Product Overview
USB to RS485 Converter Cable based on CH340 + MAX485 solution. Supports stable USB to RS485 communication with automatic data direction control. Ideal for industrial control, data acquisition, PLC, and RS485 devices.

1. Product Parameters
Product Type: USB to RS485 Converter
Control Chip: CH340G + MAX485
USB Standard: USB 2.0, backward compatible
RS485 Standard: EIA/TIA-485
Baud Rate: 300–921600 bps (auto-detect)
Transmission Mode: Half-duplex RS485
Load Capability: Point-to-multipoint (up to 32 nodes)

Interface Protection: TVS surge protection, USB self-recovery fuse
Operating Systems: Windows 98/ME/2000/XP/7/8/10, Vista, Linux
Housing Color: White
2. Pin Function Description
Red (VCC): RS485 power output
White (B / D+): RS485 data line B
Green (A / D-): RS485 data line A
Black (GND): Signal ground
3. Common Questions & Answers (FAQ)
Q1: Does this converter support automatic direction control?
A1: Yes, data flow direction is automatically detected and controlled internally.

Q2: Can it be used with PLC or industrial equipment?
A2: Yes, it fully complies with RS485 standard and supports multi-drop networks.

Q3: Is driver installation required?
A3: CH340 drivers may be required on some systems; most Windows versions install automatically.

Q4: Does this output TTL serial signals?
A4: No, the output is RS485. TTL signals require internal modification.

Q5: What is the maximum supported baud rate?
A5: It supports baud rates from 300 up to 921600 bps with auto detection.