| No. | Name | Function | Description |
|---|---|---|---|
| 1 | Mode | Mode switch button | Working mode switching control |
| 2 | ANT | RF interface | SMA-K，External thread inner hole |
| 3 | DC | Power supply | DC power input port, pressure line port |
| 4 | RS485 | RS485 interface | Standard RS-485 interface |
| 5 | PWR | Power indicator | Lights up when the power is on |
| 6 | TXD | Sending indicator | Flashes when sending data |
| 7 | RXD | Receiving indicator | Flashes when receiving data |
| 8 | MO | Mode indicator | Working mode indicator |
| 9 | M1 | Mode indicator | Working mode indicator |