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The Modbus RTU communication protocol

2012-04-18View Original

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Is the Modbus RTU communication two-wire or four-wire? 1111111111111111111
Reply #22012-04-18
Modbus RTU is just a communication protocol; the specific interfaces include 232, 485, and 422. . . . Generally, it’s either 232 or 485. The 485 version usually has 2 wires, but there are also versions with 4 wires. You can send me the specifications of this device, and I can help you take a look at them
Reply #32012-04-18
It’s 485, which is used for communication between the terminal and the flow meter. Does the 2nd line also require a separate power supply for the flow meter?

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Translated at 2026-07-25 18:09:21

Original: https://bbs.hcbbs.com/thread-990241-1-1.html

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