Huawei BTS3900C Hardware Description page 80

BTS3900C (Ver.C)
Hardware Description
Figure 3-33 UPEUc panel
(1) BBU power switch
Figure 3-34 UPEUd panel
(1) BBU power switch
Functions
The UPEU performs the following functions:
l
l
Table 3-56
Issue 03 (2013-05-27)
NOTE
The UPEUc and UPEUd have silkscreens "UPEUc" and "UPEUd" indicating their board types on them,
respectively, whereas the UPEUa and UPEUb do not have such silkscreens indicating their board types.
The UPEUa and UPEUb, however, can be distinguished by the silkscreens "-48 V" and "+24 V" on them.
Converts -48 V DC or +24 V DC power into +12 V DC power, which is the operating
voltage of the boards.
Provides two ports with each receiving one RS485 signal and another two ports with each
receiving four Boolean signals. The Boolean signals can only be dry contact or Open
Collector (OC) signals.
describes the specifications.
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3 BTS3900C Modules
(2) 3V3 connector
(2) 3V3 connector
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