Available in a 2-wire model designated the POE31W series and a 3-wire model designated the POE31U series, both series are IEEE802.3at-compliant with output voltage options in 24V or 56V DC and meet the requirements for the Ecodesign (ErP) Directive 2009/125/EC level 2 Annex 1b as well as the ENERGY STAR EPS Version 2.0.