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2.2.1 Backup power calculation
The following shows a simplified example of checking power availability.
Device (quiescent)
Panel PCB
10 x PIRs at 15mA each
2 Keypads at 25mA each (backlights off)
Plug-by digital communicator
Siren
Total
During an alarm, the current consumptions are:
Device (in alarm)
Panel PCB
10 x PIRs at 15mA each
2 x Keypads at 65mA each
Plug-by digital communicator
Siren
Total
Since the panel´s power supply can provide 820mA (excluding battery charging), the above shows
that the power supply is able to power the system during an alarm (725mA). Calculation for the
battery capacity:
(0.3A x 11.5h) + (0.725A x 0.5h) = 3.81Ah
2.3 Detector (zone) wiring types
Before installation, you need to choose the wiring type (method) to use for any wired detectors:
Fully-Supervised Loop (FSL), 4-wire Closed Circuit (CC), or 2-wire CC, as described below. You must
use the same wiring type for all wired detectors.
You will need to ensure that all detectors are wired correctly and that you select the default
wiring type during the initial power-up procedure.
2.3.1 Fully Supervised Loop (FSL)
This uses a single pair of wires for each detector, with resistors at the end of the line and across
the alarm contact (Figure 2). The resistors allow the system to monitor for short-circuit or open-
circuit conditions to guard against cable tampering.
The End-of-Line (EOL) and alarm contact resistors can be any of the following values
(respectively): 2k2 and 4k7, 1k and 1k, 2k2 and 2k2, or 4k7 and 4k7. The resistance bands for FSL
are as shown in Table 4.
Figure 2: FSL connections for 2k2/4k7, 1k/1k, 2k2/2k2 and 4k7/4k7
FSL with 8k2/8k2 resistors (for use with Guardall
Alarm
EOL
Tamper
®
resistors)
Figure 3: FSL connections for 8k2/8k2
Current
40mA
150mA
50mA
25mA
35mA
300mA
Current
70mA
150mA
130mA
150mA
225mA
725mA
17
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