User's Manual

260-668066-003 Rev 002 October 2001 6-5
Eclipse Installation Manual
• If the total power consumption of all cards installed exceeds 85 watts, an NPC must
be fitted, a 2RU FAN card must be fitted, and 5.04 or later SW loaded.
• With this configuration confirmed (NPC + 2RU FAN + 5.04 SW or later) the
maximum INUe loading enabled is 150 watts. The exceptions/conditions to this rule
are:
• INUe loading is limited to 140 watts if the installed total of DAC GE3 cards exceeds
two.
• The combined installed total of DAC GE3 cards must not exceed four.
• If an earlier version of SW is loaded, the maximum INUe loading allowed is 105
watts. This rule applies even if an NPC and 2RU FAN is fitted.
Elevated ambient temperatures should be avoided. The ambient
temperature is the air temperature in the immediate operating
environment of the chassis, which if installed in a rack, is the ambient
applying to its location within the rack.
The ambient temperature maximums must not be exceeded.
Over-temperature operation is a primary factor affecting long
term component reliability.
PCC +24 Vdc Operation
The PCC is for use with standard +24 Vdc (-ve grounded) battery-backed power supply
systems. One PCC supports a maximum three IRU 600 RFUs, plus any combination of
RACs and DACs.
• The PCC +ve and -ve input terminals are isolated from chassis (ground). The -ve
input is grounded by the -ve grounded power supply connection.
• The PCC 20A fuse is fitted in the +ve input. It is a PCB mount type and is not field
replaceable.
• Reverse polarity protection is provided. The PCC will automatically recover from a
reverse polarity connection - the fuse will not blow. Over temperature thermal
protection is included.
• The PCC load maximum is 200 Watts. Use the power consumption data in the
preceding section to determine the maximum number of cards and RFUs that can be
supported.
• The PCC conversion efficiency is nominally 10%. To determine the power consumed
by the PCC, use a figure of 10% of the power consumed by the INU/INUe cards and
IRU 600 RFUs.
• When installed in an INUe, the INUe must be fitted with the 2RU FAN module as it
provides almost double the air flow of two 1RU FAN modules.
• The PCC should always be installed next to the FAN card to get best air flow cooling.