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Caution: Connecting the RS485 communication cable
Because the connection of the RS485 communication cable has a polarity, be careful
that the connection of two cables is not changed.
ACP
2-20
2. Installing ACP
After fixing the ACP at the installation place, the RS485 cable connecting the PI485 to the ACP.
Connect the RS485 cable to the ACP as follows:
1. The end of the RS485 cable connecting to the BUS_A of the PI485 of the connector possible to be
connected to the ACP to the TX. Next, connect the end of the RS485 cable connecting to the
BUS_B of the PI485 to the RX.
2. The RS485 cable connecting to the PI485 to the LG-NET port (RS485 port) of the ACP. Connect
the connector connecting the RS485 cable to one of the ports LG-NET1~LG-NET4. The number of
LG-NET ports is 1~4 and it is possible to connect to any of them to use.
Connecting RS485 cable to ACP
RS485 - TX
RS485 - RX
LG
-N
E
T 1
M
E
N
U
/
S
E
LE
C
T
TX
RX
LG
-N
E
T
2
TX
RX
L
G
-N
E
T
3
TX
RX
LG
-N
E
T
4
TX
RX
E
thern
et
1
A
C
T
L
N
K
E
thernet
2
A
C
T
LN
K
C
on
sole
R
u
n
P
ow
er
TX
R
X
FD
D
TX
RX
E
xt
.
TX
R
X
DI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
D
O
1
2
3
4
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