-RTU
Connect the COM/FE port on the main control module of the last smart cooling product in each
group to the RS485 port on the host.
If the length of a network cable in the FE teamwork is greater than or equal to 100 m, use the
group-based ring networking mode.
1. Connecting units with odd numbers: Connect the FE_1 port of the unit with an odd number to
the FE_2 port of the unit with the next odd number.
2. Connecting units with even numbers: Connect the FE_2 port of the unit with an even number
to the FE_1 port of the next unit with an even number.
3. Connect FE_2 of No. 1 unit and FE_1 of No. 2 unit, and connect the remaining FE_1 and FE_2
of the last two units.
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