Functions
The PMU 11A performs the following functions:
l Manages the power system.
l Reports the battery temperature.
l Monitors power distribution and reports alarms.
Ports
Figure 5-6 shows the ports on the PMU 11A and Table 5-3 describes these ports.
Figure 5-6 Ports on the PMU 11A
Table 5-3 Ports on the PMU 11A
No.
Silkscreen Connector Description
1 GATE 2-pin connector Connects to a door status
sensor
2 TEM_BAT 2-pin connector Reserved for a battery
temperature sensor
3 COM_IN RJ45 connector Connects to the BBU or
upper-level device and
reports alarms to the
BBU.
4 COM_OUT RJ45 connector Connects to the BBU or
lower-level devices and
collects alarms from
lower-level devices.
5 COM_485 RJ45 connector Reserved
Indicators
Table 5-4 describes the indicators on the 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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