High power PoE and HDBaseT

Power over Ethernet (PoE) offers convenience, flexibility, and enhanced management capabilities by enabling power to be delivered over the same CAT5 cabling as data. This technology is especially useful for powering IP telephones, wireless LAN access points, cameras with pan tilt and zoom (PTZ), remote Ethernet switches, embedded computers, thin clients and LCDs.

The original IEEE 802.3af-2003 PoE standard provides up to 15.4 W of DC power (minimum 44 V DC and 350 mA) supplied to each device. The IEEE standard for PoE requires Category 5 cable or higher (can operate with category 3 cable for low power levels).

The updated IEEE 802.3at-2009 PoE standard also known as PoE+ or PoE plus, provides up to 25.5 W of power.

Although 2009 standard prohibits a powered device from using all four pairs for power, some vendors have announced products that claim to be compatible with the 802.3at standard and offer up to 51 W of power over a single cable by utilizing all four pairs in the Category 5 cable. The trend for power demands seem to be up.

Compliance to Power-over-Ethernet safety standards is critical when moving beyond 60W (EE Times)and Compliance with POE safety standards is critical when moving beyond 60W (EDN) articles tells that the current generation of standards-based technology enables up to 60 watts of power to be delivered over four pairs of cabling, which also improves efficiency when compared to earlier two-pair solutions. Compliance with POE safety standards is critical when moving beyond 60W.

As the industry moves toward delivering even more power over the CAT5-or-better cabling infrastructure, system designers and network administrators alike, need to understand various emerging technology options. Some new options can bring expensive and cumbersome deployment complications and, potentially, safety risks.

Some manufacturers have touted their own 100W-per-port solutions or even 200W/port solutions that are not safe. The use of a standard Ethernet-cabling infrastructure for a single port delivering greater than 100W is simply not safe under the NEC standard. The only safe approach for powering devices over Ethernet cabling is to follow IEEE802.3at-2009 specifications. Moving beyond the LPS requirement (sub-100W/port LPS requirement of IEC 60950-1:2011) to greater-than-100W/port implementations requires that the cables be protected with special flame-resistant conduit. A metal enclosure is required if the total PD load is greater than 100W for information data equipment, or greater than 15W for TV and audio equipment.

One standardized 100W solution is one used by HDBaseT Alliance. HDBaseT Alliance is develops 100W power specifications for products that transport uncompressed, high-bandwidth multimedia content, 100BaseT Ethernet, power, and various control signals through a single LAN cable. The key differences between the HDBaseT-powering approach and those from other independent manufacturers pursuing higher power levels are that it:

  • Complies with the section 33.7.1 of the IEEE802.3at-2009 standard, which mandates that all PSEs conform to International Electrotechnical Commission (IEC) 60950-1:2001 specifications including classification as a Limited Power Source (LPS) carrying no more than 100 volt-ampere (VA) – or 100W – per port without the need for special over-current protection devices, and
  • Performs Powered Device (PD) detection followed by PD classification to determine a PD’s consumed power level prior to its ignition.

In a typical HDBaseT implementation, the PSE is installed and powered by a 50 to 57-volt DC power supply, and all PDs receive power directly over the HDBaseT link across all four pairs of CAT5-or-better cables. Additionally, core PoE technology has been enhanced for HDBaseT to use a 1 amp current for every two cabling pairs, 3-event classification to identify compliant PSEs, and identify the cable length/resistance (draw more power when required not exceeding 100W, rather than assuming a worst-case cabling infrastructure at all times). This enables HDBaseT technology to transfer of up to 100W of continuous DC power, per port, from one side of the HDBaseT link to the other.

HDBaseT is fully backwards-compatible with the IEEE802.3at-2009 PoE specification. HDBaseT also does not infringe on any of the mandated PoE safety requirements.

HDBaseT’s ability to deliver up to 100W of power (over 100m, via a single LAN cable, without any additional power source) is actually very nicely aligned with trends in energy usage and demand. The power level is more than adequate for supporting today’s typical 40-inch LED TV, which requires 70W of power. It is expected that both LCD and LED TV monitors will soon be averaging approximately one watt of power consumption per inch of screen size. Regardless of screen size EnergyStar™ 6.0 is targeting a cap of 85 W for all screen sizes.

PoE continues to evolve and offer an even wider variety of high-value power-delivery and management capabilities.


  1. Tomi Engdahl says:

    Valens Takes to Untangling and Untwisting Connected Cars

    High-end cars are some of the most complex machines in the world, with miles of wires linking more than a hundred electronic control units powering everything from windshield wipers to digital speedometers. This is all programmed with millions more lines of code than a fighter jet.

    Valens started out over a decade ago selling networking chips for professional audio and visual devices. But now it is trying to use the same technology to recreate the car’s connective tissue. Its chips encode data so that they can traverse the car’s network over a single unshielded twisted pair cable, replacing many others to reduce cost and weight.

