Power Supply - Bosch FCS‑320‑TM Series Operation Manual

50 en | Planning
a
Ducts with small and large duct cross-sections
4.10

Power Supply

To measure the power supply, the detector-ready state of the security system and the alarm
case are regarded. When the system is ready to detect, the power supply must provide the
standby current for the aspirating smoke detectors and ensure the emergency power
rechargeable battery is charged in accordance with DIN VDE 0833, part 1 (80% charged in
24 hrs).
The current in the event of an alarm is calculated according to the following formula:
Calculation of current for space protection
I
g
Equipment protection
I
g
Charging current
The power for charging the rechargeable battery is calculated with the following formula:
I
L
I
=
g
where
Ig
IA
2020.04 | 2.1 | F.01U.130.928
FAS / FCS
1/2 b
b
A > 0,5 m 2
(n _
I n I n
. .
= +
A max Q
_
I I (n
.
= + .
n
A Q
0,8 K
.
n
=
24
.
I n I I
+
Q L PS max
= Total current of all connected aspirating smoke detectors in [A]
= Alarm current of an aspirating smoke detector in [A]
FAS / FCS
a
150
1/2 b
b
A ≤ 0,5 m 2
200
) I
max PS max
n ) I
PS max
Operation guide
Conventional Aspiration smoke detector
A Cross-sectional area of
duct (with A = a x b)
a Height of air-conditioning
duct
100
b Width of air-conditioning
duct
100
Bosch Sicherheitssysteme GmbH