Modbus RTU
Modbus modules
Controled over an RS485 connection the Modbust RTU protocol is simple, open, and easy to use.
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USB-RS485B£19.60 As low as £14.72Complete, self powered, USB to RS485 interface.
Perfect for Modbus-RTU.
Baud - any baud rate up to 250k
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RS485 bus - upto 128 devices on the bus
Power - fully powered from standard USB interface