FusionModule2000 Smart Modular Data Center
Product Description
5 Power Supply and Distribution System
Copyright © Huawei Technologies Co., Ltd.
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.
Provides FE, RS485, I2C, and CAN signals.
Battery
temperature sensor
port
Connects to an indoor battery temperature sensor.
Southbound
communications
port 1
Supported protocol: Modbus-RTU.
Connects to an ambient temperature and
humidity sensor over two wires.
Southbound
communications
port 2
Supported protocol: Modbus-RTU.
Connects to a southbound device.
Supported protocols: Modbus-TCP, HTTPS, and
SNMP.
Connects to the network port on a PC.
Northbound
communications
port
Supported protocol: Modbus-RTU.
Connects to a northbound network management
device over two wires.
Signal cables must be double-insulated twisted cables. If the cable length is 25–50 m, the
cross-sectional area must be 0.5–1.5 mm
2
.
RS485 cables and FE cables must be shielded cables.
Figure 5-29 and Figure 5-30 are recommended wiring methods for DO ports.
Figure 5-29 Wiring method 1