features
• Power: supplied only by 7,2V-13Ah lithium battery (supplied
with the equipment). No wire connection is required.
• Current demand when quiescent: 100 µA max @ +7,2V
• Current demand under alarm: 2 A max @ 7,2 V
• Blinker: Xenon lamp with a luminous intensity equal to > 2000 cd
• Operation: 3 years for an average of 20 alarms / per year and
1 conn 1 disconnection a day, before replacing the bat-
teries.
• Acoustic signals: with an increasing sound frequency 1400 to
1600 Hz for 1 second and a decreasing sound frequency 1600 to 1400 Hz for 0.5 seconds.
• Loudspeaker: magnetic-dynamic type.
• Acoustic radiation pressure at 1 meter: 115 dB
• Transmitter maximum power: 10mW
• Carrier frequency: 433.92 MHZ
• Signal coding: 36 BIT random code, previously programmed
• Rated range of the connection: 30 meters inside the house under normal conditions (metal walls
and anti-seismic structures can reduce its range)
• Protection against the enclosure opening
• Protection against removal
• protection against reversal of battery by means of a polarised connector
• Guard and bottom in polycarbonate
- 37 -
G
246
332
Fig. 7
electronica bell
C.369 31-05-2002 16:55 Pagina 37
