> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# CH343G USB TO RS232/485/TTL Interface Converter with Isolation

**Type:** Product page · **SKU:** WS-22547 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/ch343g-usb-to-rs232485ttl-interface-converter-with-isolation.html ([markdown](https://core-electronics.com.au/ch343g-usb-to-rs232485ttl-interface-converter-with-isolation.html.md))

CH343G USB TO RS232/485/TTL Interface Converter, Industrial Isolation...

## Pricing

- **Price:** $37.40 (inc GST) — $34.00 AUD, exc GST
- **Quantity discounts:** 10+ $32.64 (exc GST) · 25+ $31.62 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 3 today, and up to 300 more in 12–19 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=WS-22547:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

The device features onboard unibody power supply isolation, delivering a stable isolated voltage without requiring an additional power source. To protect against electrical disruptions, the device is equipped with a transient voltage suppressor (TVS) to effectively manage surges and spike voltages. It also incorporates a self-recovery fuse and protection diodes, which ensure stable current and voltage outputs while providing over-current and over-voltage protection, thereby enhancing shock resistance. The fully automatic transceiver circuit allows the USB port to communicate stably with different interfaces without interference.

## Specifications

 | PRODUCT TYPE | Industrial grade digital isolated converter |
|---|---|
| USB | Operating voltage | 5V |
| Connector | USB-B |
| Protection | 200mA self-recovery fuse, isolated output |
| RS232 | Connector | DB9 male |
| Protection | TVS diode, surge protection & ESD protection |
| Transmission mode | Point-to-point |
| Baud rate | CH343G: up to 600000 bps (not full band) |
| RS485 | Connector | Screw terminal |
| Pins | A+/B-/GND |
| Direction control | Hardware automatically discriminates and controls the direction of data transmission |
| Protection | 600W lightningproof and surge-suppress, 15KV ESD protection (reserved 120R balancing resistor solder pads |
| Transmission mode | Point-to-multipoints (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more) |
| Baud rate | CH343G: up to 2 Mbps (not full band) |
| TTL (UART) | Operating voltage | 3.3V / 5V |
| Connector | Screw terminal |
| Pins | TXD, RXD, GND, 5V |
| Protection | clamp protection diode, over-voltage/negative-voltage proof, shock proof |
| Transmission mode | Point-to-point |
| Baud rate | CH343G: up to 2 Mbps (not full band) |
| Indicators | PWR | Red power indicator, light up when there is USB connection and voltage is detected |
| TXD | Green TX indicator, light up when the USB port sends data |
| RXD | Blue RX indicator, light up when the device ports send data back |
| Operating environment | Temperature | -15? ~ 70? |
| Humidity | 5%RH ~ 95%RH |
| Operating system | Mac, Linux, Android, Windows 11 / 10 / 8.1 / 8 / 7 |

## Pinout

##  ![](https://core-electronics.com.au/attachments/localcontent/USB-TO-RS232-485-TTL-details-7_42494f188c7.jpg) 

## Dimensions

##  ![](https://core-electronics.com.au/attachments/localcontent/USB-TO-RS232-485-TTL-details-size_14976b8899b.jpg)

## Documents

- **Wiki**
 
## Shipping list

- 1 x OPTIONS USB Converter
- 1 x USB Cable ~1.2m

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/C/E/CE09121-1.jpg)