| 序号 | A | B | C | 序号 | A | B | C |
| 1 | 12V1 | LAN4_DA+ |
| 17 | LAN3_DC+ | 1PPS | LAN1_DC+ |
| 2 | 12V1 | LAN4_DA− |
| 18 | LAN3_DC− | 25PPS | LAN1_DC− |
| 3 | 12V1 | LAN4_DB+ |
| 19 | LAN3_DB− | RS422_RX2+ | LAN1_DB− |
| 4 | 12V1 | LAN4_DC+ |
| 20 | LAN3_DD+ | RS422_TX2+ | LAN1_DD+ |
| 5 | LAN2_DA+ | LAN4_DC− |
| 21 | LAN3_DD− | RS422_RX2− | LAN1_DD− |
| 6 | LAN2_DA− | LAN4_DB− |
| 22 | RS422_TX1+ | RS422_TX2− | Add_Device1 |
| 7 | LAN2_DB+ | LAN4_DD+ |
| 23 | RS422_TX1− | RS422_GND | Add_Device2 |
| 8 | LAN2_DC+ | LAN4_DD− |
| 24 | RS422_RX1+ | RS422_GND | Add_Device3 |
| 9 | LAN2_DC− | LAN5_DA+ |
| 25 | RS422_RX1− | Add_Slot1 | Add_Device4 |
| 10 | LAN2_DB− | LAN5_DA− |
| 26 | RS422_GND | Add_Slot2 | Add_Device5 |
| 11 | LAN2_DD+ | LAN5_DB+ |
| 27 | RS422_GND | Add_Slot3 | Add_Device6 |