PL2303HX USB to RS485 Converter Module for Win7/Linux/XP

Specification	Details
Chipset	PL2303HX (USB-to-Serial) + MAX485 (RS485)
Input	USB 2.0 / 1.1
Output	RS485 (A+, B-, GND)
Baud Rate	300 bps to 115,200 bps
Protection	TVS Surge Protection
Transmission Distance	Up to 1200 meters
Compatibility	Windows XP, Vista, 7, Linux, macOS

Price

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₹ 93.22

(Tax included)

Barcode: 1738336

Product Description

The PL2303HX adapter is a plug-and-play solution that creates a virtual COM port on your computer. It features a transparent blue casing that allows you to see the onboard power and data LEDs, which flash during active transmission. The output side typically uses a terminal block for secure wiring, making it easy to connect twisted-pair cables for industrial networking.

Key Features

No External Power Required: Draws all necessary power directly from the USB port, making it highly portable for field diagnostics.
Bi-directional Communication: Supports half-duplex RS485 communication, enabling both data transmission and reception on the same pair of wires.
Wide OS Support: Compatible with legacy systems like Windows XP and Win7, as well as various Linux distributions for embedded applications.
Onboard Indicators: Equipped with TXD and RXD LEDs to help technicians visually verify data flow without needing an oscilloscope.
Compact Design: The "thumb-drive" form factor allows it to be used in tight spaces without blocking adjacent USB ports.

Technical Details

Max Nodes: Supports up to 32 devices on a single RS485 bus.
Connector: USB Type-A (Male) to 2-pin/3-pin Terminal Block.

Prototyping and Engineering Tips from Robogears

Driver Installation: The PL2303HX is an older chipset. If you are using Windows 10 or 11, you may need to manually install an older driver version (v3.2.0.0) from the manufacturer's website to avoid the "Code 10" error in Device Manager.
Termination Resistor: For long cable runs (over 100 meters) or high baud rates, add a 120-ohm resistor between the A+ and B- terminals at both ends of the bus. This prevents signal reflections that can corrupt your data.
Grounding: While RS485 is a 2-wire differential system, connecting a common GND wire between the adapter and the remote device can help prevent ground loop interference in electrically "noisy" industrial environments.
Polarity Check: If your software cannot see the remote device, try swapping the A+ and B- wires. Different manufacturers sometimes label these pins differently (D+/D- or Non-inverting/Inverting).

Package Includes

1 x PL2303HX USB to RS485 Converter Adapter

Disclaimer

Ensure you check the driver compatibility for your specific operating system before purchase. This module is not recommended for high-voltage isolation applications.

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