EN
Technical description
SMP 301-07
10
5
Technical description
The power supply unit can be connected to an external power supply and to a
battery.
The integrated priority circuit automatically switches over from battery operation to
mains operation when an external power supply is available.
In mains operation, the power supply unit supplies consumer units with a constant
DC of 12.7 V. The battery is disconnected from the consumer units automatically and
is charged via the battery charger.
Battery operation is activated automatically if mains operation is deactivated. The
consumer units connected are supplied with energy via the battery.
In mains operation, the battery charger supplies the battery with a constant charging
voltage. The battery charger can supply a charging current of up to 20 A until a
battery voltage of 12.7 V is reached. The battery charger can supply a charging
current of up to 5 A at a battery voltage in excess of 12.7 V. The charging process for
the battery is shorter if as many consumer units as possible are switched off. Once the
battery is fully charged, the battery charger supplies it with a float charge.
The battery charger has the following safety functions:
•
Overheating protection:
The charging current is reduced if the ambient temperature is too high.
•
Deep discharge protection:
Battery operation is deactivated if the battery voltage drops below 10.8 V.
SMP301-07-IO-7s.book Seite 10 Montag, 16. Januar 2017 1:08 13
