Bosch B9512G - Battery Maintenance; Battery Supervision; Battery Charging Circuit Float Charge

Control Panels Power supply | en 39
Bosch Security Systems, Inc. Installation and System Reference Guide 2016.06 | 08 | F.01U.303.996
LED pattern Function Refer to
Off
Battery is fully charged. N/A
Flashing slowly
Battery charge is below 13.4
VDC and the battery is
recharging.
Low battery, page 39 and
Battery restoral, page 39
Flashing quickly
Battery voltage dropped to
between 12.1 VDC and 10.2
VDC.
LED turns off when voltage
reaches at least 13.4 and > 200
mA.
Low battery, page 39 and
Battery restoral, page 39
On Steady
Battery is missing, shorted, or
reversed.
Missing battery, page 39
6.2.3 Battery maintenance
Use 12 VDC sealed lead-acid rechargeable battery (7 Ah, 18 Ah, or 38 Ah). The control panel
supports up to 38 Ah of battery. If you use two batteries, they must have the same capacity
and you must connect them using the D122/D122L Dual Battery Harness.
Replace the batteries every 3 to 5 years. If you install two batteries, replace them both at the
same time.
Record the date of installation directly on the battery.
!
Caution!
Exceeding the maximum output ratings or installing the transformer in an outlet that is
routinely switched off causes heavy discharges. Routine heavy discharges can lead to
premature battery failure.
6.2.4 Battery supervision
Low battery
If the control panel is programmed for power supervision, it sends a Battery Low report in the
Modem4 communication format or a Low System Battery (302) report in the Contact ID
format.
Missing battery
If the control panel is programmed for power supervision, it sends a Battery Missing/Dead
report in the Modem4 communication format, or a Control Panel Battery Missing (311) report
in the Contact ID format.
Battery restoral
When AC returns and the battery is charged, If the control panel is programmed for power
supervision, it sends a Low System Battery Restore report in the Modem4 communication
format or a Control Panel Battery Restored to Normal (302) report in the Contact ID format.
6.2.5 Battery charging circuit float charge
The float voltage for the battery charging circuit is 13.65 VDC when operating within load
range.