Battery Maintenance; Battery Supervision; Battery Charging Circuit Float Charge - Bosch B9512G-E Installation Manual

38 en | Power supply
LED pattern
Flashing slowly
Flashing quickly
6.1.3

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 use a D22/D122L to connect them.
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!
Heavy discharges possible
!
The system can have heavy discharges if you exceed the maximum output ratings or install
the transformer in an outlet that is routinely switched off. Routine heavy discharges can lead
to premature battery failure.
6.1.4

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.
6.1.5

Battery charging circuit float charge

The float voltage for the battery charging circuit is 13.65 VDC when operating within load
range.
2018.07 | 10 | F.01U.303.996
Function
Battery is fully charged.
Off
Battery charge is below 13.4
VDC and the battery is
recharging.
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.
Battery is missing, shorted, or
reversed.
On Steady
Installation Manual
Control Panels
Refer to
N/A
Low battery, page 38 and
Battery restoral, page 38
Low battery, page 38 and
Battery restoral, page 38
Missing battery, page 38
Bosch Security Systems, Inc.