4 Ports RS232 / RS485 serial to Ethernet 4 Port Serial DB9 Server RJ45 Ethernet Converter
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4 Ports Serial Server RS232 RS485 RS422 go to TCP/IP Ethernet. Support MQTT, Modbus TCP/UDP](http://ae-pic-a1.aliexpress-media.com/kf/Sbb03c513abb648c4a41863af0df189cdB.jpg)
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4 Ports Serial Server RS232 RS485 RS422 go to TCP/IP Ethernet. Support MQTT, Modbus TCP/UDP
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4 Ports Serial Server RS232 RS485 RS422 go to TCP/IP Ethernet. Support MQTT, Modbus TCP/UDP