Visual Alarm Device (VAD)
Technical Handbook, AutroGuard Multicriteria Protector Series V-430, V-530, V-100, V110 and V-120,
AutroGuard-Technical-Handbook, Doc-1004339, Revision 1, 2020-06-29,
Autronica Fire and Security
Page 38
6.4 Category O
Category O (Open Category) is Autronica’s specified coverage volume
for 2,5m mounting heights.
Category O has lower power consumption than category C (refer to
table in Technical Specifications, chapter 4.5). The maximum number
of VADs depends on the total load on the loop. Selecting Category O
enables you to have a larger number of VADs on the loop as an
alternative to fewer VADs with higher power consumption.
6.5 Visual Alarm Device (VAD) Intensity
6.5.1 Consideration Factors for VAD Sensitivity Settings
Visual Alarm Devices (VAD) must be installed and configured
according to national regulations and installation standards.
In addition to the Coverage Volume of a VAD, representing the
minimum level of light likely to attract attention, the VAD intensity
settings (high, medium, low or open) should be selected based on the
following factors:
the size of the area
the existing ambient light conditions (actual light sources, natural
light, etc.)
power consumption (must be calculated and considered for the
selected intensity)
6.5.2 VAD Intensity Settings
The AutroGuard® protector’s integrated VAD can be configured to
have different intensities (providing different Coverage
Volumes/EN54-23) in order to meet the required illumination of 0,4
lux at the premises. VAD Intensity refers to Coverage Volume in
EN54-23.
The AutroGuard® protector’s VAD emits a white or red light, and the
following VAD intensities can be configured:
High
Medium (white VAD only)
Low
Open
For further details, refer to Consideration Factors for VAD Sensitivity
Settings, chapter 6.5.1 and Configuration, chapter 10.6.7.
