User's Manual

Installing the BSDU Hardware Installation Manual
5-18 Airspan Networks Ltd. 02030311-03
5.5. Connecting Power
The BSDU requires a power supply of –48 VDC. If the base station has no
capabilities of supplying 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.
5.5.1. Grounding (Earthing) the BSDU
Before connecting the power supply to the BSDU, you need to ground the BSDU.
To ground the BSDU:
1. Connect one end of the grounding wire (green/yellow) to the grounding lug
screw located on the rear panel of the BSDU chassis.
Figure 5-11: BSDU rear panel with grounding lug screw
2. Connect the other end of the grounding wire to the cabinet rack or any other
customer grounded point at the base station.
Grounding lug
screw