Functions
The PSU implements the following functions:
l Converts 110 V or 220 V AC power into -48 V DC power. The power monitoring unit
(PMU) adjusts the output voltage.
l Provides protection against overcurrent, overvoltage, and overheat.
l Dissipates heat using built-in fans.
Exterior
Figure 4-8 shows the PSU exterior.
Figure 4-8 PSU exterior
NOTE
A scanner is required for stock management to scan the two-dimensional bar code on the front panel of the
PSU.
Indicators
Figure 4-9 shows the indicators on the front panel of the PSU.
Figure 4-9 Indicators on the front panel of the PSU
(1) Power indicator
(2) Protection indicator (3) Fault indicator
Table 4-9 describes the indicators on the front panel of the PSU.
BTS3900C (Ver.C)
Hardware Description 4 BTS3900C Power System
Issue 03 (2013-05-27) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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