LG PAHCMS000 Installation Manual page 39

AHU COMMUNICATIONS KIT INSTALLATION
Case 3: Multiple AHUs / Standalone or DDC by Modbus
Modbus
LG centralized
communication
controller
2)
line
or
DDC
(Modbus)
Outdoor
Unit
00
Modbus
communication
line
Outdoor
Unit
00
ODU communication line
Note :
1. Remote controllershouldbeconnected toPAHCMS000.
2. LG Central controller addressing for discharge air temp. controller should be set to the same address as the main module's address.
3. Address of Comm. module of PAHCMS000 (Central control address) must be set to '00'. The address for additional
PAHCMR000 must be set with an order increasing by 1. Also ODU address must be the same as the paired AHU controller.
4. All PAHCMR000 units need to be set as Master mode.
Discharge air
sensor
Module
communication line
Communication
Main
module
module
Master
001
02:00
Remote
Controller
1)
Discharge air
L N
sensor
Communication
Main
module
module
Master
002
02:00
Remote
Controller
1)
L N
Due to our policy of continuous product innovation, some specifications may change without notification.
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Discharge Air Temperature Controller
IDU communication line
Pipe in & out
Pipe in & out
sensor sensor
RA temp. RA temp.
controller controller
Master Master
02:01
Pipe in & out
Pipe in & out
sensor
sensor
RA temp. RA temp.
controller controller
Master Master
02:01
Remote controller connected to PAHCMR000 can only monitor status.
Pipe in & out
Pipe in & out
sensor
sensor
RA temp.
controller
Master
02:03
02:02
Power line
Pipe in & out
Pipe in & out
sensor
sensor
RA temp.
controller
Master
02:03
02:02
Discharge air temp. controller
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