Xtralis VESDA VLC User Manual

VESDA by Xtralis VESDA VLC Product Guide
www.xtralis.com 31
9 Battery Backup
The power supply for the VLC detector may be switched to a back up battery in the event of the
supply being disrupted. The size of the battery back up is determined by local standards and codes,
the total power required by the system, back up time required, allowance for reduction in capacity
with age and expected temperature variations.
Note: It is recommended that batteries be changed as per the battery manufacturer’s specifications or
as per your local codes and standards.
9.1 Backup battery size calculation sheet
Normal Load @ 24 VDC Full alarm load @ 24 VDC
Equipment Load mA Number Total Load mA Number Total
Detector 225 245
Remote Display 90 110
Remote Programmer 50
(backlight
off)
110
(backlight
on)
Hand-held Programmer 50
(backlight
off)
110
(backlight
on)
Other 24 V loads
Total mA Total mA
X X
Standby hours Alarm hours
=
Standby capacity Alarm capacity
Total capacity = Standby + Alarm capacity
Divided by 1000 for standby capacity
Multiplied by battery factor (Normally 1.25)
Table 9-1: Calculating the size of backup battery

Xtralis VESDA VLC Specifications

General

Brand	Xtralis
Model	VESDA VLC
Category	Smoke Alarm
Language	English