# 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.

## 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)