Set up a value to input port of a remote I/O controller to reflect to the output port of the other one as they set to Modbus/TCP Slave and Modbus/TCP Master each.
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100% brand new High quality rotary switch No power required No additional software needed Easy to use and install Hot-swappable (no need to reboot
2Port RJ45 Gigabit Ethernet RJ45 Network Switch Splitter Selector Box 100M/1000M
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AVPro Edge AC-MXNET-SW24 24-Port Gigabit PoE+ AC-MXNET-SW24 B&H