The standard supply voltage of Power over Ethernet is 48V, and the supply voltage range is 44-57V.
POE technology is a technology that transmits power and data over Ethernet lines. It is widely used in powering devices such as IP phones, wireless access points, and network cameras. This can simplify system wiring and reduce construction costs to a certain extent.
POE standards and their supply voltage ranges
IEEE 802.3af: This is the earliest POE standard, with a supply voltage range of 44-57V and a maximum output power of 15.4W. It is suitable for low-power devices such as IP phones and simple wireless access points.
IEEE 802.3at (POE+): The supply voltage range is 50-57V. It has a maximum output power of 30W. This makes it suitable for medium-power devices. These devices include high-definition IP cameras and wireless access points.
IEEE 802.3bt (POE++ or High Power POE): The supply voltage range of Type 3 (POE++) is 50-57V. Its maximum output power is 60W (the actual power available for the device is 51W). It is suitable for high-power devices such as HD video conferencing systems and multi-band wireless access points.
The supply voltage range of Type 4 (High Power POE) is 50-57V. Its maximum output power is 100W (the actual power available for the device is 71W). It is suitable for high-power devices such as LED lighting and some industrial equipment.
Application scenarios and advantages of POE technology
Scenario application:
POE technology is used in many network devices. It sends power and data through twisted pair cables. This makes wiring easier and lowers construction and maintenance costs.
Advantages:
☀ Simplified wiring: No need to lay power lines separately, reducing wiring complexity.
☀ Reduced construction costs: Reduced installation costs for power lines and power sockets.
☀ Increased flexibility: Devices can be effortlessly relocated and reused, with power provided by merely swapping out the network cable.
