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Modbus RTU RS-485 network diagram showing PLC master and multiple slave devices on a two-wire bus
modbus rturs-485serial protocols

Modbus RTU Protocol Explained: Frames, Timing and Wiring

Modbus RTU over RS-485 is still the most common industrial serial protocol. Learn exactly how frames are built, how timing works, and how to wire it right the first time.

Jun 27, 2026 · 8 min read

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