PoE Expansion Board for Raspberry Pi CM4S CM3 3Lite 3+ Series

PoE Expansion Board for Raspberry Pi Compute Modules

Power and expand your Raspberry Pi Compute Module projects with this versatile PoE Expansion Board, designed to be compatible with Raspberry Pi CM4S, CM3, CM3 Lite, CM3+, and CM3+ Lite series core boards. Whether you're building embedded systems, IoT devices, industrial controllers, or media servers, this board gives you a rich set of connectivity options in one compact PCB package.

Made in Mainland China.

Key Features

• 40-Pin GPIO Interface: Onboard Raspberry Pi-compatible 40-pin GPIO header for easy access to expansion boards and peripherals.
• PoE Ethernet (10/100M): Onboard adaptive 10/100M Ethernet port with Power-over-Ethernet (PoE) support — power your board directly through the network cable, no separate power supply needed.
• 4x USB Ports: Four USB interfaces for connecting keyboards, mice, storage devices, dongles, and more.
• 2x CSI Camera Interfaces: Dual CSI ports let you connect up to two cameras simultaneously — ideal for computer vision, surveillance, and stereo imaging projects.
• HDMI-Compatible & DSI Display Output: Supports display connectivity via HDMI-compatible and DSI interfaces for monitors, touchscreens, and digital signage.
• USB-to-UART Bridge: Built-in USB-to-UART converter for straightforward serial port debugging without extra adapters.
• Cooling Fan Interface: Dedicated fan header with support for power-on automatic control or programmable pin control to keep your compute module running cool.
• Fully Isolated SMPS: Adopts a fully isolated switch-mode power supply for stable, safe, and efficient power delivery.

Specifications

• Compatible Modules: Raspberry Pi CM4S, CM3, CM3 Lite, CM3+, CM3+ Lite
• Ethernet: 10/100M Adaptive with PoE Support
• USB Ports: 4x USB
• Camera Interfaces: 2x CSI
• Display Interfaces: HDMI-compatible, DSI
• GPIO: 40-Pin Raspberry Pi Standard
• Power Supply: Fully Isolated SMPS
• Color: Blue
• Material: PCB

What's in the Box?

• 1x PoE Expansion Board

Note: Due to different production batches, minor differences in appearance, color, or printed text may occur — these do not affect functionality. Light reflection and display calibration differences may slightly alter the appearance of colors in product images. Measurement tolerance: ±1–3 cm.

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For more information on Raspberry Pi compute module hardware and PoE standards, visit the NIH — or for technical guidance on electronics and embedded systems, refer to NCBI.

Frequently Asked Questions

Q: Which Raspberry Pi Compute Modules are compatible with this PoE Expansion Board?

A: This PoE expansion board is compatible with Raspberry Pi CM4S, CM3, CM3 Lite, CM3+, and CM3+ Lite series compute modules. It is not designed for standard Raspberry Pi single-board computers (like Pi 4 Model B), but specifically for the Compute Module form factor.

Q: Does this board require a separate power supply, or can it be powered via PoE?

A: This board supports Power-over-Ethernet (PoE), meaning you can power the entire board and attached compute module directly through a PoE-enabled network switch or injector via the Ethernet cable — no separate power adapter required when using a PoE source.

Q: Can I connect two cameras at the same time using this board?

A: Yes! The board features two CSI camera interfaces, allowing you to connect two Raspberry Pi-compatible cameras simultaneously — perfect for stereo vision, multi-angle recording, or dual-camera IoT projects.

Q: How is the cooling fan controlled on this expansion board?

A: The onboard cooling fan interface supports two control modes: automatic power-on operation (fan runs whenever the board is powered) or programmable GPIO pin control, which lets you manage fan speed and on/off behavior through software.