RS 485 Repeater/SplitterRS 485 Repeater/SplitterCommunication Converter RS-485 Ethernet Converter RS-485 to USB Converter RS 485 Repeater/Splitter RS-485 Extension 5 Port What is RS 485 Repeater/Splitter RS-485: 4 ports (half duplex), 1 port (full duplex) Output: Modbus RTU, Modbus TCP/IP Supply input voltage range: 10 to 28 VDC.