Introduction:

      Power over Ethernet (PoE) is a critical solution that allows both data transmission and power delivery over a single Ethernet cable. This technology is implemented through RJ45 connectors in Ethernet networks and is widely applied to Internet phones, wireless access points, IP cameras, computer devices, and other equipment that can be powered by Ethernet. PoE equipment starts without an additional power plug/socket, reducing the time and cost associated with power cord configuration, and therefore lowering the overall expense of the system.

 

What is PoE technology?

The complete PoE system consists of two parts:

Power Sourcing Equipment (PSE) and Powered Device (PD).

 

1. Power Sourcing Equipment (PSE):The power sourcing equipment (PSE) includes Ethernet network switches, routers, and hubs that support PoE function.

2. Powered Device (PD): The powered devices (PD) mainly include PoE IP cameras, as well as applications such as PoE speakers and PoE LED.

 

The following table illustrates the three main PoE standards (802.3af, 802.3at, and 802.3bt), their corresponding power outputs, output voltage ranges, and supported device types.

 

802.3af Standard:

      The 802.3af standard (PoE) defines the basic form of Ethernet-based power delivery, suitable for devices with lower power demands. Power Sourcing Equipment under this standard provides a maximum output power of 15.4W with an output voltage range between 44V and 57V. Powered Devices (PDs) receive input power ranging from 3.84W to 13W. Typical devices using this standard include VoIP phones and wireless access points, such as the traditional VoIP phone.

802.3at Standard:

      The 802.3at standard (also known as PoE+) offers higher power output, making it ideal for devices with greater power requirements. PSEs can supply up to 30W, with an output voltage between 50V and 57V. PDs can draw up to 25.5W. This standard supports devices like Video IP Phones, which require more power for video conferencing functionality.

802.3bt Standard:

      With the increasing power demands of devices, the 802.3bt standard (PoE++) provides even greater power output. The standard is divided into Class 5 through Class 8, with a maximum PSE output power of 90W. This high-power capability supports devices like laptops and high-end video equipment. The PD Input voltage ranges from 41V to 57V, with PDs receiving between 40W and 71.3W, such as the laptop shown in the table.

 

PoE technology enables devices to be located up to 100 meters away from the power source. However, with longer transmission distances, voltage drop and power loss become more significant. To address this challenge, PoE devices typically use higher supply voltages, particularly in the 48V to 56V range, to reduce transmission losses. CINCON offers a wide selection of 48V, 54V, and 56V models, ideal for PoE applications. These power supplies are widely compatible with various devices that require stable power transmission, such as IP cameras, VoIP phones, wireless access points, and laptops. They are suited not only for short-distance power delivery but are especially optimized for long-distance cable transmission. Our products are the ideal choice for modern networking and smart device solutions.

 

What Could CINCON offer?

      CINCON offers a comprehensive range of AC/DC power supplies and DC/DC converters designed for seamless integration with PoE modules and switches, addressing the evolving demands of industrial and specialized applications.

After the release of IEEE 802.3bt and the need for more port connections with PD products, there is an increasing demand for higher power output from Power Sourcing Equipment. CINCON"s partners have already implemented various power supply combinations to meet market demands.

CINCON provides key advantages for customers developing PoE applications, offering power solutions that ensure compatibility, performance, and flexibility across a wide range of use cases:

PoE-Optimized Models: Available in 48V, 54V, and 56V outputs, ideal for devices such as IP cameras, VoIP phones, wireless APs, and laptops. Designed for both short- and long-distance power transmission.

High Power Demand Ready: In response to IEEE 802.3bt and growing port requirements for PD devices, Cincon supports higher power output with proven power configurations already adopted by partners.

Universal AC Input: All AC/DC power supplies support a wide input range of 90–264 Vac for global compatibility.

Versatile DC/DC Converters: Offered in standard, high input (up to 425 Vdc), and ultra-wide input ranges to suit general industrial needs and demanding sectors like railway systems.

Compact & Reliable: Featuring various output options, compact sizes, and advanced heat dissipation via heat sinks or baseplate cooling—ideal for harsh environments like 5G base stations and smart surveillance.

Fanless Design Support: Enables quiet operation when combined with heat sinks or custom enclosures, enhancing product reliability and competitiveness.

Customized Solutions: CINCON provides tailored power solutions to meet specific project needs, ensuring performance, stability, and customer confidence.

 

What else does CINCON offer?

CINCON products are not only suitable for PoE applications but also incorporate a variety of protection features and operational functions to support a broad range of applications.

 

Here are some examples:

AC/DC open frame power supply, take CFM500S series as an example,

1. The product includes OTP, OVP, OCP, and short circuit protection.

2. Features like PS-On signal, Stand-by Output Voltage, Power Good & Power Fail Signal, Parallel, PMBus are available, providing product designers with more ways to use.

3. Operating Case Temperature -40 to +85°C meets industrial standards

4. Shock & Vibration Meet MIL-STD-810F, Operating Altitude 5000m, provide stable quality of power.

 

For DC/DC converters, the CQB75W14 series is a commonly used example in PoE applications.

1. Input Voltage 12-160Vdc meets PoE application voltage range

2. Output Voltages 5, 12, 15, 24, 28, 48, and 54Vdc are suitable for multiple demanded voltages

3. Operating Case Temperature -40 to +105°C is used in severe temperature conditions

4. Fully Protected (OTP/OCP/OVP/UVLO) provides secure protection even in the event of various external application failures

5. Compliant with Shock & Vibration MIL-STD-810F/EN61373, Thermal Shock MIL-STD-810F, and Operating Altitude up to 5000m provide reliable assurance of power supply stability for the product.

6. Remote On/Off for quick and convenient power control.

 

Suitable Products:

The tables below list power supplies that are ideal for IEEE 802.3af, at, and bt standards, which can be used alongside PoE modules or PoE switches as suited by the product designer.

 

AC/DC Power Adapters

 

AC/DC open-frame, enclosed, and brick power supplies

 

2”x1” DC/DC Converter & DC/DC Brick Converters

 

Need Supports? Contact sales@cincon.com