LG BECON PQCSZ250S0 Installation Manual page 10

INSTALLATION INSTRUCTION
10
In case of linkage installation of AC Ez
A
B
MAIN
Pl485
PCB
VCC
GND
BUSA
BUSB
A
B
MAIN
Pl485
PCB
VCC
GND
BUSA
BUSB
A
B
MAIN
PCB
VCC
GND
INTA
INTB
A
B
MAIN
PCB
VCC
GND
INTA
INTB
!
NOTE
AC Ez power should be inputted only one AC Ez from outdoor unit. It is possible to set the
Master/Slave setting and group number setting by entering the installation mode.
Central controller and outdoor unit wiring should be connected through BUS connection
(BUS topology).
00 01
IDU connection
Vcc GND BUSB
Central controller 1
10
IDU connection
Vcc GND BUSB BUSA
Central controller 1
00 01
IDU connection
Vcc GND INTB
Central controller 1
10
IDU connection
Vcc GND
Central controller 1
. . .
02 03 0E
BUSA
Master
Group Number : 0
. . .
11 12 13
Slave
Group Number : 1
. . .
02 03 0E
INTA
Master
Group Number : 0
. . .
11 12 13
INTB INTA
Slave
Group Number : 1
0F
1F
0F
1F