1. This is an RS232/485/422 device data collector/Internet of Things gateway specially designed for industrial environment applications. It combines serial server, Modbus gateway, MQTT gateway, RS485 to JSON and other functions. 2. Ethernet interface with RS232/485/422 and PoE function 3. The power interface with an outer diameter of 5.5mm and an inner diameter of 21mm is used to connect with the terminal type power supply 4. Rail type housing design, small size, convenient installation, cost-effective 5. It is applicable to data acquisition, Internet of Things gateway, security Internet of Things, intelligent instrument monitoring and other fields. Model: RS232/485/422 TO POE ETH (B) multiple interfaces+PoE network interface+electrical isolation version Product type: serial port server, Modbus gateway, MQTT gateway Basic function: realize two-way transparent transmission function from RS232/485/422 to Ethernet Communication interface: RS232 x 1; RS485 x 1; RS422 x 1; Internet port x one Power supply mode: DC 5.5 power interface, terminal DC 6~36V or PoE network interface Isolation protection: power isolation, signal isolation protection Communication interface: Ethernet: PoE network interface, supporting IEEE 802.3af standard. 10/100M adaptive RJ45 interface, 2 KV level surge protection Serial port: isolated RS232/485/422 Serial port parameters: Baud rate: 300~115200 bps Check bit: none, odd check, even check, mark, space Data bits: 5~9 bits Flow control: no flow control Software: Protocols: ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS Configuration mode: upper computer configuration, WEB browser, device management function library Communication mode: TCP/IP direct communication, virtual serial port Working mode: TCP server, TCP client (TCP s