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3.2.3
Redundancy and Alternate Powering Configurations
Note: The use of DC supplies of less than 55v will reduce the usable distance between
Canopy 150/300 PIDU and Canopy 150/300 Mb BH ODU see Figure 6 .
WARNING The maximum distance from the ODU to the connected network equipment is
100m when using 1000BaseT. Powering distances over 100m are only applicable when using
a 1000BaseSX (Fibre Optic) connection.
3.2.3.1 External DC Supply Only
For use where there is no AC mains supply.
DC
Supply
3.2.3.2 External DC Supply and AC Supply
To give redundancy through the use of mains and DC supply.
Issue 1.1 April 2006
SPIDU to ODU Cable Length
300
280
260
240
220
200
180
160
140
120
45
46
47
Figure 6: Canopy 150/300 PIDU to ODU Cable Length Graph
-
DC Out
+
Power
-
DC In
+
To Network
To ODU
Equipment
Figure 7: 150/300 PIDU - External DC Supply Only
48
49
50
51
52
DC Supply Voltage (V)
Ethernet
53
54
55
Page 25
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