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【USB To RS485 Core Communication】 USB to RS485 converter cable using CH340G and MAX485 chipset; USB 2.0 Type‑A interface with backward compatibility; half‑duplex RS485 differential signaling; automatic data direction control without manual RTS handling; delivers stable serial communication for multi‑device RS485 networks
【Wide Baud Rate With Auto Detection】 Supports baud rates from 300 to 921600 bps; automatic serial rate detection adapts to host settings; maintains reliable timing across different data speeds; suitable for configuration, monitoring, and data exchange tasks using standard RS485 protocols
【Differential Signal With Noise Immunity】 RS485 A and B differential lines reduce common‑mode noise; supports point‑to‑multipoint bus connections; improves signal integrity over longer cable runs compared to single‑ended serial links; designed for consistent data transfer in electrically noisy environments
【Integrated Protection And Cable Design】 Built‑in TVS surge protection and USB self‑recovery fuse; helps protect the host USB port and connected devices from transient voltage events; 1.0 m white cable provides flexible placement while keeping wiring simple and organized
【Clear Wiring And System Compatibility】 Color‑coded wires for fast installation; red VCC, white B, green A, black GND; compatible with Windows 98, ME, 2000, XP, 7, 8, 10, Vista, and Linux with CH340 driver support; outputs RS485 signals only, not TTL without modification

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Product Overview
USB to RS485 Communication Cable using CH340 + MAX485 chipset. Provides stable USB‑to‑RS485 data transmission with automatic direction control. White cable, 1 meter length, suitable for industrial devices, PLCs, and RS485 networks.

1. Product Parameters
Product Type: USB to RS485 Converter Cable
Control Chip: CH340G + MAX485
USB Interface: USB 2.0 Type‑A, backward compatible
RS485 Standard: EIA/TIA‑485
Transmission Mode: Half‑duplex
Baud Rate: 300–921600 bps, auto detection
Network Capability: Point‑to‑multipoint RS485 bus
Cable Length: 1.0 m
Interface Protection: TVS surge protection, USB self‑recovery
Supported OS: Windows 98/ME/2000/XP/7/8/10, Vista, Linux
Cable 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 data direction switching?
A1: Yes, it uses automatic flow control to manage RS485 transmit and receive direction.

Q2: Is this cable compatible with PLC and industrial equipment?
A2: Yes, it fully complies with RS485 standard and supports multi‑node networks.

Q3: Are drivers required for use?
A3: CH340 drivers may be needed; most systems install them automatically.

Q4: Does this cable output TTL serial signals?
A4: No, the default output is RS485. TTL is only available by internal modification.

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

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3pcs USB to RS485 Serial Converter Cable, CH340 Chip, 300 to 921600 BPS, 1 m Length

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