Stephan Alia - Power Supply, Battery, and Inverter

®
3 Components and functions
© F. Stephan GmbH SA-112-0106V1.0-WEM-GB 25
Communication with the micro controller is limited to the following
signals:
 Batt_enable ( battery voltage ≥ 10.8V)
 Offreq. ( signal of the ON/OFF switch)
A pressure switch detects the external air pressure supply.
If the input pressure is < 1 bar, then the internal compressor is
automatically switched on.
If the compressor is switched off when using an external air supply, this
prolongs the battery mode.
3.2 Power supply
The integrated power supply unit is responsible for connecting the A
LIA
ventilator to the mains power supply.
The cold device connector combination with integrated mains filter
supplies power to the power supply unit.
As an alternative to the mains power supply, the A
LIA can be operated
from an external 12V DC voltage source.
If no external voltage source is available, the integrated rechargeable
battery is automatically used to supply power to the ventilator. The
rechargeable battery provides a backup power supply in the event of a
mains power failure.
The Power Distribution Unit controls the changeover to the provided
voltage source.
Communication with
the micro controller
External air pressure
supply