4
The black terminal of the controller communication line is connected with the black
harness terminal at the lower outgoing line port of the unit� The other end of the controller
communication line is pressed on the wiring base of the controller, and the corresponding
relationship is red~+12V, black~GND, green~A2 and white~B2�
Connection terminal between controller communication line and IDU:
The Split IDU
Controller
All of the power supply and communication 485 cables between each module and terminal
module to the controller are double core shielded twisted-pair cable. Specic wiring as the
table below:
Controller
12V- black
12V+ red
Controller Installation
The communication line is connected with the controller
The length of signal line Wiring dimension
≤100m 0�75mm
2
×4
Fix the screw through the bracket on the 86 cassettes and connect the connection� The red
connects to the +12V and black to GND, the green connects to A2, and the white connects
to B2. Please pay attention to the line order. Then the controller is xed down.
Notes:
1� B1 and A1 are unavailable�
2� B2 and A2 for 485 interface, access to split unit's 485 B and A, paying attention to line
order�
3� ARALM1 and ALARM2 factory default is connected, if not be connected, then the main
interface of the controller will display alarm information, and all indoor units will be turned o.
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