U-Match Series DC Inverter Service Manual
46
Figure 2-7-11
Note:
①
In order to realize the MODBUS interface function, the address mode of the unit must be set into
long-distance control address mode; you can not set it into centralized control address mode,
otherwise, this function can not be realized;
②
The unit can not be connected to MODBUS and centralized controller at the same time; only one
of them can be selected;
③
255 sets of unit in maximum can be connected in the same network; the unit addresses in the
same network must be different, otherwise, the unit control will be affected;
④
Perform wiring when the unit power is cut off.
7.2.4 Connect to interface of centralized controller
The indoor unit is with the interface of centralized controller. When centralized controller is
connected, centralized control of unit can be realized when the wired controller is not connected;
(1) Interface instruction:
1) The printing is COM-BMS2, COM-BMS3 and the interface type is B2B-XH-K3;
2) Electrical characteristic: none;
3) Working principle: centralized control the communication of indoor mainboard and realize
the unit control;
(2) Function instructions:
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