Wiring Recommendations - Simplicity 64 Installation Manual

Simplicity 64 Simplicity 126
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13. WIRING RECOMMENDATIONS

With an addressable system, some care must be taken when calculating the appropriate cable gauge
for the system.
The main limitation is that during an alarm condition (maximum current draw), the voltage at all
detectors must be at least 17 Volts with at least 5V of superimposed data signal.
The exact calculation equations are beyond the scope of this manual, because of the distributed load
of the sounders on the loop, but the following table gives a rough guide for maximum cable lengths at
various current loads for 3 different cable gauges
Maximum Loop Current (in Alarm)
1mm CSA cable
1.5mm CSA cable
2.5mm CSA cable
EG. A system with a maximum load of 300mA using 1.5mm cable can have a maximum loop run of
1250 m end to end.
Approved Document No: GLT.MAN-107
Issue : 1.04 Authorised: GH
INSTALLATION MANUAL.
500 mA
500 m
750 m
1000 m
Date: 05/10/2004
400 mA 300 mA
625 m 830 m
930 m 1250 m
1250 m 1660 m
200 mA
1250 m
1870 m
2500 m
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