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External wiring diagram – LG PQNFB16A1 User Manual

Page 8

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External wiring diagram

8 Lonworks Gateway

LON protocol
BMS system

BNU-LW

RS485

RI485

Central controller address(0.0)

(0.1) . . . . . . . . . . . . (0.F)

Central controller address(1.0)

Central controller
address(2.0)

Central controller
address(2.4)

(2.1)

(2.2)

(2.3)

(2.5)

(2.6)

(2.7)

(1.1) . . . . . . . . . . . . (1.F)

Air conditioner

RI485

• When the address of the indoor unit of the air conditioner is duplicated with that of the ventilation

unit, it will not operate normally.

• Maximum of 64 units of the indoor unit (Air conditioner+Ventilation) can be connected to the BNU-

LW.

• It is recommended to connect 16 units of PI485 and maximum of d32 PI485 units to the BNU-LW.

• Ventilation products cannot be interfaced with the simple central controller.

External wiring diagram

How to set the address for the central controller of
the indoor unit connected to BNU-LW (Lonworks Gateway)