| Pin Number | Wire Color | Signal Function | Notes | |------------|------------|----------------|-------| | 1 | Red | Battery+ (VCC) | Typically 24-48V | | 2 | Blue | RX (Receive data) | From display to controller | | 3 | Black | Ground (GND) | Common negative | | 4 | Green | TX (Transmit data) | From controller to display | | 5 | Yellow | Controller lock (power switch) | Some versions use for lights |