LG 128 Expansion Kit Installation Manual page 11

Installation of AC Smart 128 Expansion Kit
4
. Connect the RS485 line between A on the rear panel of AC Smart and BUS_A of the expansion kit,
and then connect to B on the rear panel and BUS_B.
Wind 5 turns on a core.
1 2 3 4
Caution: RS485 communication cable connection
Because the polarity exists for the connection of RS485 communication cable, be
careful not to mix the connection of two cables.
The installer must wind the communication line 5 turns on the provided core as shown
above figure.
Installation Manual 11