LG BNU-BAC Installation & Owner's Manual page 21

• When using the simple central controller with the BACnet Gateway
1. Connect the BUS-A and the BUS-B of the PI485 to C and D of the simple central controller.
2. Set the rotary switch of the simple central controller to match with the group number of the indoor
unit to control.
3. Set the dip switch number 1 of the simple central controller to Off as slave and set the dip switch
number 2 to On as LGAP use mode.
Note: Check the LGAP label at the right side of the case of the simple central controller.
Only the product with the label can be connected to the BACnet Gateway at the same time.
Connect the VCC and the GND of the simple central controller from the P1485 or separately to
the adaptor. (See the manual for the simple central controller.)
1
DI
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
MENU/
17
SELECT
18
19
20
1
DO
2
3
4
2
Rotary switch
Ex)When controlling
the indoor Unit 10~1F,
setting the switch to 1.
TX
TX
LG-NET 1
RX
TX
LG-NET 2
RX
RX
TX
LG-NET 3
RX
TX
LG-NET 4
RX
TX
Ext 1
RX
TX
Shield line of 0.75 mm
Ext 2
RX
ACT
Ethernet 1
LNK
(RS485 communication line)
ACT
Ethernet 2
LNK
TX
Console
RX
Run
1
Power
CN-POWER
S2
S1
L
LED2
LED3
IC1P S5
S6
+
+
+
+
LED7
LED5
S10 S11
S9
+ +
+
LED9 LED11
LED10
S15
S14 +
+ +
LED13 LED14 LED15
PWB:6870A10001A
ASM:6711A20005E
S15
+
ON KSDO4H
LED17
L1 2 3 4
S19
ON KSDO4H
L1 2 3 4
DIP switch
Bus_B
Bus_A Bus_A Bus_A
2
CN-POWER
GND
CN-COM B
CN-COM A
S4
LED4
S3
+
LED8
TX1
Simple central controller
S12
LED12
S16
+
LED16
S18
3
Installation/Owner Manual 21
How to install
Multi V
ON KSDO4H
L1 2 3 4
PI485
Multi V
ON KSDO4H
L1 2 3 4
PI485