ELECTRIC FEATURES
GROUND PLANT
Ground plant has to be realised accordin
to CEI and ISPELS rules and it must have a resistance below 10
Ohm (to be measured at the well with disconnected mains).
CONTROL PANEL POWER SUPPLY
Control Panel receives power by mains volta
e, otherwise, if this one is missin
, it works usin
an internal
stand-by accumulator.
Stand-by time depends on the quantity of connected detectors (see table).
Features required for the mains supply are:
•volta
e = 220 VAC sin
le phase + 10%, -15%;
•frequency = 50 Hz +/- 0.5 Hz (+/- 1%).
N.B.: it’s important to pay attention when you have to install a control panel near electromagnetic
sources (ex.: repeaters, radio links, engines, etc.).
POWER SUPPLY
Power supply consists in two section:
1 - main card power supply, detectors and
external devices;
2 - battery-char
er for stand-by accumula-
tors.
N.B.: on the “+ 24 Detectors and External Devices” output are available max 24 V - 3.15 A with batteries
connected. Constant current available is 500 mA (used for detectors).
BATTERY-CHARGER SECTION
•Output volta
e: 27.6 V.
•Output current: 400 mA.
•Quantity of connectable batteries: 2 x 12 V - 5.7 Ah.
•Rechar
e time: about 20 hours (with completely dischar
ed battery).
•Stand-by time (with 2 char
ed batteries 12 V - 7 Ah) and without alarms:
- 24 hours with 1 detector;
- 18 hours with 2 detectors;
- 14 hours with 3 detectors;
- 12 hours with 4 detectors;
- 10 hours with 5 detectors;
- 8 hours with 6 detectors.
•Si
nals from/to power supply (not available on the terminals):
- outputs = mains trouble, dischar
ed battery;
- inputs = batteries test from CPU.
FUSES LIST
•On main volta
e 220 V = 500 mA delayed.
•On siren control = 1 A delayed.
•On battery input = 3.15 A FAST.
DETECTORS LINES POWER SUPPLY
Detectors receive power supply by control panel. Features of such power supply are the followin
:
•volta
e = nominal 24 Volt (27.6 Volt);
•current max = 500 mA;
•fuse = 3.15 A FAST.
VOLTAGE CURRENT NOTES
+ 5 V 200 mA Control panel power supply regulated
+ 24 V 0.5 A Detectors power supply regulated
Doc. M-010.1-MGAS-ENG Installation and Use Manual NOTIFIER ITALIA
MGAS.chp Rev. A.1 Page 3
