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Pin | Definition | Description |
1 | Vcc | 12V±20% input voltage |
2 | GND | Input terminal grounded |
3 | RX | UART receive(UART output voltage 5V)(Modbus Protocol) |
4 | TX | UART transmit(UART output voltage 5V)(Modbus Protocol) |
5 | AD | AC、DC leakage alarming output( output voltage 5V)(Digital Signal) |
6 | AO | AC leakage alarming output( output voltage 5V)(Digital Signal) |
7 | DO | DC leakage alarming output(output voltage 5V)(Digital Signal) |



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