32
SATEL
Installer Manual
Table 1.
Example of control panel power supply load estimation / battery selection.
No. Loads
Max current
Mean current consumption
1
Mainboard CA-6
100 mA
70 mA
2
+ KPD output (keypad max 90 mA, provided
that 3 keypads are installed in the system)
270 mA
45 mA
3
OUT3 output (6 detectors) *
120 mA
80 mA
4
OUT1 and OUT2 outputs
4.4 A **
0.5 A
5
OUT 4 and OUT5 outputs
2 x 50 mA
50 mA
6
Battery charging current
350 mA
-
Total max current consumption by the system with
no alarm signaling
∑
I = 100 mA+270 mA+120 mA+100 mA+350 mA=940 mA
Battery selection based on max. and mean current
consumption by the system, assumed duration of
power failure 12h, assumed 1 alarm with 15 min
(0.25h) duration of signaling
∑
A
Max
=1.25x(0.1x12+0.27x12+0.12x12+4.4x0.25+
+0.1x0.25)
≈
8.8 Ah
∑
A
Av
= 1.25x(0.07x12+0.12x12+0.08x12+0.5x0.25+
+0.05x0.25)
≈
4.22 Ah
Recommended standby power supply: 12 V/7.5 Ah battery
* Assumed current consumption by a single detector 20 mA.
** If the capacity of the power supply is exceeded, the current is supplied from the battery
Notes:
•
The control panel power supply unit has been designed for work with lead batteries
or other batteries with a similar charging curve.
•
It is impermissible to connect to the alarm panel a fully discharged battery (with
voltage on unloaded terminals less than 11 V). To avoid damage to the equipment,
a fully discharged/never used battery should be precharged with the use of a proper
charger.
ATTENTION!
An efficient security system does not prevent burglary, assault or fire from happening,
however it diminishes the risk that such a situation will cause no alarm or notification.
Therefore, the SATEL Company recommends that operation of the whole security
system be regularly tested.
