Gree A Series - Hardware

54
not required and RS485 signal lines from BMS can be directly connected to the BMS port of
the control panel. When there are multiple units, signal lines from BMS are required to
connected to the BMS port through the patching board.
4.6.2.2 Communication Lines
Line Code
Description Type
L1
Category– 5 twisted pairs, two four-wire connectors, one
for the communication patching board, the other for the
unit.
S
L2
Category-5 twisted pairs, two four-wire connectors
S
L3
Category-5 twisted pairs, one four-wire connector for the
communication patching board, the other connector for
RS232–485 photoelectric converter.
O
R1
DB9 serial port line
S
S= Standard O= Optional P= Purchased by users
4.6.3 Hardware
4.6.3.1
Parts List
Name Model Code Remarks
Type
Optoelectronic
isolated repeater
RS485–W LN02200010
A repeater is required every
800m communication
distance or every 30
communication nodes
(control panels).
P
Optoelectronic
isolated
converter
GD01 LN02200020
It is required when there is
no remote monitoring kit but
RS232 communication is
used.
P
A Series Modular-type Air-cooled (Heat Pump) Chiller