Figure 2-4 Appearance of the front panel of the PIU
Indicators
The following indicator is present on the front panel of the PIU.
PWR, green, which indicates the power supply status. When PWR is on and green, it indicates
that power is accessed.
For details on indications of indicators, see 11 Indicators.
Interfaces
The PIU accesses one power supply. Table 2-2 lists the types of the interfaces on the PIU and
their respective usage. For cable corresponding to the interfaces, see 9.1 Power Supply Cables
and Grounding Cables.
Table 2-2 Types and usage of the interfaces on the PIU
Interface on the Front
Panel
Usage
NEG(-) -48 V power input interface
RTN(+) BGND power input interface
Label
Operation warning label: indicates the following precaution, which should be taken for removal
or insertion of the PIU board.
ATN 950B Multi-service Access Equipment
Hardware Description 2 Power Supply System
Issue 03 (2012-07-23) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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