USB to RS485 Converter Adapter CH340 2-Wire Serial Interface

USB to RS485 Converter Adapter CH340 2-Wire Serial Interface

🔁 USB to RS485 Converter Adapter CH340 2-Wire Serial Interface | AuscomTech

The USB to RS485 Converter Adapter is a compact, industrial-grade serial interface designed for stable and long-distance RS485 communication between a computer and RS485-enabled devices.

Powered by the reliable CH340 chipset, this adapter delivers strong anti-interference performance, plug-and-play USB operation, and broad OS compatibility. It is ideal for PLC systems, MODBUS networks, PTZ cameras, Arduino projects, and industrial data acquisition where dependable serial communication is essential.

⭐ Key Features

🧠 CH340 USB-to-Serial Chipset
Provides stable, high-reliability RS485 communication with wide driver support.

🔄 RS485 Half-Duplex (2-Wire)
Supports differential RS485 signalling for long-distance, noise-resistant data transfer.

🔌 True Plug & Play Operation
USB-powered design requires no external power supply.

📡 Long-Distance Communication
Supports transmission distances up to 1200 m (1.2 km) under suitable conditions.

💡 LED Status Indicators
Onboard LEDs display Power, TX, and RX activity for easy diagnostics.

⚡ Wide Baud Rate Support
Supports standard baud rates from 75 bps to 115,200 bps (higher rates supported by chipset).

🧱 Compact & Durable Housing
ABS enclosure designed for industrial, field, and workshop use.

📊 Technical Specifications

Model: USB to RS485 Converter Adapter
Chipset: CH340
USB Interface: USB Type-A
RS485 Interface: 2-wire, half-duplex (A / B)
Operating Voltage: 5V (USB powered)
Baud Rate Range: 75 bps – 115,200 bps (chipset supports higher rates)
Transmission Distance: Up to 1200 m
LED Indicators: Power / TX / RX
Operating Temperature: −40°C to +85°C
Material: ABS plastic
Dimensions: 61 × 16 × 13 mm
Colour: Black
Driver: CH341SER (required on some operating systems)

⚠️ Important Notes

• RS485 polarity (A/B) must be wired correctly
• Non-isolated design — isolation recommended for high-noise or high-voltage environments
• CH340 driver may need to be installed depending on operating system
• Not compatible with RS232 devices

🧩 Compatible With

• PLC systems
• MODBUS RTU devices
• Arduino (via UART)
• ESP32 / ESP8266
• STM32 microcontrollers
• PTZ cameras
• RS485 sensors, meters, and controllers

⚙️ Typical Applications

• PLC data communication
• MODBUS RTU networks
• Industrial automation systems
• Long-distance serial communication
• Sensor monitoring and logging
• Embedded system debugging

📦 Package Includes

• 1 × USB to RS485 Converter Adapter (CH340 Chipset)

 

 

Australian Stock – Fast Dispatch

All items are held in stock right here in Queensland, Australia. We do not use overseas drop-shipping or third-party dispatch — every order is packed and shipped directly from our Tingalpa facility.

Most orders are dispatched same business day if placed before our cut-off times, or next business day if purchased after hours, on weekends, or public holidays. Unlike some sellers who only pack orders every few days, we dispatch daily (Mon–Fri) to ensure you receive your order as quickly as possible.

We’re also constantly expanding our range and product offering. If you can’t find a specific item in our listings, please reach out to us — we can often source or order it in through our supplier network and add it to our store for you.

Product Variations

With most electronics, manufacturers make design changes that can occur as frequently as each production batch. This means components used, PCB colours, and even pin positions or connections may differ slightly from the images shown.

The images in our listings are for reference only, and all products supplied meet or exceed the stated specifications.

If you have something specific that you require — such as a particular layout, chip version, or pin configuration — please confirm with us prior to ordering.

 

Payment

All payments are handled securely through eBay Managed Payments. We don’t accept payment on pickup — please complete checkout on eBay before collection.

  • Credit & debit cards (Visa, Mastercard, American Express)
  • PayPal / PayPal Credit
  • Apple Pay & Google Pay (supported devices)
  • Afterpay (where available)
  • eBay Gift Cards & vouchers

Once payment is received, eBay notifies us automatically and your order is queued for dispatch.

Service & Warranty

We’re committed to great service and genuine local support. If you have any questions before or after purchase, please contact us via eBay Messages.

