Mitel 470 System Manual page 46

Expansion Stages and System Capacity
Mitel 470 housing
CPU2
CPU1
Interface cards
Fig. 10 Overview of the Mitel 470 power supply concept
Notes
– It is also possible to operate the communication server with the external power supply unit
APS2 only In this case redundancy operation is of course no longer possible.
– To ensure that its operation is maintained even in the event of a mains outage, an external
uninterruptible power supply (UPS) must be used.
See also:
For the available power outputs using the various types of power supply and for connecting the
power supplies, see "Powering the communication server", page 102.
46
24 VDC
24 VDC
3.3 VDC 3.3 VDC
control
24 VDC
24 VDC
Redundant
fan unit
=
=
Power
control
control
section
24 VDC
=
~
Standard fan
24 VDC
Auxiliary
power
supply unit
=
~
Mains power
115/230 VAC
Mitel 470 as of R4.1
syd-0585/1.2 – R4.1 – 08.2016