Huawei BBU3900 - Ueiu

LTE TDD
BBU3900&BBU3910 Description
1 Overview
Issue 01 (2018-02-05)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
15

Both the UPEUa and the UPEUc support two links of RS485 signals and eight links of
Boolean signals.

The UPEUd converts -48 V DC input power into +12 V DC and provides an output
power of 650 W.
Ports
The UPEUa , UPEUc and UPEUd both provide the same ports as described in Table 1-12
Table 1-12 Ports on the UPEU
Label Connector Number of
Ports
Description
-48 V 3V3 1 Provides –48 V DC power input.
EXT-ALM0 RJ45 1 Receives Boolean signal inputs 0 to
3
EXT-ALM1 RJ45 1 Receives Boolean signal inputs 4 to
7
MON0 RJ45 1 Receives RS485 signal input 0
MON1 RJ45 1 Receives RS485 signal input 1
1.3.10 UEIU
The UEIU is short for universal environment interface unit. It transmits information reported
by the environment monitoring device and alarm information to the main control board.
Panel
Figure 1-22 shows the panel of the UEIU.
Figure 1-22 UEIU panel
Functions
A UEIU performs the following functions:

Provides two links of RS485 signals.

Provides eight links of Boolean signals.