This is a combined Power over Ethernet (PoE) and Uninterruptable Power Supply (UPS) base board for the Raspberry Pi Compute Module 4 (CM4), offering you multiple power supply options alongside a host of other great breakouts and features. The UPS feature uses three 18650 batteries (batteries not included). It can charge the batteries and provide power output for the system at the same time from the external power supply. It automatically switches over to the battery output if the external power supply is unavailable, keeping the system running without any trouble. The board also supports Gigabit 802.3af Power over Ethernet (PoE), allowing you to power your project from a PoE injected Ethernet cable. If PoE isn't right for your project just yet, you can also use the DC input port (7-36V) or the 5V USB-C port. Power options aside, the board also offers: * M.2 M-KEY Slot * Built-in RTC (Real-time Clock) - CR2032 battery required * Colour-coded 40-pin GPIO header * Dual HDMI (4K 30fps) * 4x USB 2.0 ports * Single 22-Pin DSI port for a DSI display * Dual 22-Pin CSI port for camera modules * Micro-SD slot * Header for CM4 cooling fan * Programmable button * Power switch * BOOT selection switch * Activity LEDs for both data and power Note: * CM4, Power supply and batteries not included * The onboard CSI and DSI connectors are 22-pin 0.5mm pitch, it is recommended to buy a CSI adapter and DSI adapter for use with the camera Features * Designed for use with the CM4 * Enables wireless power supply of the module and additionally three external power supply options: USB, DC and PoE interface * Circuit-protecting against overcharging/discharging, short circuits, and reverse polarity * Equipped with a Gigabit Ethernet RJ45 connector, integrates a PoE circuit compliant with the 802.3af standard (5V / 2.5A) * Equipped with M.2 KEY slot for connecting NVME SSD or communication module with PCIE M.2 KEY interface * Charges the batteries and simultaneously powers the system from an external power source * Automatically switches to battery power in the absence of an external power source, thus ensuring trouble-free and continuous operation of the system * Built-in CSI and DSI connectors have 22 pins with 0.5mm pitch, it is recommended to purchase a CSI adapter and DSI adapter for use with the camera and display with 15-pin connectors with 1mm pitch What's on Board Specifications CM4 Socket Suitable for all variants of Compute Module 4 Battery Support Parallel 18650 Li-ion battery × 3 (batteries not included) Networking Gigabit Ethernet RJ45 connector, integrates 802.3af-compliant PoE circuit (5V/2.5A) USB USB 2.0 Type A × 4 Connector Raspberry Pi 40PIN GPIO headers M.2 M KEY slot, for connecting NVME SSD, or communication module with PCIE M.2 M KEY interface Display MIPI DSI port × 1 (22pin 0.5mm FPC connector) Camera MIPI CSI-2 port × 2 (22pin 0.5mm FPC connector) Video HDMI × 2, supports 4K 30fps output RTC Real-time clock with a battery socket (battery not included) Storage MicroSD card socket for CM 4 Lite (without eMMC) variants Fan Allows speed adjustment and measurement, 5V / 12V Indicator M.2 status LED CM4 status LED Power Input 7-36V Dimensions 175.0 × 108.0mm Resources * Product Wiki Package Contents * 1x CM4 POE UPS Base Board CM4, Power supply and batteries not included https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2023-04-19 https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2023-12-27 https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2024-09-18 https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2024-11-29 https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2024-11-30 https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2025-08-06 https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2025-11-28 https://elecena.pl/product/23258478/poe-ups-base-board-for-raspberry-pi-cm4 2025-11-29