Dry Contact Card - Huawei UPS5000-E Series User Manual

UPS5000-E-(25 kVA-125 kVA)
User Manual (25 kVA power modules)
Table 2-2 Ports on the ECM
Table 2-3 Indicator description

2.4.2.3 Dry Contact Card

The dry contact card allows the UPS to detect and manage the switch status of the battery
system (including the external battery switch) and implement remote emergency power-off
(EPO).
Figure 2-11
Issue 06 (2020-01-10)
Silk Screen Description
PARALLEL The PARALLEL port transmits parallel signals. To connect multiple
UPSs in parallel, use parallel cables to connect the parallel ports on the
UPSs. N UPSs require N parallel cables so that two parallel cables are
connected to each UPS, which improves parallel connection reliability.
BSC 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.
Indicator Color
NORMAL Green
ALM Yellow
FAULT Red
shows control signal ports on the dry contact card.
Copyright © Huawei Technologies Co., Ltd.
Status Description
Steady on This ECM is the active ECM.
Blinking at 0.5 This ECM is the standby ECM and it is
Hz ready.
Off This ECM is not ready or the CPLD of this
ECM is being upgraded.
Blinking at 4 Hz The DSP of the ECM is being upgraded or
not configured.
Steady on The ECM has a minor alarm, but it does
not need to be replaced.
Off The ECM has no minor alarm or the DSP
of the ECM is being upgraded.
Steady on The ECM has a critical alarm.
Off The ECM has no critical alarm or the DSP
of the ECM is being upgraded.
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