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Homemade USB to RS485 debugger

Overview

Function: Used for host computer monitoring and debugging of industrial control equipment and instruments based on the RS485 Modbus protocol. Principle: The CH340 chip converts USB signals to TTL signals, and then the MAX485 chip converts them to differential signals. Features: Low cost. Suitable for various computer-based serial port assistants. ESD protection. Overcurrent protection. Automatic transceiver switching. Includes a 120R terminating resistor switch. Includes communication indicator lights.

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Update:2026-03-26 17:30:44

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