User's Manual Part 2b

Hardware Installation Guide Installing the BSDU
02030311-05 Airspan Networks Ltd. 5-21
Note: If you have multiple BSDUs at a base station (i.e., daisy chained
BSDUs), the connection to any BSDU 100Base-T provides management to all
the BSDUs in the daisy chain.
5.12. Connecting to Power
The BSDU requires a power supply of –48 VDC. If the service provider’s base
station cannot supply AC-to-DC voltage, the BSDU can be powered by an optional
WipLL BSPS unit (see Chapter 7, “Installing the BSPS”) that supplies –48 VDC
power as well as power redundancy. Table 5-2 lists the BSDU's power requirements.
Table 5-2: BSDU power requirements
Parameter Value Comment
Voltage -48 VDC nominal
• Minimum -38 VDC
• Maximum -55 VDC
Power consumption Maximum 300W
Including the feeding of six
BSRs
Note: Before you can connect the BSDU to a power supply, you need to
ground (earth) the BSDU.