# Industrial Isolated USB To 4-Ch RS485 Converter (B)

**Type:** Product page · **SKU:** WS-26545 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/industrial-usb-to-rs485-4-channel-isolated-converter.html ([markdown](https://core-electronics.com.au/industrial-usb-to-rs485-4-channel-isolated-converter.html.md))

USB-to-RS485 converter with four isolated channels and built-in surge and ESD protection, for stable multi-OS communication in an aluminium alloy case.

## Pricing

- **Price:** $40.10 (inc GST) — $36.45 AUD, exc GST
- **Quantity discounts:** 10+ $35.00 (exc GST) · 25+ $33.90 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 31.

## Description

Expand your PC’s serial communications with a robust, quad-channel interface. The **Industrial Isolated USB To 4-Ch RS485 Converter (B)** delivers reliable, galvanically isolated RS485 links for Modbus networks, sensor arrays and motor control.

Featuring the high-performance CH344L USB controller, four independent isolated channels and full surge protection, it’s ideal for industrial automation, data logging and multi-node networks over distances up to 1.2 km.

### Specifications

- **USB Interface:** USB-B connector, 5 V bus-powered, 500 mA resettable fuse, CH344L chip
- **RS485 Channels:** 4× isolated screw-terminal ports, hardware auto-direction control
- **Baud Rate:** 1 200 – 460 800 bps
- **Isolation:** Unibody power and digital isolation, no external PSU required
- **Surge & ESD Protection:** Onboard TVS, self-recovery fuse, protection diodes, 600 W surge, 15 kV ESD
- **Termination:** 120 Ω resistors per channel, DIP-switch enable/disable
- **Indicators:** PWR (USB power), ACT (driver status), TXD/RXD per channel
- **Transmission Distance:** Up to 1.2 km on RS485; ~5 m on USB
- **Operating Conditions:** –40 °C to 85 °C, 5 %–95 % RH
- **OS Support:** Windows 7/8/8.1/10/11, macOS, Linux, Android
- **Enclosure:** Aluminium alloy case; wall-mount & DIN-rail support
 
### How to Use

1. Mount the converter using the included rail-mount buckle or wall brackets.
2. Connect a USB Type A–Type B cable between your PC’s USB port and the converter’s USB-B socket.
3. Wire your RS485 devices to the four screw terminals; set 120 Ω termination switches on end-of-line nodes.
4. Install the CH344L driver on Windows (plug-and-play on macOS/Linux/Android); verify ACT LED lights green.
5. Power is drawn from USB—no extra supply needed; PWR LED confirms bus voltage.
 
### Compatibility

- Windows 7, 8, 8.1, 10 and 11
- macOS and mainstream Linux distributions
- Android devices with USB‐OTG support
- Industrial RS485 devices: sensors, PLCs, motor drives
- Modbus RTU networks (point-to-multipoint, up to 32 nodes)
 
### Additional Resources

- Waveshare USB To 4-Ch RS485 (B) Wiki
 
### What’s Included

- Industrial Isolated USB To 4-Ch RS485 Converter (B) × 1
- Rail-mount buckle × 1
- USB Type A to Type B cable (~1.2 m) × 1
- Screwdriver × 1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/W/S/WS-26545-3.jpg)