Waveshare Gigabit/2.5G Dual Ethernet Multi-Function Expansion Board Based On Raspberry Pi CM5 (NOT included), Supports RS485 Industrial Communication, 4G / 5G Module And 4K Display Output, With Case and Power Supply

Gigabit/2.5G Dual Ethernet Multi-Function Expansion Board Based On Raspberry Pi CM5 (NOT included), Supports RS485 Industrial Communication, 4G / 5G Module And 4K Display Output, With Case and Power Supply

Enhance the capabilities of your Raspberry Pi CM5 with this powerful multi-function expansion board, designed for advanced networking, industrial communication, and multimedia applications. Built for versatility and performance, it integrates dual Ethernet ports, RS485 communication, and support for high-speed cellular connectivity.

This expansion board features both Gigabit and 2.5G Ethernet interfaces, enabling high-speed, stable network connections ideal for data-intensive applications such as edge computing, IoT gateways, and network appliances. The onboard RS485 interface ensures reliable industrial communication, making it suitable for automation and control systems.

With support for 4G/5G modules, the board provides flexible wireless connectivity options for remote deployment scenarios. Additionally, it supports 4K display output, delivering high-resolution visuals for multimedia or monitoring applications.

User Manual / Datasheet / Example Codes Etc.

Features

• Do not plug or unplug any devices other than USB and HDMI while the system is powered on
• The Type-C port can be used as a USB SLAVE interface for flashing images or powering the device
• Onboard 1 USB port group with a total maximum output current of 2A (1x USB 3.2 Gen1 + 1x USB 2.0 port)
• Supports triple independent displays. When a MIPI DSI driver is added, the system will default to connecting to it regardless of whether a screen is connected, and the screen will display in split-screen mode (depending on the system version)
• Onboard M.2 M KEY interface, supports NVMe SSD protocol (or PCIe protocol AI modules).
• Onboard M.2 B KEY interface, supports 4G/5G communication modules
• 4 isolated RS485 channels + 1 isolated digital input + 1 isolated relay (fully isolated)
• Onboard encryption chip and single controllable buzzer
• Onboard BOOT button: Press and hold the BOOT button before powering on, then connect to a PC via Type-C to enter flashing mode
• When using Type‑C for programming, do not connect any other devices, otherwise insufficient power may prevent the device from being recognized

Specifications

• CM5 socket: Suitable for all variants of Compute Module 5
• Networking
• 1000M Ethernet RJ45 port × 1
• 2500M Ethernet RJ45 port × 1
• USB: USB 2.0 port (Type-C) × 1
• USB 2.0 port (Type-A) × 1
• USB 3.2 Gen1 port (Type-A) × 1
• Video: HDMI port × 1, supports 4K display output
• M.2
• M.2 M KEY (PCIe Gen2/3 × 1, supports 2230 / 2242 / 2280 NVMe or AI module)
• M.2 B KEY, supports connecting 4G / 5G communication module
• Storage: TF card socket for Compute Module 5 Lite (without eMMC) variants
• Serial Interface: RS485 × 4
• Digital Input: 1 × digital input (input voltage: 5V ~ 36V)
• Relay: Contact rating: ≤ 10A 250V AC or ≤ 10A 30V DC
• Fan header: 5V, 4PIN JST-SH PWM fan header
• Buzzer: 1-ch controllable buzzer
• Other: Onboard encryption chip
• Power Input: 7V ~ 36V wide voltage range (screw terminal + jack), 5V 5A Type-C port
• Dimensions: 132.50 × 112.20 × 34.50 (mm)

Package Includes

• 1x Metal case (top cover + back cover) and dual side panels
• 1x CM5-ETH-RS485-4G-BASE
• 1x Rail-mount buckle (20mm × 76mm)
• 1x Label
• 5x Pink thermal tape
• 1x PC insulating sheet
• 1x Screwdriver
• 1x Screws pack
• 1x 12V 4A power

More rich interfaces

Features multiple interfaces including ETH / MIPI / HDMI / TF Card Slot / USB / M.2 B KEY / M KEY, easy to use

What's On Board

Dimensions