Installation manual

D9124 Operation & Installation Manual
Page 29
© 1996 Radionics
74-06799-000-D 2/96
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12 VDC STANDBY
SOURCE BATTERIES
D9142
Figure 17: 12V Standby Batteries
Table 7: Battery Discharge/Recharge Schedule
Installing the 12V Standby Source Batteries
Connect batteries in parallel. Two batteries are
required. Before handling batteries, see the Safety
Section for important information.
1. Place the batteries on the bottom shelf. The longer
set of leads from the battery harness (see Figure
16 ) connects to the battery on the right side of the
battery shelf.
2. Connect the black negative wires from the battery
harness to the negative terminals on the batteries.
3. Connect the red wires from the battery harness to
the positive terminals on the batteries.
Power Supervision
When the battery float voltage drops to 13.8 VDC, the
yellow charging status LED on the D9112LTB
illuminates. When the battery drops to 12.1 VDC, the
red low battery LED illuminates and the panel transmits
a BATTERY LOW report in Modem II Format. In BFSK
it transmits a TROUBLE ZN 9 to the receiver.
Investigate low battery reports immediately. During an AC outage, if the battery voltage
drops below 10.0 VDC, the panel shuts down.
AC Power Failure
The D9112LTB indicates an AC power failure when power is missing. This feature is
programmable. The AC Fail TimeAC Fail Time program item sets the number of seconds that AC
must be missing before the panel acknowledges the failure and the number of seconds
after the power returns before the panel acknowledges the restoral of power.
You can program AC Fail Time AC Fail Time from 1 to 90 seconds. The Radionics default sets ACAC
Fail Time Fail Time at 10 seconds.
If the battery float voltage is less than 10.0 volts during an AC power loss, the panel shuts
down. The display extinguishes at all command centers. When AC power returns, the
panel begins operating. The panel retains the system status it was in at the time of the
shut down.
12 VDC Battery Discharge/Recharge Schedule
These LEDs are on the upper left corner of the D9112LTB board.
Discharge Cycle Recharge Cycle
Float
Voltage
Indication
Float
Voltage
Indication
13.9 VDC
• Battery Fully Charged
• Charging status LED
extinguished
AC On
• Load Shed relay resets
• Battery charging begins
• Battery trouble and AC restoral
reports sent
13.8 VDC
• Charging status LED
illuminated
13.7 VDC
• Battery restoral reports sent
• Low Battery LED extinguished
12.1 VDC
• Battery trouble & AC Fail
reports
• If programmed,Low Battery
LED illuminated
13.9 VDC
• Charging status LED extinguished
• Battery fully charged
10.2 VDC
• Battery Load Shed
(processing continues if AC
present)