Internal Power Supply Unit; External Auxiliary Power Supply Unit - Aastra 470 System Manual

Installation
4. 4. 1

Internal power supply unit

The communication server is powered via the supplied mains power cord.
The following points are to be observed:
• The mains connector acts as a disconnecting device and must be positioned so
that it is easily accessible.
• The voltage converter must be set to the voltage of the connected mains power
(see Fig. 23).
Warning
PCBs may be damaged or become defective if the communication
server is operated on 230 V mains power and the voltage converter is
set to 115 V.
4. 4. 2

External auxiliary power supply unit

The use of the external auxiliary power supply unit APS2 is necessary to increase the
operating reliability (redundancy operation) or if the internal power supply unit is
no longer sufficient based on the power requirement calculations or any event mes-
sages generated (power supply overload). It is also connected directly to the 230
VAC or 115 VAC mains. However, unlike the internal power supply unit it does not
have a voltage converter. The voltage automatically adapts to the mains voltage.
Fig. 23 Power supply to the communication server
104
Voltage selector
+ –
24 VDC
Auxiliary power suply
unit (APS2)
Mains power
115/230 V
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013