D2012 Installation Manual
Page 7
© 1997 Radionics
8/11/97 P/N 35122B
Continue Connections to the Panel
Power Down First
Unplug the transformer and disconnect the battery to
make the remaining connections to the panel.
Alarm Output
Terminals 4 and 5 (+Alrm-)
The Alarm Output terminals provide a 10.2 VDC to 13.9
VDC output when activated.
The positive (+) terminal
provides steady positive output. The negative (-)
terminal provides a pulsed or steady negative output as
programmed.
Use this power for bells, siren drivers, piezo fire sounders,
electronic horns, or other devices.
Available Power
The panel combines power produced by the power supply
with power from the secondary power source (the battery)
to produce a total of 1.5A of alarm power at the Alarm
Output terminals.
D126 Battery required for fire and combined fire/
burglary systems: In order to meet standby battery
requirements, use the Radionics D126, 12 V 7.0Ah
battery for fire and combined fire/burglary systems.
Fire System Power Formula
To calculate the current available at the Alarm Output
terminals for fire and combined fire/burglary systems:
1. Add together the current draws for all devices
connected to the negative alarm output terminal.
This total is the current required for the Normal
Standby Condition (NSC). This total must be less
than 140mA.
2. Subtract the NSC current required calculated in step
1 from the Primary Alarm Current, 860mA. The
difference is the Alarm Current available for the
Alarm Output terminals.
In formula format:
Primary Alarm Current - NSC current
required = Alarm Current available
Keypads
Terminals 6, 7, and 8 (Data, and +Aux-)
You can connect up to eight keypads to the panel.
The installation sheet packed with each keypad contains
mounting instructions. Wire keypads to the panel in
parallel as shown in Figure 3.
You must use a minimum of five feet of wire (22 AWG)
when connecting the keypad to the panel. A short on
the positive Aux terminal (terminal 7) within five feet of the
panel prevents the panel from operating correctly.
Maximum wire length for all keypads connected to Data
and Aux (+,-) terminals (terminals 6, 7, and 8) combined
is 500 feet (22 AWG).
Extra power needed for more keypads. Review
Power
Outputs on page 12 to determine the total power output
requirements for your system. Instructions for using stand
alone power supplies are included.
Figure 3: Keypad Wiring
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