Battery Supervision; Battery Discharge And Recharge Schedule; B520 Auxiliary Power Supply; Sdi2 Address Settings - Bosch B5512 Reference Manual

Control Panel
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.
6.2.3

Battery supervision

The battery charging float level occurs at 13.65 VDC. If the battery voltage drops below 12.1
VDC, the control panel sends a LOW BATTERY report, if programmed to do so.
When the battery voltage drops to 10.2 VDC, the keypad or keypads show low battery
messages. The control panel (if programmed for power supervision) sends a Battery Low
report in the Modem4 communication format. It sends a Low System Battery (302) report in
the Contact ID format.
When battery voltage returns to 13.4 V, the keypads stop showing the low battery messages. If
the control panel is programmed for power supervision, it sends a BATTERY RESTORAL report
in the Modem4 communication format or a Control Panel Battery Restored to Normal (302)
report in the Contact ID format.
If programmed for power supervision, the control panel adds a missing battery event to the
event log. If programmed for battery fault reports, the control panel sends a Battery Missing/
Dead report in the Modem4 communication format, or Control Panel Battery Missing (311)
report in the Contact ID format.
6.2.4

Battery discharge and recharge schedule

Discharge cycle
13.65 VDC - Charging float level.
12.1 VDC - Low Battery Report, if programmed.
10.2 VDC - Minimum operational voltage.
Recharge cycle
AC ON - Battery charging begins and AC Restoral Reports sent.
13.4 V - Battery Restoral Report sent. Battery float charged.
6.3

B520 Auxiliary Power Supply

The optional B520 Auxiliary Power Supply Module provides up to 2 A of 12 VDC standby
power for Fire and Burglar applications. For Burglar applications, an additional 2 A of alarm
power is available, allowing 2 A of standby current and up to 4 A of alarm current.
The B5512 control panels support up to 4 B520 modules. The B4512/B3512 control panels
support up to 2 B520 modules.
Connect B520 Auxiliary Power Supply Modules to the SDI2 bus on the control panel using
terminals PWR, A, B, and COM. This section includes basic installation instructions. For
detailed installation instructions, refer to the Auxiliary Power Supply Module (B520) Installation
Guide for complete installation instructions, and for battery standby time calculations, refer to
the B520 Auxiliary Power Supply Module Battery Standby Chart within the installation guide.
6.3.1

SDI2 address settings

Notice!
The module reads the address switch setting only during module power up. If you change the
setting after you apply power to the module, you must cycle the power to the module in order
for the new setting to take effect.
Bosch Security Systems, Inc. Installation and System Reference Guide
Power supply | en 31
2015.07 | 12 | F.01U.287.180