D2412 Installation Manual
Page 12
8/11/97 P/N 35115B
© 1997 Radionics
Investigate low battery reports right away: If primary
(AC) power is off and the discharge continues, the panel
becomes inoperative when the battery voltage drops
below 10.2 VDC.
If the battery is disconnected, it takes 60 seconds for
the panel to recognize the condition.
Battery Charging Circuit Float Charge
The float voltage for the battery charging circuit is 13.9
VDC. Deduct any continuous load for devices connected
to the panel from 1.0A to find the maximum current
available for charging. At 13.9 VDC the battery is fully
charged and is maintained with a trickle charge of approxi-
mately 5.0mA.
Battery Discharge/Recharge Schedule (No AC Power)
Discharge Cycle
AC OFF
The Keypad indicates trouble.
AC Fail reports if programmed.
13.9 VDC
Charging float level.
12.1 VDC
Low Battery reports.
10.2 VDC
Panel shuts down below 10.2 VDC
Recharge Cycle
AC ON
Panel restarts, battery charging begins,
AC restoral report sent.
13.0 VDC
Battery restoral reports sent, the keypad
returns to normal operation.
13.9 VDC
Battery float charged.
Power Outputs
D2412 Circuit Protection
Two self-resetting protection devices protect the panel
from short circuits on both the auxiliary and alarm power
outputs.
Bell circuit protection: A short on the alarm power
output while the bell is ringing disables this output until it
times out or you perform a panel reset.
Extra Power for Keypads or Other Powered Devices
You may need to add one or more D8132 Battery Charger/
Power Supply Modules for the number of keypads you
want to use. Figure 10 shows the D8132 powering
keypads in a stand-alone configuration.
For UL Certificated accounts, use a UL listed power
supply. The D8132 is not UL listed as a stand-alone power
supply for fire and burglary applications.
D2412 and D8132 (or other power supply) must share
COMMON: Note that Figure 10 shows the common from
the D8132 module connected to both keypad’s common
and the Aux- (common) terminal on the panel. Do not
connect the stand-alone power supply to earth ground.
Figure 10: Power for Keypads
Telephone
Dialing Format
You can program the panel to use DTMF or pulse dialing.
See
Phone Parameters in the Program Entry Guide.
Communication Failure
After 5 attempts to reach the receiver (10 attempts if two
phone numbers are programmed), the panel goes into
communication failure. The panel clears any reports in its
phone buffer. The panel sounds a tone at the keypad
indicating trouble.
Pressing the Clear key silences the tone. When communi-
cation restores (a report is acknowledged by the receiver),
the keypad returns to normal operation.
Ground Start
Some telephone systems require a momentary ground
input to initiate dial tone. To interface with a ground start
system, connect a D133 (or D134) relay as shown in
Figure 11 on the following page. See
RELAYS Group in
the
Program Entry Guide for instructions on programming
the external relay output for Ground Start.
The panel’s ground terminal must be connected to an
earth ground reference.
Warning: You cannot use ground start phone systems for
fire or combined fire burglary systems.
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