LG BECON PQCSZ250S0 Installation Manual page 8

INSTALLATION INSTRUCTION
8
Method to Connect cable
To supply power to the central controller, supply it from the terminal block DC 10V and GND ter-
minal of PI485 or the terminal block DC 12V and GND of outdoor unit.
AC Ez PI485
VCC 10V
GND GND
BUS-A BUS-A
BUS-B BUS-B
! CAUTION
• For supplying DC10V power from PI485, power supply is permitted up to 1 central con-
trollers per PI485. If power is supplied more than 1 AC Ez, failure may occur in operation
of the AC Ez.
• For expanding and connecting PI485 communication lines BUS_A, BUS_B up to 16 AC
Ezs can be connected.
• Use the 0.75 Square Shield wires for connection wires between PI485 and AC Ez wires.
• Length of whole connection wires should be less than 1km.
AC Ez
VCC
GND
BUS-A
BUS-B
PI485
Multi V
12V
GND
BUS-A
BUS-B
Multi V