Appendix B – Power
asafeinstall_dgb, AutroSafe Interactive Fire Detection System, Release 4,
116-P-ASAFE-INSTALL/DGB, Doc-1004796-2, 2021-08-23, Autronica Fire and Security AS
Page 78
16.5 Batteries
The recommended cable parameter for BSF-400 is minimum 1,5mm2 /
15,4 AWG.
There is no minimum requirement for drawing power.
16.6 Power Unit BPS-410
The inputs for the battery and the charger are specified to handle up to
10A. The fuses, F7 battery and F8 Charger, shall have 10A fuses.
Batteries that are to be used with BSF-400 are Fiamm batteries with the
maximum size of 18Ah. The minimum size of batteries is 12Ah.
The maximum current that may be drawn from the batteries when the
primary power source is disconnected is 10A for BPS-410.
The maximum power that may be drawn from BPS-410 is 8A.
max A Maximum battery current output when mains disconnected Fuse F7:
Charger, Battery
The maximum internal resistance for a battery connected to a BSF-400
is 0,6, any higher resistance than this will be detected as a fault in the
battery by BSF-400.
NOTE: If power to the system is supplied exclusively from the batteries
(in case of a power supply failure), and the voltage is below 19V, the
Power Board BSF-400 will perform a controlled shutdown (i.e. the
power is switched OFF).
16.7 Battery Charging
The charging voltage is temperature controlled, so optimal charge for
each temperature is maintained.
Charge current is also controlled, so that the charging voltage will
decrease when the charge current reaches 2A.
A “Battery voltage too low”-warning will display on AutroSafe systems
connected to the BPS-410 via AutroFieldBus. The message will clear
when charge current drops below 400mA.
Attention: The battery temperature sensor must be placed on the
batteries. If the sensor is placed in warmer or colder places, the
charging voltage will be wrong, and lower battery capacity and/or
shorter battery life may be expected.
The charging voltage at 25
o
C is 27, 2 V DC.
Note that when the BSF-400 board is turned OFF and batteries are
connected to the battery termination, the leak current of the batteries is
6mA.
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