User's Manual

6-4 Aviat Networks
Chapter 6. Installing the INU and INUe
Node Card Maximums
From SW release 5.04 improvements in the cooling fan operating logic allow higher
card loadings coupled with maximum ambients to 131
o
F, or 113
o
F).
• From software release 5.04 fan logic improvements allow higher INUe loading when
an NPC is installed.
• An NPC must be fitted in an INUe where specified below. The NPC provides power
supply load sharing with the NCC, allowing the overall loading to be increased.
Should the NPC fail, airflow from the 2RU FAN is increased to compensate.
• Extended FAN failure/impairment detection is included. For example, an alarm will
be raised on a reduction in fan speed (RPM), such as can occur as a result of bearing
wear/friction.
When planning the number and type of cards to be installed in an INUe or INU, the
following rules must be observed. Individual card consumptions are detailed above.
INUe Loading Rules for Operation up to 55ºC (131ºF)
The following loading rules must be followed when dimensioning the total power
consumption of an INUe that is required to operate in ambient temperatures up to
131ºF:
• 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 125 watts. The one exception/condition is that 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 85 watts. This rule applies even if an
NPC and 2RU FAN is fitted.
55ºC (131ºF) operation does not apply to the PCC. Operational
ambient temperatures with a PCC installed must not exceed 45
0
C
(113
0
F).
INUe Loading Rules for Operation at 45ºC (113ºF)
The following loading rules must be followed when dimensioning the total power
consumption of an INUe that is operating in ambient temperatures that do not exceed
45ºC (113ºF):
2+0 or 1+1 FD, High Power
(2xRFU), IRU 600v2
104 76W 180W
1+1 MHSB or SD, High Power
(2xRFU), IRU 600v2
104W 76W 180W
1+1 MHSB or SD, Power Save
Mode (Offline Tx Mute), High
Power (2xRFU), IRU 600v2
82W 42W 124W
Configuration Power Sourced
from INU
Power Sourced
from External DC
Connector
Total DC
Power