Midea MC-SU60-RN1L Operation Manual page 32

4.3.2 Wiring
Main Unit control box
8 9
X Y E A
X
Wire controller
Input Voltage(A/B)
Wiring size
10 11 12
B
Y E A B
8.5VAC
0.75mm
28
Communication with
host computer, ModBus
protocol
2