Spectra 1728 - 2.14 DOUBLE ZONE INPUTS (WITH ATZ OPTION ONLY); 2.15 FIRE CIRCUITS

12
R
EFERENCE
& I
NSTALLATION
M
ANUAL
2.14 DOUBLE ZONE INPUTS (WITH ATZ OPTION ONLY)
Enabling the ATZ feature (see page 25) allows you to install two detection devices per input terminal. The ATZ
feature is a software-oriented feature. Therefore, there is no need for extra modules, simply connect the devices as
shown in Figure 2-6. Devices connected to input terminals must be assigned to a zone and the zone's parameters
must be defined. Please refer to Zone Programming on page 20 of this manual for more information. The status of
each zone will be displayed on the keypads and the control panel can send separate alarm codes for each zone.
2.15 FIRE CIRCUITS
When zone 3 is defined as a 24Hr. zone (see page 22), the control panel will recognize zone 3 as a Fire Zone,
enabling smoke detectors to be connected as shown in Figure 2-7. Fire zones must use a 1kΩ EOL resistor. If there
is a line short or if the smoke detector becomes active, whether the system is armed or disarmed, the control panel
will generate an alarm.
2.15.1 FIRE CIRCUIT: 4-WIRE INSTALLATION:
In the event power is interrupted, the relay will cause the control panel to transmit the Fire Loop Trouble
report if programmed in section [206]. To reset (unlatch) the smoke detectors after an alarm, install the
smoke detectors as shown in Figure 2-7. Then program the PGM with the "[
PG
]/[
FNC
1
] key was pressed"
activation event (see page 39). Pressing the [
PG
] or [
FNC
1
] key will interrupt power to the smoke detectors
for 4 seconds (see PGM Delay on page 40).
Fi
gure
2
-
6
:
D
ou
bl
e
Z
one
(ATZ)
I
npu
t
C
onnec
ti
ons
Figure 2-7: Fire Zone Connections