Table 1-3: Psu Requirements, Configurations With One Npu (Excluding Psu Redundancy); Table 1-4: Psu Requirements, Configurations With Two Npus (Excluding Psu Redundancy) - Alvarion BreezeMAX 3500 System Manual

PIU is sufficient to support a fully populated chassis. Two PIU modules provide
redundant power feeding (two input sources) while avoiding current flow between
the two input sources.
1.4.1.5 Power Supply Unit (PSU)
The single Euro PSU module is a 48 VDC power supply unit. Each
Base Station chassis can contain up to four PSU modules providing
N+1 redundancy configurations.
Table 1-3 displays the number of PSU modules (excluding
redundant units) required for various Base Station configurations
without NPU redundancy (one NPU):
Table 1-3: PSU Requirements, Configurations with one NPU
Number of AUs
1 - 2
3 - 6
Table 1-4 displays the number of PSU modules (excluding redundant units)
required for various Base Station configurations with NPU redundancy (two
NPUs, not supported in current version):
Table 1-4: PSU Requirements, Configurations with two
Number of AUs
1 - 5
6
1.4.1.6 Air Ventilation Unit (AVU)
The 2U high AVU includes a 1U high integral chamber for inlet airflow and a 1U
high fan tray with an internal alarm module. To support high availability Base
Station, the fan tray includes 10 brush-less fans, where 9 fans are sufficient for
cooling a ful
front panel LEDs and a trap that is sent to the management system. To furthe
support high availability, the
tray extracted from it for a period of time sufficient for replacing it (up 10
minutes).
BreezeMAX System Manual
(excluding PSU redundancy)
Minimum Required Number of PSUs
1
2
(excluding PSU redundancy)
Minimum Required Number of PSUs
2
3
ly loaded chassis. A failure in any of the fans is indicated by bot
chassis
NPUs
may operate with the hot-swappable fan
Base Station Equipment
h the
r
11