---
lang: "en"
title: "USB TO 4CH RS485 (B): Isolated Industrial Converter from USB to 4 RS485 Channels (B), CH344L Chip, Multiple Protection Circuits, Support for Multiple Systems"
sku: "USB TO 4CH RS485 (B)"
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brand: "WAVESHARE"
image: "https://shop.marcomweb.it/storage/5233/conversions/Industrial-Isolated-USB-To-4-Ch-RS485-Converter-%28B%29-webp.webp"
end_of_life: "false"
---

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26545: Isolated Industrial Converter from USB to 4 RS485 Channels (B), CH344L Chip, Multiple Protection Circuits, Support for Multiple Systems

The USB TO 4CH RS485 (B) converter is an isolated industrial device that expands a single USB port into 4 independent RS485 channels, ideal for connecting and managing multiple industrial serial devices at the same time. Based on the original CH344L chip, it ensures fast, stable and reliable communication, with excellent cross-platform compatibility. Thanks to integrated digital and power isolation and multiple protection circuits, the device provides high safety and strong interference resistance even in demanding industrial environments. The rugged aluminum alloy enclosure supports both wall mounting and DIN-rail installation, making it versatile for different setups.

## Technical Specifications

- Uses the original CH344L chip: high-speed, stable and reliable communication, with improved compatibility.
- Supports USB to 4 isolated RS485 channels, convenient for expanding multiple industrial RS485 serial devices.
- Integrated power isolation (unibody): provides stable isolation voltage without requiring any additional power on the isolated side.
- Integrated digital isolation (unibody): supports signal isolation with greater reliability, strong immunity to interference, and reduced power consumption.
- Integrated TVS (Transient Voltage Suppressor) to effectively suppress overvoltages and transient voltage spikes in the circuits, offering protection against lightning and electrostatic discharge.
- Automatic reset fuses and integrated protection diodes to ensure a stable current and voltage output, prevent overcurrent and overvoltage, and improve resistance to electrical shocks.
- Integrated 120Ω RS485 termination resistor, flexibly enabled and switched via DIP switch.
- 10 external LEDs to indicate power, device configuration status, and signal status.
- Industrial-grade metal enclosure: robust and carefully designed, supports both wall mounting and DIN-rail installation, and is easy to install.

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