42
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 “ ” of the electronic control box.
Do not connect the power cable to the terminal of the communication line, otherwise, the motherboard will be damaged.
Do not connect a system with both HyperLink (M1 M2) communication lines and PQ communication lines.
It is forbidden to reverse the connection of the two communication ports (to up IDU) and (to down IDU) of the repeater.
WARNING
5.10.4 Connecting the communication wiring
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 a parallel type of multi module, and the communication lines between the ODUs must be connected
in a 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.
CAUTION
Before connecting the communication wiring, please select the appropriate communication mode according to the type of
indoor unit and refer to the following table.
For the system, the EMI effect of the communication line M1M2 (or PQE) can be improved by adding a magnetic ring.
The installation is shown in the figure below. The magnetic ring needs to be fixed with the communication line (it can be
wound for two turns), and placed in the electric control box and secured with a wire clamp.
NOTE
Figure 5.43
Magnetic ring
Wire clamp
To Next Page