LG PQCPA11A0E Installation & Owner's Manual page 35

Tip: Connecting the RS485 of the ACP
64 outdoor units at maximum can be connected to one port of the RS485 of the ACP and 256
indoor units at maximum can be connected to one ACP. When there are many outdoor units to
connect, connect the outdoor units suitably from LG-NET1 to LG-NET4 with the BUS form.
Otherwise, the ACP may cause the malfunction.
The following figure shows the example for separately connecting the LG-NET1 and the LG-NET2
with the BUS form.
1
DI
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
MENU/
17
SELECT
18
19
20
1
DO
2
3
4
ACP
TX TX
LG-NET 1
RX
TX
LG-NET 2
RX
TX
LG-NET 3
RX
TX
LG-NET 4
RX
RX
TX
FDD
RX
TX
Ext.
RX
ACT
Ethernet 1
LNK
ACT
Ethernet 2
LNK
TX
Console
RX
Run
Power
Simple central
controller
RX
TX
Multi V
PI485
Multi V
PI485
Multi V
PI485
Installation/Owner's Manual
2. Installing ACP
Multi V
PI485
Multi V
PI485
Multi V
PI485
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