LG BACnet Touch Installation & Owner's Manual page 21

AC Smart BACnet's RS485 connection
An AC Smart BACnet can have up to 128 indoor units. If there are many outdoor units to be
connected, connect them to a bus. If not, AC Smart BACnet may malfunction.
<Good example: RS485 BUS form connection>
NOTES
Maximum node numbers which can be connected to RS485 communication line.
Multi V
y
Maximum of 16 nodes can be connected to 1 RS485 line.
Multi/Single
y
Maximum of 32 nodes can be connected to 1 RS485 line.
ERV
y
Maximum of 32 nodes can be connected to 1 RS485 line.
<Bad example: RS485 STAR form connection>
13
PREPARATION