UPS5000-A-500 kVA
User Manual (e-shelter)
2 Overview
Issue 02 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
21
(7) BSC port 2
(8) ECM 2 ready switch
(9) Indicators for ECM 2
(10) Dry contact card
(11) Dry contacts
(12) MDU port
(13) RS485 port
(14) Fast Ethernet (FE) port
(15) COM2 port
(16) COM1 port
(17) Battery temperature sensor
port
(18) Optional card subrack
cover
2.4.2 ECM
The control unit consists of two ECMs in active/standby mode. Each ECM provides one bus
synchronization controller (BSC) port and one parallel port, as shown in
Figure 2-10
ECM
Table 2-2
Ports on the ECM
Silk Screen
Description
PARALLEL
The PARALLEL port transmits parallel signals.
BSC
This port is used in a dual-bus system to balance output frequencies and
phases between UPS systems, ensuring that two buses can switch with
each other.
BSC cables are hot-swappable.
For a single UPS, the parallel cable is not needed.
Table 2-3
Indicator description
Indicator
Color
Status
Description
NORMAL
Green
Steady on
This ECM is the active ECM.
Blinking at 0.5
Hz
This ECM is the standby ECM and it is
ready.