Project: IEEE802.3af Power Over Ethernet (Power Over LAN or PoL)

 

 

This Power Over LAN (POL) project took an existing Hirschmann Industrial LAN Hub* and added the necessary POL circuitry to make the device POL compliant. As an added feature, a +24 VDC output was added to the terminal block on the left. This would allow for powering another device as well from the LAN.

Design Services Performed:

Description:

IEEE Standards based - Power Over Ethernet (POE) solves the age old problem of how to power all those useful LAN based appliances without needing an AC outlet at every point of application. We all know the nightmare of developing a really neat LAN network only to face the reality of not being able to find readily available power at every node. IEEE 802.3af solves this by providing a common framework with which all devices can be designed to operate from. I have worked with both the source end and application end of 802.3af - I understand the specifications, safety measures needed and limitations of the specification.

  • Design of compliant AC or DC to 48 volt source modules.
  • Design of single or multiple output application power supplies.
  • High efficiency - even with isolated outputs possible.
  • Low conducted / radiated EMI designs.
  • Fully IEEE802.3af compliant designs.
  • Fast design times - using the components in your supply chain.
  • Environmentally rugged designs, -40 to 70 Deg C operating range, fully ESD protected.

 * The Hirschmann hub is a really well built device and highly recommended for industrial applications.

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