Appendix B - Power Supply
Installation Handbook, AutroSafe Interactive Fire Detection System, Release 4, 116-P-ASAFE-INSTALL/DGB Rev. I, 2014-04-01,
Autronica Fire and Security AS
Page 85
15.12 Battery Resistance Measurement
Every fourth hour, battery impedance measuring is conducted.
This is conducted by lowering the PSU voltage so that all loads are
powered from the batteries for a period of 60 seconds, then a built in
resistor is turned ON for 2 seconds. BPS-405/BPS-410 will then
measure the voltage increase between the resistor ON and OFF and
thus calculate the battery resistance. This measurement includes the
wires to and from the battery.
The battery high resistance fault is given when the total resistance of
the battery and battery cables is:
If such a fault is given, check the cable resistance or replace the
batteries.
15.13 Electronic fuses
15.13.1 Power outputs
Power outputs A1, A2, B1, B2, C1 and C2 are protected by both
electronic and regular fuses. The electronic fuses will trip if a current
between 3.5A and 7A is drawn. The electronic fuse will turn OFF
power within approx. 10ms of a short circuit. The BSF-400 will try to
turn ON power 3 times with ~50s interval between each try.
If an external fault is not resolved, BSF-400 will not try to re-power
more than 3 times. A reset on an AutroSafe panel or pushing reset
button S1 will force the BSF-400 to retry.
IMPORTANT:
To be safe, remove regular fuse before troubleshooting external faulty
equipment.
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