About the product
- COMPACT RASPBERRY PI 4 POE HAT: Ideal for non-grounded installation, this NON-ISOLATED PoE HAT features optimized footprint. Must be used with a standards compliant IEEE 802.3af PoE or 802.3at PoE+ switch that complies with Section 33.4.1 for power sourcing equipment (PSE) electrical isolation. "Passive PoE" (DC 24V or 48V) is not standards compliant and may cause damage to equipment if connected improperly. Some Ubiquiti switches are not properly isolated and require isolated PoE HATs.
- GROUND LOOPS WARNING: Do not use this device with grounded USB peripherals, HDMI displays, and attachments. Please use the professional PoE model with isolation transformer to prevent electrical loops. In non-controlled PoE applications, ALWAYS use the professional PoE model.
- INTEGRATED PWM FAN CONTROLLER: Based on the EMC2301 SMBus compliant fan controller, this PoE HAT is fully programmable over I2C to control standard 4-pin PWM fans. Set user-space or device-tree based temperature or event triggers for complete fan control from off to maximum RPM. Fan speed tach also provides stall detection, spin-up control, and ramp rate control with 1% accuracy from 500-16K RPM.
- VENTILATED CASE WITH FAN HIGHLY RECOMMENDED: Do not use this product in an enclosed case without active air circulation. Airflow around the HAT and Raspberry Pi 4 Model B ensures performance and stable operation.
- EASY INSTALLATION AND BACKWARDS COMPATIBLE: Please remove all non-essential heatsinks including RAM/USB/Ethernet heatsink before seating the HAT! Supports the latest Raspberry Pi 4 as well as the Raspberry Pi 3 Model B+. Align HAT with GPIO and PoE pins and push down. Make sure to fully seat the HAT by checking and removing any obstructions.
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