Control panel SP231
Alarm system power supply
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Alarm system power supply
2.1
Main supply
The control panel and all alarm system can be fed from the alternating or direct current source. In both cases,
to ensure an uninterrupted supply to the system, the control panel shall be additionally connected to a back-up
supply source – 12 V battery. To ensure the requirements of Standard EN50131, in case of cut-off from the
main supply source, the back-up supply battery shall be of sufficient capacity to provide power from the back-
up source to the system for 12 hours to comply with Grade II requirements or for 60 hours to comply with
Grade III requirements. Assess the current consumption of auxiliary devices, which is provided in chapter 5.2
„Compatible modules“.
2.2
Back-up supply
Upon interruption of power supply to the system from the main supply source, the event AC Failure report shall
be formed and the control panel shall automatically switch over the system for its feeding from the back-up
supply – 12 V battery. When the battery voltage decreases down to 11.5 V, the event Low Battery report shall
be formed. When the battery discharges below 9.5 V, the event Battery Missing/Dead report shall be formed
and the battery shall be disconnected. Upon restoration of the AC mains voltage, the AC Restore report shall be
formed and the battery charging process shall start automatically. The desired charging current from 0.1 to 2.0
A can be set during programming the control panel, see 6.5.1 „General system parameters“. When the battery
voltage restores to 12.6 V, the event Battery Restore report shall be formed.
2.3
Battery supply
In individual case, e.g., for testing, the control panel and all the alarm system can be supplied not through the
main supply port, but only through a back-up supply port, e.g., only from 12 V battery. In this case, in order to
start the control panel (system) it is necessary to connect the battery to the control panel –BAT+ port and click
the circuit board button BAT_ON (see 4 “Control panel structure”).
