UPS5000-A-400 kVA
User Manual (50 kVA, PF=0.9)
2 Overview
Issue 03 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
22
2.3.3 Control Unit
2.3.3.1 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 2-11
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
(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
2.3.3.2 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 2-12
ECM