UPS5000-E-(50 kVA-300 kVA)
User Manual (50 kVA Power Modules)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Figure 2-16 ECM
In a parallel system, the PARALLEL ports on ECMs are interconnected in the shape of a ring
using parallel cables. A hot swappable BSC is used in a dual-bus system to process the
communication information between two UPS systems. Table 2-2 describes the functions of
the ECM.
Table 2-2 Ports on the ECM
This port transmits parallel signals. To connect UPSs in
parallel, use a parallel cable to connect the parallel ports on
the ECMs of the UPSs in the shape of a ring. N UPSs
require N parallel cables so that at least two parallel cables
are connected to each UPS, which improves reliability.
The BSC port is used in a dual-bus system to synchronize
output frequencies and phases between UPS systems,
ensuring that two buses can switch with each other.
For a single UPS, the parallel cable is not needed.
Table 2-3 Indicator description
This ECM is the active ECM.
This ECM is the standby ECM and it is
ready.
This ECM is not ready or the CPLD of this
ECM is being upgraded.
The DSP of the ECM is being upgraded or
not configured.
The ECM has a minor alarm, but it does
not need to be replaced.
The ECM has no minor alarm or the DSP
of the ECM is being upgraded.
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