Welcome to my quick review of an inexpensive 2-channel 5V relay module controlled via RS485 bus utilizing Modbus RTU protocol. As claimed by some online sellers, this easy-to-get Modbus RTU 2-Channel ...
The modular Phoenix Contact HART Multiplexer offers Ethernet access to HART instrument data. It is available in both Basic (part number 2702321) and Universal Head station (part number 2702233) ...
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