
VESDA
®
LaserSCANNER Product Manual
29
To facilitate the calculation of the backup battery size a Battery Calculation Sheet is presented on
the next page.
Table 6 - Calculating the size of backup battery
NORMAL LOADS @ 24 V DC
FULL ALARM LOADS @ 24 V DC
EQUIPMENT
LOAD mA
QTY
TOTAL
LOAD mA
QTY
TOTAL
Detector @ 3000rpm
240
290
Detector @ 3500rpm
280
330
Detector @ 4000rpm
350
400
Detector @ 4200rpm
400
500
Integral Display
60
80
Integral Programmer
20
(backlight off)
80
(backlight on)
Remote Display 7
relays (VRT-400)
90
110
Remote Display 12
relays (VRT-800)
110
240
Remote Programmer
(VRT-100)
50
(backlight off)
110
(backlight on)
Hand-held
Programmer (VHH-
1000)
50
(backlight off)
110
(backlight on)
Systems relay
Module (VRT-S07)
60
105
Remote termination
card - 7 relays
(VRT-500)
60
105
Other 24V loads
Total
mA
Total
mA
Standby Hours
Alarm Hours
Standby Capacity
Alarm Capacity
Total Capacity = Standby
+ Alarm
Divided by 1000 for
Standby Capacity
Multiply by battery factor
X1.25