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Latest Vutlan drivers (from August 2021) support Modbus RTU read and write functions for all monitoring systems. |
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Sensors are connected in a daisy chain connection.
120Ω resistor is used at the ends of the chain which is equal to the resistance of the cable.
A twisted pair cable is used for A(+) and B(-).
Up to 32 devices can be used.
Overall cable length is no more than 1000 meters.
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Activation and Configuration of Modbus interface
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After all Modbus devices have been connected to it, you need to activate it and configure:
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Accessories
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Some recommended readers Modbus configurations for tested sensors tested by Vutlan
Testing VT485m PCB using two Vutlan controllers
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