UPS5000-A-500 kVA
User Manual (e-shelter)
2 Overview
Issue 02 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
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Figure 2-8
UPS structure
(1) Power units
(2) Control unit
(3) Power distribution unit cover
(4) Maintenance bypass switch
(5) Bypass unit
2.4 Control Unit
2.4.1 Overview
In a standard configuration, the control unit consists of two energy control modules (ECMs),
one dry contact card, and one monitoring interface card. The four cards are hot swappable.
One subrack is reserved above the dry contact card. A backfeed protection card or dry contact
extended card can be inserted into this subrack.
Figure 2-9
Signal panel on the control unit
(1) Ground terminal
(2) Parallel port 1
(3) BSC port 1
(4) ECM 1 ready
switch
(5) Indicators for ECM 1
(6) Parallel port 2