LG AC Smart Premium PQCSW421E0A - AC Smart Premiums RS485 Connection

14
ENGLISH
Preparation
Notes
y
The maximum allowed communication distance guaranteed by LG Electronics is 1,000m.
It means that the distance between AC Smart Premium and the farthest device should not
exceed 1,000m. It is recommended that the communication cable use 0.75mm square or
more.
y
For indoor units, ERV, DI/DOs, DOKITs, AWHPs, and AHUs, you cannot allocate identical
addresses among devices of the same type. Allocate different addresses for devices of the
same type. (the indoor unit and DOKT cannot use the same address.)
AC Smart Premium's RS485 connection
An AC Smart Premium 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 Premium may malfunction.
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Notes
Maximum node numbers which can be connected to RS485 communication line.
y
Multi V
Maximum of 16 nodes can be connected to 1 RS485 line.
y
Multi/Single
Maximum of 32 nodes can be connected to 1 RS485 line.
y
ERV
Maximum of 32 nodes can be connected to 1 RS485 line.