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5.10.4 Connecting the communication wiring
Do not connect the communication line when the power is on.
Connect the shielding nets at both ends of the shielded wire to the sheet metal "
Do not connect the power cable to the terminal of communication line, otherwise, the motherboard will be damaged.
It is forbidden to reverse the connection of the two communication ports (to up IDU) and (to down IDU) of the repeater.
On-site wiring must comply with the relevant regulations of the local Country/region and must be completed by
professionals.
The communication lines of the indoor and ODUs can only be led out and connected from the master ODU.
The ODU is often parallel type of multi modules, and the communication lines between the ODUs must be connected in
series.
When a single communication line is not long enough, the joint must be crimped or soldered, and the copper wire at the
joint shall not be exposed.
Before connecting the communication wiring, please select the appropriate communication mode according to the type of
indoor unit and refer to the following table.
Table 5.10 Communication mode
IDU and ODU type
All IDUs and ODUs are JR8 series
At least one IDU or ODU is not JR8 series
Table 5.11 Communication wiring material
Communication mode
RS-485 (P Q E) communication
RS-485 (P Q) communication
WARNING
CAUTION
Communication protocol
JR8 communication protocol
Non-JR8 communication protocol
Number of cores and
Type of wire
wire diameter (mm
PVC-sheathed
copper-core flexible
shielded cable
PVC-sheathed
copper-core flexible
shielded twisted pair
38
" of the electronic control box.
Optional communication mode
between IDU and ODU
RS-485 (P Q) communication
RS-485 (P Q E) communication
Total length of
)
2
communication line (m)
3х0.75
L≤1200
2х0.75
L≤1200
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