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2.3.1 Wiring Method
(1) This product should connect to power supply wiring (adapter), communication line with air conditioner (H-NET),
communication line with computer for management (Modbus TCP)
If using RS-485 loop (Modbus RTU), need to connect with RS-485 special communication line.
If using USB for power supply, please use MINI USB communication line for power supply.
In addition, if connected to external equipment, also need to carry out construction of communication line (external
input and output) with external unit.
During wiring construction, ensure to cut off the main power supply.
(2) Wiring Method
, prepare on the spot
Power line
Wired remote control
Indoor unit
Outdoor unit
Centralized control computer
H-NET
Power line
Modbus adapter
3
Modbus TCP
4
1
Power adapter 12V
or MINI USB input
2
5
6
Modbus RTU
External input and output
Figure 2.6 Wiring Method
Table 2.1 Installation process
Sequence Wiring
type
Specifications
Wiring length
Cable specification
①
Power supply wiring
12VDC or MINI USB 5V
power supply
——
1.25
~
2mm
2
②
Grounding wire
——
——
1.25
~
2mm
2
③
Modbus TCP wring
IEEE 802.3 standard
Below 100m
Above LAN cable 5
class
④
H-NET wring
5VDC
Below 1000m
0.75
~
1mm
2
⑤
Modbus RTU wring
5VDC
Below 1000m
0.75
~
1mm
2
⑥
External input and
output wiring
Input: 5VDC
Output: 12VDC
Within 70m
0.5
~
1.25mm
2
※
For Modbus TCP wiring, use LAN wiring, Modbus adapter LAN port is RJ45.
※
When connecting to Modbus TCP wiring, insert LAN port of Modbus adapter at one end, connect to computer for
management or HUB at the other end.
※
Please use through LAN wiring.
Note
●
Power supply wiring, communication line (Modbus TCP, Modbus TRU, external input and output) require
distance above 150mm.
●
When using shielded wire, class D grounding work must be done.
2 Installation construction