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System general information
1. Realizing group control function with the central controller
A monitor is connected with an air conditioner through A+, A- of the 4-wire screw
terminals on the interface for air conditioner, meanwhile the monitor dial switch
shall be set as single unit working mode and the address unit number shall be set
according to the planed scheme, see "Setting of the Dial Switch" for detailed setting
and corresponding addresses. For realizing group control function through the
central controller, the system still needs to connect the monitors. Each monitor shall
be connected with the twin twisted shielded communicating bus through the two-
wire screw terminals (A, B) on the RS-485 interface. For the communicating bus, it
is required to be shield grounded and the resistances on two sides shall be matched.
View of the monitor
interface
Power cord
Power on/off
Indoor unit
Outdoor unit
2.Realizing double unit switch-over group control function with the central
controller
A monitor is connected with two air conditioners with the same model through the
4-wire screw terminals on the interface for air conditioner, meanwhile the monitor
dial switch shall be set as double unit switch-over working mode with the default
switch-over time of 24 hours, and the address unit number shall be set according to
the planed scheme, see Setting of the Dial Switch for detailed setting and corre-
sponding addresses. For realizing double unit switch-over group control function
through the central controller, the system still needs to connect the monitors. Each
monitor shall be connected with the twin twisted shielded communicating bus
through the two-wire screw terminals (A, B) on the RS-485 interface. For the comm-
unicating bus, it is required to be shield grounded and the resistances on two sides
shall be matched.
A RS-485 B
Rear view of the
central controller
(F i g. 1)
(F i g. 2)
3
RS-485 bus Upper A Lower B
RS-485 bus Upper A Lower B
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