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98_ Air conditioning system
CNU (I-Gateway) / PI485
CNU (I-Gateway)
PQNFG14B0
Features
• CNU converts the ethernet protocol into RS 485 protocol and vice versa.
• Used with deluxe and P/C based central controllers.
•
Part description
Adaptor connection
DC 9V (supplied)
Without hub
Cross cable
Direct cable
Direct cable
With hub
RJ45 connector
Connected with the HUB
Deluxe central controller
PI485 connection
BUS_A : PI485 A terminal[+]
BUS_B : PI485 B terminal[-]
AC/DC adaptor
•
Wiring diagram
PI485
PMNFP14A1PMNFP14A0
•
Wiring diagram
Features
PI485 converts the protocol of air-conditioner to the 485
protocol for central controller.
• Device for simple/deluxe/PC controllers.
• Supports communication wires length flexibility up to 1km.
• Different types of PCB for different products.
-Option select (LGAP,CAC,RAC)
-LED display (Communication state)
-Four different types
• Available Max. 16 Indoor units : PMNFP14A0
• Available Max. 48 Indoor units : PMNFP14A1
outdoor PCB
A B E F C D VCC GND
CN_central
BUS_A
BUS_B
BUS_A
BUS_B
Multi outdoor terminal block
61799 LG Multi V Catalogue 9/5/07 9:18 am Page 98