FIRECLASS Prescient III
5 Specifications & Detector Compatibility
Application, Installation & Commissioning Doc. version 2
31
5
Specifications & Detector Compatibility
5.1
Technical Specifications
The charger output is designed for charging Powersonic
Valve Regulated Sealed Lead-Acid batteries, which are
characterised by a reducing charge current when
charged from a constant potential source. It
will not
provide the maximum charging current when the other
power supply outputs are fully loaded. The panel
requires two 12 V batteries connected in series to pro-
duce 24 V.
The battery charger circuit is temperature compensated
and relies on a Thermistor mounted near the batteries
to ensure that the correct charging voltage is main-
tained. The Thermistor type has been chosen to fit the
profile of the Powersonic VRLA batteries. Use of batter-
ies by another manufacturer is
not
recommended.
Parameter
Value
Mains supply voltage
230 VAC [+10% -15%].
Mains supply frequency
50/60 Hz.
Power supply output
voltage
19.0 V - 28.3 V,
ripple 0.7 V maximum
Maximum power supply
output
5 A
Alarm current
(Mains failed):
160 mA
+ 20 mA to 50 mA for each
zone in alarm
+ Ancillary equipment cur-
rent
+ Alarm circuit current
+ Solenoid circuit current
Mains Failed current:
60 mA + Ancillary equip-
ment current
Integral charger output,
Quiescent
5 Amps, minus mains
failed current
Integral charger output,
Alarm
5 Amps, minus Alarm
current
Maximum Auxiliary
24 V DC supply:
1.0 A
Alarm circuit rating
3 A at 0.5 A each
(electronically fused)
Actuator circuit rating
2 at 1A each
(electronically fused)
Internal Battery size:
2 x 12 Ah Sealed lead acid
Enclosure Dimensions
(mm)
370 high x 325 wide x
125 deep
Weight
(excluding batteries)
4.85 kg
Cable Size Accepted by
Terminals
1.0 mm to 2.5 mm CSA.
(Cross Sectional Area)
Table 6: Technical Specification
Maximum Detectors per
Zone
32 - dependant on type &
EOL monitoring device
(not allowed on Manual
Release Zone)
Maximum Call Points
Per Zone:
No Limit (not allowed on
zones 1 & 2)
CAUTION: Battery Connection
Connecting only one 12 volt battery or
incorrect connection of the batteries will
permanently damage the panel and the
battery.
WARNING: Fuse Replacement
A fuse protects the internal power
supply; always replace this with the
correct type and rating:
T5AH250V
(20 mm fuse, 5 A, HBC, Anti-surge,
approved to BS EN 60127 or
equivalent).
Parameter
Value
Table 6: Technical Specification
