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5.2.3
Replacing the Battery
Replace batteries every 3 to 5 years under normal use.
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.
D8132 Boost Battery Backup: Adding a D8132
Battery Charger Module supports additional batteries
of up to 27 Ah capacity, if required.
The D8132 Battery Charger Module can be used to
connect two additional batteries for a total of four.
The control panel plus any connected D8132 Modules
and auxiliary power supplies must be on the same AC
circuit to discharge evenly if AC power fails. The
number of D8132 Modules is determined by the
number of available outlets on the same circuit. Refer
to the Standby Battery and Current Rating Chart in the
D9412GV2/D7412GV2 Approved Applications Compliance
Guide (P/N: F01U003806) for battery standby time
calculations.
In applications where the supervision of two
batteries is required by the AHJ, use a D113
Battery Supervision Module.
5.2.4
Battery Supervision
When battery voltage drops to 13.8 VDC, the yellow
Charging Status LED lights. When the battery voltage
drops to 12 VDC to 11.8 VDC, the red Low Battery
LED lights, and the keypad or keypads display SERVC
LOW BATT. The control panel (if programmed for
power supervision) sends a BATTERY LOW report in
2
the Modem IIIa
communication format. It sends a
TROUBLE ZN 9 report in the BFSK format.
If the battery is missing or shorted, the red Low Battery
LED flashes at the same rate as the green Operation
Monitor LED. If the control panel is programmed for
power supervision, it sends a BATTERY MISSING
report in the Modem IIIa
TROUBLE ZN 9 report in the BFSK format.
When battery voltage returns to 13.7 VDC, the Low
Battery LED turns off and the keypad or keypads clear
the SERVC LOW BATT message. If the control panel is
programmed for power supervision, it sends a
BATTERY RESTORAL report in the Modem IIIa
communication format or a RESTORAL ZN 9 report in
the BFSK format. At 13.9 VDC, the yellow Charging
Status LED stops lighting.
Bosch Security Systems, Inc. | 5/05 | F01U003805B
D7212GV2 | Operation and Installation Guide | 5.0
2
communication format, or
2
Figure 6:
Charging and Battery LEDs
LEDs Off When Normal
YEL
RED
Investigate Low Battery reports immediately: If
primary (AC) power is off and the discharge continues,
the control panel becomes inoperative when the
battery voltage drops below 10.2 VDC.
5.2.5
Battery Charging Circuit
Float Charge
The float voltage for the battery charging circuit is
13.9 VDC at a maximum current of 1.4A, less any
devices connected to the control panel. If the float
voltage drops below 13.8 VDC due to overload or
battery discharge, the yellow charging status LED
lights.
Loss of AC Load Shed Relay protects battery:
During an AC power loss, the battery supplies all
power to the security system. If the battery voltage falls
below 10.0 V during an AC power loss, a load shed
relay isolates the battery from the control panel and
disables the control panel. Load shed protects the
battery from being damaged by deep discharge. When
AC power restores, the load shed relay reconnects the
charging circuit on the control panel to the battery and
the battery begins to recharge
Overcharge Load Shed With AC Present: If more
than 1.4 A of auxiliary current draw from the control
panel occurs, the battery supplies the current and
begins to discharge. If this situation is not corrected, the
battery continues to discharge and at 11.8 VDC to
12.0 VDC, the keypads display Serv Low Batt.
When the battery voltage drops below 10.0 VDC, the
control panel shuts down. Remove all loads to the
control panel and disconnect AC power. Add a new
battery and reconnect AC power.
Reset the control panel by momentarily placing the
reset pin in the disable position. Refer to Figure 4 on
page 16. The red Low Battery LED continues flashing
until the control panel resets.
Power Supply
Charging Status
Low Battery
21
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