UPS5000-E-(350 kVA-800 kVA)
User Manual (50 kVA Power Modules)
2 Overview
Issue 05 (2018-01-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
38
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. Conversely, if the FE port is mistaken for the
RS485 port during cable connection, RS485 communication fails.
If MDU communication fails, the "Comm. failure" message is displayed on the LCD,
screen switching is disabled, the buzzer buzzes, and the fault indicator is red. Once the
fault is rectified, the LCD recovers, and the alarm is cleared.
Dry contact signals take effect after you set them. Disable unused dry contact signals on
the monitoring system.
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,
iBattery port, FE port, battery temperature monitoring port, and network management port.
The MDU monitors the UPS, allows users to set parameters, delivers commands, reports
information, and displays the UPS key information and parameters on the LCD.
Figure 2-26
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 2-7
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,
COM
