King-Meter KM529 - Connection Layout

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9. Connection layout
Following is the standard connector of display to connect the
controller.
Standard Connector Display-side terminal Terminal of plug-in wire
Line sequence table
Line sequence
Color
Function
1
Red（VCC）
Power +
2
Blue(K)
Switch
3
Black(GND)
Ground
4
Green(RX)
Received Data
5
Yellow(TX)
Transmitted Data
Some wire use the water-proof connector, users are not
able to see the inside color.