#Earthnet energy air conditioner Patch#

Although this document specifically addresses the power and cooling requirements for PoE switches (end-span PSEs), the same concepts and results apply equally where mid-span PSEs are utilized.įigure 2 ? Typical Mid-span PoE injectors Originally, typical applications for PoE included IP phones and wireless access points since the IEEE PoE Standard (IEEE Std. The other type of PSE is the end-span, which injects the power, along with the data stream, at the network switch itself.

#Earthnet energy air conditioner Patch#

It is typically connected in-line, between the network switch and the patch panel, adding power to the line. A mid-span PSE is a unit that injects power downstream, after the network switch.

PSEs generally fall into two categories: mid-span and end-span. In the broadest sense, there are two primary types of PoE devices: those that provide and integrate power onto the data cabling, and the end devices that use this supplied power, as summarized in Table 1.Ī PoE injector is the Power Sourcing Equipment (PSE) that supplies power into the powered device (PD). PoE Components, Terminology, and Capabilitiesīefore delving too deeply into specific power and cooling needs for PoE applications, one must first understand the basic required components for PoE applications and the typical types of devices that take advantage of its benefits.įigure 1 illustrates the components and basic connectivity found in every PoE application. Understanding the basics of PoE and the implications of its use promotes favorable decisions concerning electrical and mechanical system design for spaces where this equipment may be installed. This can be caused by insufficient available power or inefficiency due to improperly sized cooling in the equipment room. However, a lack of understanding of how and where power is sourced and used in a PoE environment may result in unanticipated downtime. The benefits include simplified infrastructure management, reduced power consumption and operational costs, improved safety, greater flexibility regarding placement of devices, and higher reliability (with less infrastructure there is less opportunity for error). Power-over-Ethernet (PoE) enables the use of a single Ethernet cable for simultaneous delivery of power and data, eliminating a significant number of electrical receptacles and circuits.