User's Manual

260-668066-003 Rev 002 October 2001 6-3
Eclipse Installation Manual
Power Consumption and INU Load Maximums
Total power consumed is dependent on the number and type of plug-in cards, and the
number and type of IRU 600s.
• The number and type of RACs and DACs that can be installed in an INU are
determined by the load capacity and temperature limits of the DC converter in the
NCC, which supplies various DC rails to the plug-in cards.
• IRU 600s and FANs are not powered via the NCC converter. Their DC supply is
taken directly from the INU -48 Vdc power supply input connector.
• However, if a PCC is installed for +24 Vdc operation, the INU cards and associated
IRU 600s are supplied from the PCC, meaning PCC power limits are determined by
the INU cards and by the number of IRU 600s fitted.
• A PCC should always be installed to receive maximum FAN cooling. This means it
should be installed in the immediate FAN-side slots in an INU/INUe.
Node Power Consumption
Table 2 lists nominal power consumption figures for Eclipse cards. Use these together
with the IRU600 consumption figures in the following table to determine total nodal
power consumption.
Power consumption figures are for a -48 Vdc supply voltage at normal room ambients.
Table 2. Typical Plug-in Power Consumptions
The table below provides typical figures for IRU 600.
• For a high power RFU, power is supplied via its RAC cable and additionally by a
front-mounted DC connector.
Table 3. Typical IRU 600 and IRU 600v2 Power Consumption
Item Consumption
RAC 60 12W
RAC 6X 13W
DAC (Any variant) 3W
NCC 4W
NPC 4W
AUX 3W
FAN 1RU 2W
FAN 2RU 4W
Configuration Power Sourced
from INU
Power Sourced
from External DC
Connector
Total DC
Power
1+0 High Power (1xRFU), IRU
600, IRU 600v2
52W 38W 90W
1+1 HSB or SD, High Power
(2xRFU), IRU 600
82W 42W 124W