The sounder works with SELV – Safety Extra Low Voltage.
SELV < 25 V AC or < 60 V DC
These voltages do not pose a threat to animals or children.
If the nominal voltage is below 25 V for alternating current or below 60 V for direct
current, then there is no need for protection against direct contact with SELV.
The typical alarm system connections are designed for Safety Extra Low Voltage
(SELV).
The 12 V power supply of the ABUS alarm panels and other components also
operate in this voltage range.
For a security system, tamper-proof wiring/tamper monitoring of the wiring between
the components is also important and required.