Midea MIH15GN18 Manual De Usuario E Instalacion página 55

System: The HyperLink communication line with a uniform power supply between IDU and ODU can reach a length
of up to 2000 meters, supporting any topology connection. The following figure shows a serial connection:
Power supply for IDU
Circuit breaker
Master ODU IDU 1#
CN10
CN23
M1 M2 M1 M2
L1
L1+La+Ln ≤ 2000m
For other connection methods (tree topology, star topology, ring topology), please refer to the technical manual or
consult technical personnel.
[ Caution ]
When HyperLink with a uniform power supply is available, a uniform power supply for IDUs is required. For details,
see "Power Cable Connection".
When HyperLink with a uniform power supply is available, there is no need to connect a repeater to the system.
C
P/Q communication
Single unit: Use a shielded cable for the P/Q communication and properly ground the shield layer. P and Q ports are
located at terminal block "CN6" of the main control board. There is no distinction between negative and
positive electrodes. Connect the shield layer to the sheet metal of the electric control box, as shown in
the following figure:
Distribution box
CN1
···
2-(n-2)# IDU
L N
La
Main control board
Connect to the ODU PQ
Distribution box
IDU (n-1)#
CN1
CN10
M1 M2 L
N
CN6
P Q
Electric control box sheet metal part
50
Installation
Communication wire
Power cable
IDU n#
CN1
CN10
M1 M2 L
Ln
N