| 1 | Ethernet | RJ45 network interface |
| 2 | Reload | Factory reset button, long press for 5 ~ 10s is effective |
| 3 | 1R- | The first serial port RS422 data receiving (B-) interface (3.81mm connecting terminal) |
| 4 | 1R+ | The first serial port RS422 data receiving (A +) (3.81mm connecting terminal) |
| 5 | GND1 | Ground reference for the first and second signal (3.81mm connecting terminal) |
| 6 | 1T-(1-485-B) | The first serial port RS485 data interface terminal B/ RS422 data transmission (B-) interface (3.81mm connecting terminal) |
| 7 | 1T+(1-485-A) | The first serial port RS485 data interface terminal A/ RS422 data transmission (A +) interface (3.81mm connecting terminal) |
| 8 | 2R- | The second serial port RS422 data receiving (B-) interface (3.81mm connecting terminal) |
| 9 | 2R+ | The second serial port RS422 data receiving (A +) (3.81mm connecting terminal) |
| 10 | GND1 | Reference ground for the 1st and 2nd signal(3.81mm connecting terminal) |
| 11 | 2T-(2-485-B) | The second serial port RS485 data interface terminal B/ RS422 data transmission (B-) interface (3.81mmconnecting terminal) |
| 12 | 2T+(2-485-A) | The second serial port RS485 data interface terminal A/ RS422 data transmission (A +) interface (3.81mmconnecting terminal) |
| 13 | 2-RS232 | The second RS232 data interface (network port type connector) |
| 14 | 1-RS232 | The first RS232 data interface (network port type connector) |
| 15 | PE | Ground screw post connected to the earth |
| 16 | 3-RS232 | The third RS232 data interface (network port type connector) |
| 17 | 4-RS232 | The fourth RS232 data interface (network port type connector) | |
| 18 | 4T+(4-485-A) | The fourth serial port RS485 data interface terminal A/ RS422 data transmission (A +) interface (3.81mm connecting terminal |
| 19 | 4T-(4-485-B) | The fourth serial port RS485 data interface terminal B/ RS422 data transmission (B-) interface (3.81mm connecting terminal) |
| 20 | GND2 | The third and fourth signal reference ground (3.81mm connecting terminal) |
| 21 | 4R+ | The fourth serial port RS422 data receiving (A +) (3.81mm connecting terminal) |
| 22 | 4R- | The fourth serial port RS422 data receiving (B-) interface (3.81mm connecting terminal) |
| 23 | 3T+(3-485-A) | The third serial port RS485 data interface terminal A/ RS422 data transmission (A +) interface (3.81mm connecting terminal) |
| 24 | 3T-(3-485-B) | The third serial port RS485 data interface terminal B/ RS422 data transmission (B-) interface (3.81mm connecting terminal) |
| 25 | GND2 | The the third and fourth signal reference ground (3.81mm connecting terminal) |
| 26 | 3R+ | The third serial port RS422 data receiving (A +) (3.81mm connecting terminal) |
| 27 | 3R- | The third serial port RS422 data receiving (B-) interface (3.81mm connecting terminal) |
| 28 | PE | Connect to the earth (3.81mm connecting terminal) |
| 29 | PE | Connect to the earth (3.81mm connecting terminal) |
| 30 | DC-IN(-) | Power terminal ground (3.81mm connecting terminal) |
| 31 | DC-IN(+) | Positive terminal of power connection terminal, can not supply power with power socket at the same time (3.81mm connecting terminal) |
| 32 | DC-IN | Power socket, cannot be powered at the same time as the power terminal |