Midea MIH15GN18 Manual De Usuario E Instalacion página 57

[ Caution ]
When P/Q or P/Q/E communication is used, the IDUs need to be powered uniformly.
Either P/Q, P/Q/E communication or HyperLink communication can be selected. If it is required for IDUs to have
independent power supplies, then HyperLink communication must be selected.
Use only shielded cables for P/Q or P/Q/E communication. Otherwise, the IDU and ODU communication may be
affected.
A matching resistor needs to be added to the last IDU on the PQ (in the accessory bag of the ODU).
4. X1/X2 communication cable connection
The X1X2 communication line is mainly connected to the wired controller to achieve one controller per IDU and two
controllers per IDU. The total length of the X1X2 communication line can reach 200 meters. Please use shielded wires,
but the shield layer cannot be grounded. X1 and X2 ports are located at terminal block "CN6" of the main control board.
There is no distinction between negative and positive electrodes. For details, see the following figure:
Main control board
CN6
L1
L1 ≤ 200m, L2+L3 ≤ 200m.
[ Caution ]
Two wired controllers of the same model can be used to control one IDU at the same time. In this case, you need to set
one controller to be the master and the other to be the slave. For details, see the wired controller manual.
X1X2
One controller to one IDU
Main control board
X1X2
CN6
L2 L3
52
Installation
Two controllers to one IDU
(Master-slave wired controller
needs to be set. For details, see
the wired controller manual.)