Installing the Base Station Equipment
WILINK I MODULAR BASE STATION SYSTEM MANUAL
33
2.2.3
Power Requirements
Use the following table to calculate worst-case power source requirements for the
Base Station equipment (see also some examples in Table 1-15 on page 19):
Table 2-6: Power Requirements, Base Station Equipment
Unit
Details
Power Source
-40.5 to -60 VDC
PIU
16W maximum (active PIU)
PSU
200W max output power
Efficiency: 80% minimum
NPU
65W maximum
AU-IDU
38W maximum
AU-ODU
38W maximum
AVU
24W maximum
NOTE
The PSU(s) do not supply power to the AU-ODUs that are powered directly from the power source
via the PIU and the back plane.
2.2.4
HOT SWAP Support
The NPU, AU-IDU and new PIU modules includes a blue HOT SWAP LED and a
micro-switch in the injector/ejector handle to support hot-swap control. After
releasing the ejector’s button, the HOT SWAP LED should turn on, indicating that
power to/from the back-panel is disconnected and the module can be removed
safely. For more details refer to Section
2.2.9
.
2.2.5
Power Interface Unit (PIU)
The single Euro PIU module is the interface between the Base Station site’s DC
power source and the Base Station Chassis Power Supply Units and external
ODUs, which receive power via the IDUs.
The PIU filters and stabilizes the Base Station input power and protects the
system from power problems such as over voltage, surge pulses, reverse polarity
connection and short circuits. It also filters high frequency interference (radiated
emissions) and low frequency interference (conducted emissions) to the external
power source. Each Base Station chassis contains two slots for an optional 1+1
PIU redundancy. One PIU is sufficient to support a fully populated chassis. Two
