User Guide: PTP 600 Series
Powered indoor unit (PIDU Plus)
phn-0896_012v000
Jul 2010
1-13
Redundancy and alternative powering configurations
The PTP 600 Series can be powered from an external DC source and can be provided
with power supply redundancy as follows:
•
External DC supply only (
Figure 1-10
): This configuration is for use where there
is no mains supply.
•
External DC supply and AC supply (
Figure 1-11
): This configuration provides
redundancy through the use of mains and DC supply.
•
External DC supply and redundant AC Supply (
Figure 1-12
): This configuration
guards against mains failure and failure of the DC output of single PTP
300/500/600 PIDU Plus.
NOTE
The use of DC supplies of less than 55v will reduce the usable distance
between the PIDU Plus and ODU (
Figure 1-9
).
Figure 1-9 Relationship between DC voltage and cable length
80
230
0
50
100
150
200
250
45
46
47
48
49
50
51
52
53
54
55
DC supply (Volts)
Cabl
e l
e
ngth
(metr
es)
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