LG PAHCMR000 Installation Manual page 15

Electric specification of port
n RS485/SINGLE Communication port
Name Port
Module
RS485 CH1
Comm.
MULTI V
RS485 CH2
IDU Comm.
Single IDU
SINGLE N/SIG
Comm.
n NTC Thermistor
Name Port
Thermistor
NTC RI1/G
Room
Thermistor
NTC RI3/G
Pipe in
Thermistor
NTC RI4/G
Pipe out
RETURN AIR TEMPERATURE CONTROL (PAHCMR000)
Contents
DDC(Modbus)
2C x (1.0~1.5) mm
Comm.
MULTI V IDU Comm. 2C x (1.0~1.5) mm
Single IDU Comm. 2C x (1.0~1.5) mm
Contents
Room (Return) air
thermistor
Pipe in (Liquid)
thermistor
Pipe out (Gas)
thermistor
Electrical Spec.
Communication with
Max 500 m,
DDC or Main module of
2
PAHCMS000 model
(shield wire)
through Modbus protocol
Max 1 km,
Communication with
2
MULTI V Outdoor unit
(shield wire)
Max 75 m,
Communication with
2
Single Split Outdoor unit
(shield wire)
Electrical Spec.
Return air temperature
NTC 10 kΩ, 5 m
sensor
Inlet pipe (Liquid) Temp.
NTC 5 kΩ, 5 m
sensor
Outlet pipe (Gas) Temp.
NTC 5 kΩ, 5 m
sensor
15
Function
Function