Huawei NetCol8000-E220 Series Quick Manual page 15

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In CAN networking and grouping, connect the COM/FE port on the last smart cooling product in
each monitoring group to the monitoring device. After powering on the device, set the "RS485
monitoring grouping" of the last smart cooling product in each monitoring group to "Enable".
Setting path: Settings > Comm Settings > Modbus Settings.
FE Monitoring Network Cable (SNMP/Modbus-TCP Protocol)
Connect one end of the monitoring network cable (standard network cable) to the FE_1 port or
FE_2 on the main control module, and connect the other end to the monitoring device.
This wiring method applies to the smart module scenarios or other scenarios with LAN switches
regardless of teamwork networking.
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