Mitel Aastra 470 System Manual page 159

Earthing
The EFOP fan-out-panel has 4 equivalent connections for the protective earthing
(see Fig. 69).
Warning
Because analogue trunk lines are to be routed via the fan-out panel EFOP,
for safety reasons the fan-out panel must be connected to the protective
earth.
Mains power 1
EFOP
Fig. 69 Connection of an EFOP fan-out-panel
Tips
– Use the same mains socket to connect the power supply of the com-
munication server and the power supply of the EFOP fan-out-panel to
the mains power. This prevents an unwanted switchover in the event
of a mains failure on the EFOP fan-out-panel only.
– In redundancy operation, connect the communication server and the
APS2 auxiliary power supply unit to separately protected mains power.
This will further enhance the system's operating reliability.
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
Power supply 1
Copper wire yellow/ green
2,5 mm
4,0 mm
Mains power 2
Power supply 2 (for power
supply redundancy only)
To the earth
connection
2
protected
2 unprotected
To the
communica-
tion server
Installation
Stranded copper
yellow/ green
4,0 mm 2
unprotected
159