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Fire Alarm Computer 8000C / M
Protection against deep discharging of the batteries (BR2)
In case of loss of the mains voltage the control panel will be powered without a interruption by the
connected battery. Depending on the capacity of the battery a backup time of up to 72 hours can
be realized. After that time the external alarm devices must be still operable in an alarm condition.
The activation of these devices must be still possible with a minimum battery voltage of 10.5V DC.
Fig. 25: Jumper BR2 on the Power supply module
As soon as the voltage of the batteries goes below 9.5V the battery backup will get disconnected
to protect the batteries and the control panel. The control panel is no longer operational.
Eliminate the trouble condition of the mains power supply and turn/switch on the control panel. The
connected batteries will get charged automatically if the voltage of the batteries during the battery
test without external load is higher than 10.5V DC. A battery failure will be indicated if the voltage
of the batteries does not exceed this level. Discharged batteries have to be recharged with an
external power supply or need to be replaced. The protection for deep discharging of the batteries
can be enabled / disabled with the jumper BR2. (BR2 closed = battery protection enabled / BR2
open = battery protection disabled)
Exhausted batteries (off-load voltage U
battery
< 10,0V DC) will not charge correctly. Only th
battery types approved by the fire alarm control panel manufacturer may be used fo
supplying the fire alarm control panels with backup power. Please pay attention to th
manual of the manufacturer of the batteries. It is possible that deep discharged batterie
can not be used and need to be replaced.
ower supply module
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