DFRobot
LattePanda IOTA 51W PoE Expansion Board (IEEE 802.3bt)
· MPN: DFR1248
Designed specifically for the LattePanda IOTA single-board computer, this expansion board adds IEEE 802.3bt PoE++ power and Gigabit Ethernet data over a sing...
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Designed specifically for the LattePanda IOTA single-board computer, this expansion board adds IEEE 802.3bt PoE++ power and Gigabit Ethernet data over a single Ethernet cable. It can deliver up to 51W, helping simplify installations where a separate power adaptor would be awkward or where peripherals also need a stable supply.
The board provides a dedicated 12V DC output for external devices such as sensors, cooling fans or small actuators, making it useful for self-contained industrial control, edge computing, IoT gateway and smart surveillance builds. It connects to the LattePanda IOTA via a PCIe 3.0 x1 FPC connector.
The pack includes 51W PoE Expansion Board x1, 16-Pin FPC Cable x1, 4-Pin Power Cable x1, M3 Single-ended Hex Standoff (for stacking on top) x4, M3 Double-ended Hex Standoff (for side-by-side mounting) x4, M3 Screw x4 and User Manual x1. DFRobot also provides a product wiki for setup documentation.
Features:
- 51W high-power PoE supply: Complies with IEEE 802.3bt and provides a maximum power output of 51W.
- Single-cable power and networking: Combines power and data transmission over one Ethernet cable to reduce cable clutter and simplify deployment.
- Gigabit networking: Maintains a high-speed 1.0 Gbps network connection.
- External device power output: Dedicated 12V DC connector can power components such as sensors, cooling fans or actuators.
- LattePanda IOTA integration: Engineered specifically for direct use with the LattePanda IOTA single-board computer.
Specifications:
- PoE Standard: IEEE 802.3bt
- PoE Input Voltage: 37–57V DC
- Output Voltage: 12V DC
- Maximum Output Power: 51W
- Ethernet Port Speed: 1.0 Gbps (Gigabit)
- Connection Interface: PCIe 3.0 x1 FPC connector (for direct connection to LattePanda IOTA)
- Power Output Interfaces: 4-Pin power connector; 12V DC connector
- 4-Pin power connector: Powers the LattePanda board
- 12V DC connector: Powers external devices
- Dimensions: 88mm × 70 mm
Important notes: Only the Ethernet port on this expansion board supports PoE; the built-in Ethernet port on the LattePanda IOTA board does NOT support PoE. Use IEEE 802.3bt compatible PoE switches or routers, as lower-specification devices such as 802.3af/at can cause insufficient power, instability, frequent reboots or failure to boot. The silver inductor marked “100” may become slightly warm under light loads due to SSR FPWM mode operation; this is normal and does not affect performance or product lifespan.
Jargon buster
Plain-language definitions for the technical terms used above.
- 802.3af/at
- IEEE 802.3af (PoE) and 802.3at (PoE+) are earlier Power over Ethernet standards that supply less power than the newer 802.3bt, providing roughly 15 W and 30 W at the source respectively. When a device is designed for higher-power PoE, using one of these lower-power sources may cause it to reboot or fail to start.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- edge computing
- Edge computing means processing data close to where it is collected, such as on the device itself, rather than sending everything to the cloud. This can reduce delays, internet dependence, and privacy concerns in sensor, camera, and robotics projects.
- FPC
- FPC stands for flexible printed circuit, a thin flat flexible cable or connector style often used where space is tight or some movement is needed, commonly for displays, cameras and other high-density connections. Connecting to an FPC connector generally needs a matching cable with the correct pin count, pitch and contact orientation.
- FPWM mode
- Forced pulse-width modulation is a power-converter operating mode that keeps switching regularly even at light loads. It can make parts such as inductors run slightly warm, so it helps explain normal behaviour rather than a fault.
- IEEE 802.3bt PoE++
- IEEE 802.3bt, also known as PoE++ or 4-pair PoE, is a Power over Ethernet standard that delivers significantly more power over an Ethernet cable than earlier PoE versions, up to roughly 60-90 W at the source. When a device requires 802.3bt, it needs an 802.3bt-capable switch or injector to receive enough power to run reliably.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- PCIe 3.0 x1
- PCIe 3.0 x1 is a high-speed internal expansion interface that uses a single PCI Express data lane of the 3.0 generation. When a board or expansion card lists PCIe 3.0 x1, the card and slot must physically and electrically match for the connection to work.
- PoE
- Power over Ethernet lets one Ethernet cable carry both network data and electrical power. This is useful when installing a device where running a separate power adaptor would be difficult.
- single-board computer
- A complete computer built onto one circuit board, usually including the processor, memory, ports, and connectors. This matters because accessories like heatsinks must match the board’s layout and mounting holes to fit properly.
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