FusionModule2000 Smart Modular Data Center
Product Description
5 Power Supply and Distribution System
Issue 06 (2020-05-21)
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.
The monitoring interface card provides external ports as well as monitoring and control
functions for the MDU. The ports include the ambient temperature and humidity sensor port,
FE port, battery temperature monitoring port, and network management port. MDU functions
include monitoring of the UPS, allowing users to set parameters, command delivery,
information reports, and UPS key information and parameters displayed on the LCD.
Figure 5-28
Monitoring interface card
The maximum voltage and current of ports DO_1 to DO_4 are 30 V DC, 1 A or 60 V DC, 0.5 A
respectively.
Table 5-6
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
COM