All products include a 12-month warranty (unless otherwise stated) covering manufacturing faults and component defects only. Not covered: misuse, incorrect wiring, reverse polarity, over-voltage, modification, physical damage, exposure to moisture, or other improper handling.

If you experience a problem

  • Contact us first before opening a return or case — most issues are resolved quickly with simple troubleshooting.
  • We may request details or photos to identify whether it’s a warranty fault or a setup issue.
  • Items returned that test as “no fault found” or are damaged through misuse may be returned to the buyer at their cost.

Returns

Hassle-free 30-day returns. If you change your mind or need to send something back, we’ve got you covered. Items must be unused and in original condition with all accessories.

How to return

  • Fast & Free (Untracked letter): Use the original envelope. Neatly cross out your name/address, write “RETURN TO SENDER” on the front, and drop it in any red Australia Post street box. Then send us a quick eBay message with your order number so we can watch for it.
  • Tracked parcels (Standard / Express): We’ll issue a pre-paid return label (Australia Post). Print & lodge, or use the provided QR code at the counter if available.

Faulty or DOA?

Please contact us first. We’ll troubleshoot quickly and, where a warranty fault is confirmed, we’ll arrange a pre-paid return or direct replacement under our 12-month warranty.

Processing your refund

Refunds are issued to the original payment method once the item arrives back and is checked (typically within 1–2 business days). Please include the order number inside the package to speed things up.

Notes: Items returned used, damaged, modified, or missing parts may be assessed as “no fault found” or misuse and returned to you at your cost. For time-critical replacements, message us—often we can ship an advance replacement once the return is in transit.

Support

We are an Australian-owned and operated business based in Tingalpa, Queensland. We pride ourselves on fast dispatch, honest listings, and reliable after-sales support.

DIY & Development Products

Many of our electronic modules and components are intended for DIY, maker, and development use. As such, they generally do not include printed instructions in the package. These items are designed for users who are learning, prototyping, or integrating them into custom projects.

Documentation & Resources

We can provide datasheets, pinout diagrams, and example code links upon request. Most of our products also have extensive online guides, tutorials, and community documentation available from open-source projects or the original manufacturers.

If you need drivers, libraries, or setup tools, let us know — we’ll direct you to the correct download links or repositories.

Technical Assistance

We’re always happy to help point you in the right direction and provide example code or configuration snippets. However, please note that we cannot write full programs or custom firmware for individual projects as part of normal support.

Custom Development & Contract Work

We do offer customisation, programming, and hardware development services for larger or ongoing projects under formal contract. These services typically require minimum order quantities and are quoted based on project scope. We don’t provide one-off coding or design services for hobby or single-unit use.

For larger integration, OEM, or automation projects, feel free to message us with your requirements — we can advise on feasibility and provide a quotation.

Australian Stock – Fast Dispatch

All items are stocked and shipped from Tingalpa, Queensland. We dispatch daily (Mon–Fri). Most orders placed before cut-off ship the same business day; otherwise next business day.

Fast & Free (Untracked)

Sent via the standard letter network through Australia Post. No tracking.

Important: If an Item Not Received case is opened on an untracked order, eBay will automatically refund the transaction. If you still want the item, please contact us first so we can arrange a replacement for genuine lost parcels.

Not suitable for Parcel Lockers. Orders over $80 AUD that include or select “Fast & Free” are automatically upgraded to our Standard Tracked service at no extra cost.

Standard & Express (Tracked)

Shipped via Australia Post. Standard includes full tracking and is required for Parcel Lockers. Express ships same business day if placed before 12:00 PM QLD.

Packaging & Handling

Fast & Free letter packaging is compact to keep costs low and offers limited impact protection. Delicate parts (e.g., pin headers) may arrive slightly bent and can typically be straightened easily. Select Standard Parcel Post (Tracked) for sturdier boxed packaging and tracking.

Local Pickup

By prior arrangement only (no shopfront). Pay via eBay checkout first. Pickup: Tingalpa, QLD. Hours: Mon–Fri, 9:00 AM–5:00 PM AEST (excl. public holidays). Same-day by request if available.

International Orders (Tracked)

Tracked services via Australia Post. Transit times are estimates; customs and local postal conditions can add delays.

Tariffs, duties & taxes: Many countries apply tariffs/VAT/GST/clearance fees. These are not included in the item price or postage and are the buyer’s responsibility. We declare goods accurately and cannot undervalue/mark as gifts.