[Interface signal]：RS485/RS422/RS232
[Product size]：173x95x26.5mm
[Domain name resolution]：support, the server address can be manually configured
[Product weight]：360g±5g
[Installation method]： positioning hole installation
[Introduction]：NB124S is a common industrial-grade 2-way serial port server that supports DC power supply. It integrates the TCP/IP protocol stack inside, which can realize two-way transparent transmission of data from the 2-way serial port to the Ethernet port. The device has the function of ModBus gateway, supports Modbus TCP to RTU, and supports automatic polling. The product adopts industrial-grade standard design to ensure the stability of the equipment in harsh working environments, and the rich indicator light effects are used to feedback the different working states of the equipment.
| No. | Name | Function | Description |
| 1 | RS232-2 | Serial port 2-RS232 | Standard DB9 female head，2-TXD、3-RXD、5-GND |
| 2 | RS232-1 | Serial port 1-RS232 | Standard DB9 female head，2-TXD、3-RXD、5-GND |
| 3 | RS422-1-R+ | Serial port 1-RS422 -R+ | 3.81mm Phoenix terminal |
| 4 | RS422-1-R- | Serial port 1-RS422 -R- | 3.81mm Phoenix terminal |
| 5 | GND | Serial port 1 Ground | 3.81mm Phoenix terminal |
| 6 | RS422-1-T+/A | Serial port 1-RS422 -T+ Serial port 1-RS485 A | 3.81mm Phoenix terminal |
| 7 | RS422-1-T-B | Serial port 1-RS422 -T- Serial port 1-RS485 B | 3.81mm Phoenix terminal |
| 8 | RS422-2-R+ | Serial port 2-RS422 -R+ | 3.81mm Phoenix terminal |
| 9 | RS422-2-R- | Serial port 2-RS422 -R- | 3.81mm Phoenix terminal |
| 10 | GND | Seria2 port 1 Ground | 3.81mm Phoenix terminal |
| 11 | RS422-2-T+/A | Serial port 2-RS422 -T+ Serial port 2-RS485 A | 3.81mm Phoenix terminal |
| 12 | RS422-2-T-/B | Serial port 2-RS422 -T- Serial port 2-RS485 B | 3.81mm Phoenix terminal |
| 13 | - | DC 8-28 V Negative pole | DC 8-28 V，5.08mm Phoenix terminal； |
| 14 | + | DC 8-28 V Positive pol | DC 8-28 V，5.08mm Phoenix terminal； |
| 15 | DC-IN | DC power input | DC 8-28 V； OD 5.5mm，ID 2.0mm straight plug-in round hole； |
| 16 | Ethernet | Ethernet interface | Standard RJ45 Ethernet interface |
| 17 | Reload | factory reset button | After long pressing for 5s, NET led is always on for 5s, and the device restores to factory settings |