    “The car is becoming like an advanced data center,” said Micha Risling, vice president of Valens’ automotive business, only two years old but already selling a series of chipsets. The comparison works because the cameras, radar, and other sensors in a fully driverless vehicle could discharge more than four terabytes of data every hour and a half of driving.

    To handle it all, Valens is betting on HDBaseT, a standard it invented to transmit uncompressed audio and video, control, Ethernet, USB, and a hundred watts of power simultaneously. It can do this over a single copper cable, which does not have the thick, expensive insulation of traditional cables. That way, it can be tucked into tight spaces in cars.

    Along with Samsung and Sony, the chipmaker turned HDBaseT into a standard in 2010.

    over a copper cable up to 328 feet

    But last year, Daimler said that it would use HDBaseT to connect its infotainment, telematics, and advanced driver assistance systems. Valens’ chief executive, Dror Jerushalmi, said that Daimler would start using it in production cars by 2020. GM, which sits on the alliance’s board, declined to comment on whether it planned to use HDBaseT.

    With the money, Valens can expand its product line to compete with bigger rivals like Marvell and Broadcom, which makes networking chips for Ethernet that – like HDBaseT – work with a single unshielded copper cable.

    “The automotive industry will not have a choice but to move to a centralized approach, simply given that so much processing power is needed. And again, the raw data will have to be processed differently to be used in different clusters,” said Risling in a recent interview. “The sensors really should be as dumb as possible.”

    “Moreover, HDBaseT is not limited to point-to-point topologies and can also support daisy-chaining as well as multi-hop switching and [in that way] reduces the connectivity bottlenecks towards the main ECUs,” he said. “Our ability to support multi-streams over a single channel opens the door for advanced cost-effective interfacing options with other chips in the system.”

    Valens can also deal with electromagnetic interference that leaks out of cables and can cripple performance. The company’s chips can monitor and cancel noise. It also shorted the range of HDBaseT to 50 feet so that cables could transmit at lower frequencies, which can better resist interference.

  2. Tomi Engdahl says:

    Next Ethernet Alliance PoE Plugfest to provide critical support for Power over Ethernet certification program

    The Ethernet Alliance, a global consortium dedicated to the continued success and advancement of Ethernet technologies, has announced details of its next plugfest. Dedicated to pre-standard testing of Power over Ethernet (PoE) technologies against Draft 3.2 of the IEEE P802.3bt standard, the event will be held the week of February 12, 2018, at the University of New Hampshire InterOperability Laboratory (UNH-IOL) in Durham, N.H. Open to Ethernet Alliance members, component developers, system providers, and test equipment manufactures will benefit from participation in this PoE plugfest. Test results will be important to both the ongoing development of the IEEE’s PoE standard and the second generation of the Ethernet Alliance’s PoE Certification Program.

    Per an Ethernet Alliance statement, “As the range of PoE-enabled devices and applications expands and diversifies, the need for additional power is becoming more urgent. With emerging devices and applications requiring increased amounts of power, the IEEE P802.3bt standard is being developed to allow delivery of up to 90 watts of power via existing Ethernet cabling. With the specification’s ratification expected in September of 2018, the Ethernet Alliance is hosting a members-only interoperability plugfest to test equipment to perform pre-standard testing against the IEEE P802.3bt draft standard. Findings will be shared with the IEEE P802.3bt Task Force, providing the group with valuable insight; data gathered during the event will also be leveraged for the second generation of the Ethernet Alliance’s PoE Certification program. This Ethernet Alliance plugfest will allow the industry to get ahead of intensifying interest in advanced PoE solutions, opening the door to new market opportunities.”

  3. Tomi Engdahl says:

    PoE, PoE+ and Passive POE

    802.3af or Active PoE:

    This is the oldest standard for providing power over Ethernet cables. It allows a maximum of 15.4 watts of power to be transmitted, and the devices (switch and peripheral) negotiate the amount of power and the wires on which the power is transmitted. If a device says it is PoE-compliant, that compliance is usually referring to 802.3.af.

    802.3at or PoE+:

    The main difference between PoE and PoE+ is the amount of power that can be transmitted. There is still negotiation to determine the amount of power and what wires it’s transmitted on, but PoE+ supports up to 25.5 watts of power.

    Passive PoE:

    This provides power over the Ethernet lines, but it doesn’t negotiate the amount of power or the wires on which the power is sent. Many devices use Passive PoE (notably, the Ubiquiti line of network hardware often uses 24v Passive PoE) to provide power to remote devices. With Passive PoE, the proprietary nature of the power specifics means that it’s often wise to use only power injectors or switches specifically designed for the devices that require Passive PoE. The power is “always on”, so it’s possible to burn out devices if they’re not prepared for electrified Ethernet wires, or if the CAT5 cabling is wired incorrectly.

