User's Manual

ECLIPSE INSTALLATION MANUAL
Elevated ambi ent temperatures should be avoided. The
ambient temperature is the air temperature in the immediate
operati ng environment of the chassis, which if installed in a
rack, is the ambient applying to its location withi n the rack.
CAUTION: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.
l One PCC supports a maximum three IRU 600v1 or v2 RFUs, plus any
combination of RACs and DACs.
l One PCC supports a maximum two IRU 600v3 RFUs, plus any combination of
RACs and DACs.
l The PCC +ve and -ve input terminals are isolated from chassis (ground). The -
ve input is grounded by the -ve grounded power supply connection.
l The PCC 20A fuse is fitted in the +ve input. It is a PCB mount type and is not
field replaceable.
l 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.
l 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
an be supported.
l Ambient temperatures must not exceed 45
0
C (113F). The PCC should always
be installed next to the FAN card to get best air flow cooling.
l 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 RFUs.
l When installed in an INUe the INUe must be fitted with the 2RU FAN module
as it provides almost double the air flow of the 1RU FAN modules.
l The PCC must be connected to the NCC before applying power to the PCC to
avoid a current-inrush trip (overload) on the PCC.
l The PCC can be plugged into any INU/INUe option slot. It is not connected to
the backplane and its function is not monitored within Portal.
l Where an NPC is fitted, two PCCs are required for +24 Vdc operation, one for
the NCC, the other for the NPC. This means an INUe must be used for NCC +
NPC operation.
l If the PCC front-panel LED is not lit, it indicates the existence of abnormal
conditions such as output under-voltage, output over-voltage, loss of input
power, output over-current, or open input fuse.
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