Bosch D4412 - Battery Charging Circuit - Float Charge; Battery Discharge;Recharge Schedule; System Status LED; External Power Supply

D6412/D4412 Operation and Installation Guide
Page 20 © 2003 Bosch Security Systems45349E
D6412/D4412
Power Supply
CAUTION
Investigate low battery reports immediately: If primary (AC) power is off and the discharge continues, the panel
becomes inoperative when the battery voltage drops below 10.2 VDC.
4.2.5 Battery Charging Circuit - Float Charge
The float voltage for the battery charging circuit is 13.5 VDC to 13.9 VDC at a maximum current of 1.4 A.
4.2.6 Battery Discharge/Recharge Schedule
Discharge Cycle
• AC Off: Command centers indicate trouble. AC Fail Report sent as programmed.
• 13.8 VDC: Charging float level
• 12.1 VDC: Low battery trouble at command centers. Low Battery Report as programmed.
• 10.2 VDC: Panel shuts down as voltage falls below 10.2 VDC
Recharge Cycle
• AC On: Panel restarts, battery charging begins, AC Restoral Report sent as programmed, AC trouble clears from
command centers.
• 13.0 VDC: Battery restoral reports sent, battery trouble clears from command centers
• 13.8 VDC: Battery float charged.
4.2.7 System Status LED
The System Status LED shows system status, including power supply status as described in Table 4. See Figure 4 for the
location of the LED on the panel.
System Status LED Display
System Normal
On for 50 ms; Off for 1 sec.
Battery Missing
Off for 200 ms; On for 1 sec.
AC Missing
Off for 200 ms; On for 200 ms
Off for 200 ms; On for 1 sec.
Phone Ringing
Flickers for 1 sec. as each ring is detected.
Phone Line Seized (panel using phone line)
On solid.
Shut Down (system voltage below 10.2 VDC)
Off for 200 ms; On for 200 ms
Off for 200 ms; On for 200 ms
Off for 200 ms; On for 1 sec.
Table 4: System Status LED Description
4.3 External Power Supply
The external power supply (not supplied) is not intended to provide power to
indicating devices for burglary and fire applications.
• Burglary Applications use a UL603 Listed burglar alarm power supply
with an operating voltage range of
11.8 VDC to 12.4 VDC for Bank Safe/Vault applications (72 hrs. of
standby battery required).
• Fire Applications use a UL1481 Listed power supply operating voltage
range of 11.8 VDC to 12.4 VDC for fire applications.
L-2Com L-3
System Status LED
Figure 4: System Status LED