
UPS5000-E-(25 kVA-75 kVA)-BF
User Manual
2 Overview
Issue 07 (2019-12-13)
Copyright © Huawei Technologies Co., Ltd.
35
The FE port resembles the RS485 port. Follow the silk screen when connecting
communications cables as, if the RS485 port is mistaken for the FE port during cable
connection, the WebUI cannot be connected and MDU communication fails. Conversely, if
the FE port is mistaken for the RS485 port during cable connection, RS485
communication fails.
Only once being set will dry contact signals take effect. Set unused dry contact signals to
the unused state on the LCD.
In a parallel system, ensure that used dry contacts properly connect to each UPS.
Figure 2-23
Monitoring interface card
DO_1 to DO_4 meet the maximum voltage and current requirements of 30 V DC/1 A or 60 V DC/0.5 A.
Table 2-8
Ports on the monitoring interface card
Port
Silk
Screen
Description
DO_1
NO
DO_1 is used to output alarms and indicates critical alarms by
default. It can be set to indicate minor alarms, bypass mode,
battery mode, or low battery voltage.
COM
DO_2
NO
DO_2 is used to output alarms and indicates minor alarms by
default. It can be set to indicate critical alarms, bypass mode,
battery mode, or low battery voltage.
COM
DO_3
NO
DO_3 is used to output alarms and indicates bypass mode by
default. It can be set to indicate critical alarms, minor alarms,
battery mode, or low battery voltage.
COM
DO_4
NO
DO_4 is used to output alarms and indicates battery mode by
default. It can be set to indicate critical alarms, minor alarms,
bypass mode, or low battery voltage.
COM
DB26
MDU
Provides FE, RS485, I2C, and CAN signals.
Battery
temperature
B_TEMP
Connects to an indoor battery temperature sensor.