50
①
D1D2 communication wiring connection (limited to outdoor unit and system configuration)
A
Achieving one-to-multiple and two-to-multiple functions of the indoor unit wired controller through
D1D2 communication (a maximum of 16 sets)
D1D2 communication is 485 communication. The one-to-more and two-to-more functions of the
indoor unit wired controller can be achieved through D1D2 communication, as shown in the figure
below:
L1+L2 ≤ 200m, L3+Ln ≤ 1200m
D1 D2
D1 D2
D1 D2
X1 X2
X1 X2
X1 X2
CN6
CN2
CN2
CN2
L3
Ln
L1
L2
Use shielded cables and earth the shield layer.
The indoor unit can realize the one-to-more and two-to-more functions.
(master-slave wired controller needs to be set)
Wired controller
Wired controller
Indoor unit 16#
Indoor unit 1#
Indoor unit 2#
···
Indoor unit 3-15#
Please use shielded wires, and the shield layer cannot be earthed.
CAUTION
When the indoor units in the same refrigerant system are V8 indoor units, D1D2 communication can
enable one-to-multiple and two-to-multiple functions of the indoor unit wired controller.
To enable two-to-multiple functions, wired controllers must be of the same model.
B
Achieving centralized control of the indoor unit through D1D2 communication
The D1D2 communication wiring can also be connected to the centralized controller to achieve
centralized control of the indoor unit, as shown in the figure below:
L1+L3+Ln ≤ 1200m
D1 D2
D1 D2
D1 D2
X Y
CN2
CN2
CN2
L3
Ln
L1
Use shielded cables and earth the shield layer.
Centralized controller
Indoor unit n#
Indoor unit 1#
Indoor unit 2#
···
3-(n-1)# Indoor unit
