3 Components and functions
22 SA-112-0106V1.0-WEM-GB © F. Stephan GmbH
3.1.3 Power Distribution Unit PDU
Fig. 15: Power Distribution Unit PDU
1 PDU board
The task of the Power Distribution Unit PDU is to safeguard operating
voltage and the constant current charge for the rechargeable battery.
Visual and acoustic alarms are generated for error statuses.
If the output voltage of the power unit is greater than that of the battery,
then the A
LIA ventilator runs completely off mains power.
If the output voltage of the power unit falls below that of the battery
(power failure, voltage fluctuations, etc.) then the ventilator runs off the
battery. This happens without electronic changeover (parallel mode).
The Power Distribution Unit PDU can only be switched on by a switched
on by a rechargeable battery. This can also be discharged (≥ 10.8 V).
1
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