AM-8000 Manuale di installazione PAGE - 7
AM8000_manu-inst Doc. 160.1-AM8000-ITA Rev A.3 NOTIFIER ITALIA
BATTERIES Installation
Power supply and battery operation
The main microprocessor of the control unit periodically checks the state of the main AC power supply source, batteries and
the recharging circuit. The control unit will automatically switch on the stand-by battery source when AC mains fails.
When the control unit operates through AC mains, the main microprocessor controls the battery charger output and the
presence of them. To perform this test, the output battery charger is temporarily switched off and the battery voltage is read
(signalling of missing batteries<15.0V).
When the control unit operates as a battery (in the absence of the AC mains) “Low Battery” breakdown will be
indicated when their voltage is <21.5V and, to prevent irreversible damages the voltage will be automatically
switched off, by disconnecting the batteries, when the voltage is < 19,5V.
All wirings MUST be checked BEFORE they are connected to the control unit.
It is recommended to perform at least the following checks:
Check the continuity of all cables used (including the shield )
Ensure that, in alarm conditions, any possible voltage drops do not compromise the
operations of the various devices.
Ensure that the electrical characteristics of all cables used come within the
manufacturer’s specifications (refer to the various sections of this manual)
Check the insulation between all cables and between cables and shield and the
earthing. minimum of 2MΩ insulation is required.
Check that the screen of all signal cables is not earthed in positions other than the
prescribed ones.
Check that the signal cables do not travel together with the power lines..
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