User's Manual

2 68P80801E35-B 5/1/2002
DC Power Supply EBTS System Manual - Vol 2
Single Channel DC Power Supply Overview
Single Channel DC Power Supply Overview
The DC Power Supply provides DC operating voltages to the Base Radio FRUs. It
accepts input voltages from 41VDC to 60VDC. The voltage source may be either
positive or negative ground.
On initial start up, the supply requires nominal 43 VDC. If the voltage drops
below 41 VDC, the DC Power Supply reverts to a quiescent mode and does not
supply output power.
The DC Power Supply is designed for sites with an available source of DC
voltage. Output voltages supplied from the DC Power Supply are 28.6 VDC,
14.2 VDC and 5.1 VDC with reference to output ground. The supply is rated for
575 Watts continuous output at up to 113˚ F (45˚ C) inlet air. At
140˚ F (60˚ C), the 28.6 VDC output lowers to 80% of maximum.
The DC Power Supply consists of the Power Supply and front panel hardware.
The DC Power Supply connects to the chassis backplane using an edgecard style
connector. The DC power supply is secured in the chassis with two Torx screws
located on the front panel.
Figure 1 shows the DC Power Supply with the cover removed.
Figure 1 Single Channel DC Power Supply