Table 5-2 Ports on the HEUB
Silkscreen Connector Description
ELU RJ45 connector Electronic label port
ExtFAN 4-pin connector Power port for the outer air
circulation fan
IntFAN 4-pin connector Power port for the inner air
circulation fan
TEM 4-pin connector Port connected to the
temperature sensor
AC_SPD Bare wire Port for collecting the AC
input surge protection alarm
GATE Bare wire Port for the door status sensor
COM_IN RJ45 connector Port for reporting monitoring
signals
COM_OUT RJ45 connector Port connected to the
ETP48100-A1
PWR 3V3 power connector -48 V DC input port
5.3.2 PMU 11A
The power monitoring unit 11A (PMU 11A) manages the power system, monitors power
distribution, and reports alarms.
Exterior
Figure 5-5 shows a PMU 11A.
Figure 5-5 PMU 11A
BTS3900C (Ver.C)
Hardware Description 5 BTS3900C Monitoring System
Issue 03 (2013-05-27) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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