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Waveshare Industrial Isolated USB to 4-Channel RS485 Converter (B)– CH344L Chip & Multi-Protection
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The Waveshare Industrial Isolated USB to 4-Channel RS485 Converter (B) is an industrial-grade USB to RS485 converter designed to connect and communicate with multiple RS485 serial devices through a single USB interface. Powered by the CH344L chip, it provides stable communication across 4 isolated RS485 channels with a baud rate range of 1200bps to 460800bps.
The converter uses a 5V USB-B interface and provides hardware automatic direction control for convenient data transmission. Its isolated design combines power isolation and digital signal isolation to improve reliability and reduce interference, while built-in 600W lightning/surge protection, 15KV ESD protection, a 500mA resettable fuse, and protection diodes provide added protection against electrical faults.
The RS485 interface supports point-to-multipoint communication with up to 32 nodes, while the transmission distance can reach approximately 1.2km at low baud rates. A built-in 120Ω termination resistor can be enabled or disabled using the DIP switch.
With an industrial aluminium alloy enclosure, 10 LED indicators, and wall-mount or rail-mount support, this multi-channel RS485 converter is well suited for industrial automation, equipment monitoring, Modbus communication, and other applications requiring reliable multi-device serial communication.
| Specification | Details |
|---|---|
| Product Type | Industrial Isolated USB to RS485 Converter |
| Host Port | USB |
| Device Port | RS485 |
| Baud Rate | 1200bps ~ 460800bps |
| USB Operating Voltage | 5V |
| USB Connector | USB-B |
| USB Protection | 500mA Resettable Fuse, Output Isolation |
| RS485 Connector | Screw Terminal |
| Direction Control | Hardware Automatic Control |
| RS485 Protection | 600W Lightning & Surge Protection, 15KV ESD Protection |
| Matching Resistor | Onboard 120Ω Matching Resistor |
| Transmission Mode | Point-to-Multipoint |
| Maximum Nodes | Up to 32 Nodes |
| Recommended Repeater Use | For 16 Nodes or More |
| PWR Indicator | Lights up when the USB is connected and voltage is detected |
| ACT Indicator | Green light when the driver is detected |
| RXD Indicator | Lights up when the device port sends data back |
| TXD Indicator | Lights up when the USB port is sending data |
| Operating Temperature | -40°C ~ 85°C |
| Operating Humidity | 5%RH ~ 95%RH |
| Operating Systems | Windows 7/8/8.1/10/11, Mac, Linux, Android |
This product comes with a 1-year manufacturer warranty from the date of purchase, covering manufacturing defects only.
The product shows signs of physical damage, mishandling, exposure to water/moisture, fire, natural calamities, unauthorized repairs, improper storage near heat or direct sunlight, or alteration in any way.
Foam-protected with USB cable included. Delivery arrived early. Website listed plug-and-play OS versions. Detected immediately on Raspberry Pi OS. Customer support confirmed device ID consistency. Technical guidance covered udev rule setup for persistent naming. Simplifies deployment in headless Linux systems—highly practical design.
Sealed anti-static bag with rigid backing. Delivery arrived intact. Website confirmed genuine WCH chip usage. Driver installs without unsigned warnings on Win10. Customer interaction felt technically sound. Technical support shared FIFO buffer size details. Low latency and high throughput—matches FTDI performance at lower cost.
Box included magnified pinout card. Delivery was express. Website hosted 3D model for enclosure planning. **** terminals are clearly marked and color-coded. Customer service verified max baud rate per channel. Technical team explained auto-bias circuit function. Easy to wire correctly on first attempt—reduces commissioning time significantly.
Box contained optional DIN clip accessory. Delivery was prompt. Website showed mounting dimensions clearly. Clip snaps on securely for panel integration. Customer service confirmed vibration resistance. Technical team shared torque specs for terminal screws. Flexible installation meets both bench and industrial cabinet needs—thoughtful inclusion.
Each channel separated by foam dividers in box. Delivery took four days. Website provided independent channel wiring diagram. All four ports operate simultaneously without crosstalk. Customer service resolved baud rate question quickly. Technical guidance covered termination resistor best practices. Ideal for building management systems with distributed nodes.
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It is Amazing and great item in this price
Veri usefull and cheap price from other shopping site, I use this module many project. Thank you robocraze
I like this motor
Excellent
good product
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