Dual ETH Mini-Computer For Raspberry Pi Compute Module 4 (NOT Included), Gigabit Ethernet, 4CH Isolated RS485, USB2.0 (CM4-ETH-RS485-BASE-B) is an expansion board that can be used with Raspberry Pi Compute Module 4. It supports 7-36V DC power supply and 5V DC power supply via Type-C interface. The board features four isolated RS485 interfaces, 100M + 1000M dual network ports, HDMI interface, two CSI interfaces, and two USB interfaces, among other functionalities.
Note: Raspberry Pi Compute Module 4 is not included.
Features:
- Cooling Fan Included
- Precise Cut-Out With Clear Label
- Dual ETH Quad RS485 Computer Based On CM4
- Wall Mount Holes On Two Sides, Handy For Mounting
- Suitable For Raspberry Pi Applications Requiring Multi-Channel RS485 Communication
- Real-time clock with battery socket and ability to wake Compute Module 4
Useful Link:
Specifications:
- CM4 socket: suitable for all variants of Compute Module 4
- Networking: Gigabit Ethernet RJ45 connector, 100M Ethernet RJ45 connector
- USB: USB 2.0 Type A
- Connector: Isolated RS485, Power screw terminal
- Camera: MIPI CSI-2 port (15pin 1.0mm FPC connector)
- Video: HDMI port, supports 4K 30fps output
- Storage: Micro-SD card socket for Compute Module 4 Lite (without eMMC) variants
- Fan Header: allows speed adjustment 5V
- Indicator: Power indicator, CM4 status indicator
- Power input: 7-36V
- Product weight: 280g
- Dimension: 12 x 10 x 3 cm
Package Includes:
- 1 x CM4-ETH-RS485-BASE-B
- 1 x Fan
- 1 x Screwdriver
- 1 x Screws pack
Technical Specifications
| Brand | WAVESHARE |
|---|---|
| SKU | AI7502 |
| Weight | 0.64 kg |
| Availability | Out of Stock |
Applications & Use Cases
The Waveshare Dual ETH Mini-Computer For Raspberry Pi Compute Module 4 (Without Power Adapter) is a versatile usb interface module used across a wide range of applications including serial communication, industrial automation, data logging, PLC interfacing, and IoT gateway.
Common use cases:
- Converting USB to RS485 for industrial equipment
- Building a data logger for factory sensors
- Debugging embedded systems via UART
This product is ideal for embedded system developers and industrial automation engineers.
Technical Tip: Industrial-grade modules with isolation protect against ground loops and voltage spikes in noisy environments.
Shipping & Delivery
- Free shipping on orders above ₹999 across India
- Dispatched within 1-3 business days
- Expected delivery: 3-7 business days depending on location
- Secure packaging to ensure safe transit of electronic components
- Genuine WAVESHARE product sourced from authorized channels


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Okay Waveshare Dual ETH Mini-Computer For Raspberry. Works but I expected better thermal performance out of the box.
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Devansh Verma –
Okay Waveshare Dual ETH Mini-Computer For Raspberry. Works but I expected better thermal performance out of the box.
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