Battery Backup Calculations - VESDA LaserSCANNER VLS-200 Installation Manual

VESDA ®

5. Battery Backup Calculations

The nominal supply voltage is 24 VDC. Use Table 2 to calculate and to determine the battery
backup requirements for your VESDA system. Refer to Table 1, page 3 for power consumption
details.
EQUIPMENT
LaserSCANNER
(No display &
programmer)
Display Module
Programmer Module
Remote Display
Other 24V loads
STANDBY CAPACITY
(mAHr)
Table 2 Calculations to Determine the Battery Backup Requirements
Version 1.3
NORMAL LOAD @ 24 V DC
LOAD QTY
(mA)
TOTAL (mA)
STANDBY HOURS
LaserSCANNER Installation Manual
FULL ALARM LOAD @ 24 VDC
TOTAL LOAD
(ma) (mA)
TOTAL (mA)
X
ALARM HOURS
=
ALARM CAPACITY
(mAHr)
TOTAL CAPACITY =
STANDBY + ALARM
(mAHr)
DIVIDE BY 1000
MULTIPLY BY BATTERY
FACTOR 1.25
QTY TOTAL
(ma)
X
X 1.06
AHr
7