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Installation
86
Aastra 470 as of R1.2
syd-0337/1.2 – R1.2 – 11.2011
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
messages 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 volt-
age.
Fig. 24
Power supply to the communication server
Note
For an external power supply use the optional auxiliary power supply unit
APS2 exclusively.
Mounting the auxiliary power supply APS2
The auxiliary power supply APS2 is supplied with a fastening kit that includes two
fastening plates and 6 screws. If a fan-out-panel (FOP) is already fitted, the auxiliary
power supply can be installed behind the connection panel.
The following diagram shows the fan-out-panel from below with the auxiliary
power supply fitted.
24 VDC
+
–
230V
Auxiliary power suply
unit (APS2)
Voltage converter
Mains power
115/230 V