Planning the Installation
Page 9
including two 15-minute periods in alarm. This meets the requirements of EN50131-1 or
PD6662 Grade 2. When two batteries are used, they are capable of powering the system
for at least 24 hours.
Output devices or other equipment can be powered from the control unit (see note above),
providing you make sure that the power supply has sufficient capacity to do so. The power
supply is rated at 1.5A max, of which:
220mA (1 battery used) or 440mA (2 batteries used) is reserved for battery
charging.
320mA (max) is needed for the control unit's PCB (excluding a plug-on module).
140mA (max) is needed for a plug-on module (if fitted).
If a plug-on module is fitted, 820mA is available for external devices if one battery is used,
or 600mA if two batteries are used.
If a plug-on module is not fitted, 960mA is available for external devices if one battery is
used, or 740mA if two batteries are used.
Wired 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 method 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 (page 12).
The wiring types are as follows.
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 1). The resistors allow the system to monitor for short-
circuit or open-circuit conditions to guard against cable tampering.
Figure 1. FSL Connections (using 2k2 and 4k7 resistors)
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 2.
EOL
Alarm
Tamper