  4. Tomi Engdahl says:

    Product Bulletin
    Power over Ethernet (PoE) Injector
    Industrial PoE/PoE+ Injector with Optional Power Supply Capabilities

  5. Tomi Engdahl says:

    37 products certified in Ethernet Alliance’s PoE Certification program

    The Ethernet Alliance recently announced that 37 products have been certified through the alliance’s Power over Ethernet Certification Program. “Products from multiple Ethernet industry leaders were tested at the University of New Hampshire InterOperability Laboratory [UNH-IOL] in Durham, NH,” the alliance said. “Newly certified products range from component-level evaluation boards, to power sourcing equipment [PSE] enterprise switches, to midspan PoE power sources.”


  6. Tomi Engdahl says:

    PoE circuit surge protectors install for Cat5e, Cat6 and Cat6A cabling infrastructure

    DITEK has announced the debut of the company’s DTK- MRJEXTS surge protector, designed to be installed on the outputs of PoE extender devices.

    “In the event of a power surge, installing this product will ensure your PoE extender devices are not damaged or destroyed and your system will maintain operational.”

    As stated by DITEK, “The DTK-MRJEXTS is designed to handle data speeds up to 10GbE without signal degradation and is ready for high-wattage applications with PoE+ and Hi-PoE. It contains shielded RJ45 connections with external grounding screw and complies with IEEE standards 802.3af and 802.3at for PoE.


  7. Tomi Engdahl says:

    37 products certified in Ethernet Alliance’s PoE Certification program

    The Ethernet Alliance recently announced that 37 products have been certified through the alliance’s Power over Ethernet Certification Program. “Products from multiple Ethernet industry leaders were tested at the University of New Hampshire InterOperability Laboratory [UNH-IOL] in Durham, NH,” the alliance said. “Newly certified products range from component-level evaluation boards, to power sourcing equipment [PSE] enterprise switches, to midspan PoE power sources.”

    Tam Dell’Oro, founder and chief executive officer of research and analyst firm Dell’Oro Group, observed, “Multivendor interoperability is Ethernet’s hallmark and an important consideration. Consumers want to know their products will just work, while industry players need a way to find new partnership opportunities with companies offering certified equipment. The global Ethernet PoE switch market is surging, with 750 million PoE-enabled switches and hundreds of millions of devices expected to be delivered over the next five years.


  8. Tomi Engdahl says:

    5 tips to make the most of your HDBase-T devices

    As we enter into the Internet of Things (IoT) era, HDBase-T is an essential communication channel for smart home technology, because many IoT devices cannot deliver quality content over standard or high-speed WiFi broadband without compression. Where standard VGA and HDMI are either a partial, or ineffectual, answer for IoT needs, HDBase-T supplies an efficient, comprehensive solution.

    HDBase-T is playing a leading role in almost every conceivable technological venue. Even in the field of smart vehicles and autonomic cars, which are dependent on quality high-definition visual and data content transmission, HDBase-T is playing a major role. HDBase-T is leading the IoT revolution to new innovative phases, implementing complex technology using simple standard Category X cable. The revolution accrued not only in the residential arena, but also in the business world with skyscraper office buildings, smart factories, and smart shopping experiences. All these environments are demanding high-quality experience, and because most of the Ethernet infrastructures in business cabling architectures already exist, upscaling to HDBase-T is both easy and intuitive.

    Every HDBase-T port has its own specification, which professional installers and integrators must be aware of. The HDBase-T protocol supports 5Play features: power, Ethernet, A/V, USB, and control. Each of these can be operated in various configurations.

    Many professional installers and integrators do not know how to evaluate the performance of HDBase-T connections (it is particularly difficult in 4K resolution), and are unaware of possible compatibility/interoperability issues when connecting different HDBase-T ports. These problems can affect the overall functionality and system quality.

    The days of HD are behind us. Today, demand is for instantaneous communication, higher and faster data transfer, with maximum quality and no tolerance for errors. HDBase-T technology is becoming much more popular and prevalent in the AV industry, and in smart homes. In the near future, the devices all around us will both import and export data and content, from and to outside sources.

  9. Tomi Engdahl says:

    In-ceiling PoE switch supports digital lighting and other building applications

    Microsemi recently introduced the PDS-208G Power over Ethernet swtich that the company said offers “an optimal and cost-effective solution designed specifically for digital ceiling installations.” It is compatible with any IEEE 802.3af or 802.3at PoE lighting fixture. When the 802.3bt standard is completed—which is expected to happen later in 2018—Microsemi will offer a compliant PDS-208G, the company added.

    The 240-watt fanless switch supports full-power mode by providing 30 watts for eight ports simultaneously. Any individual port can operate at up to 72 watts.

    “There are hundreds of models of PoE switches in the market,” Ronen continued. “Few are suitable for ceiling installation.” The PDS-208G fanless switch operates silently, he pointed out, which avoids distraction in the workspace from noisy fans in the ceiling. The fanless product is also highly reliable, Ronen added, with a highly efficient power supply.

    In addition to supporting LED lighting, the switch can support building applications including presence sensors, building automation, HVAC, IP cameras, and WiFi access points.

  10. Tomi Engdahl says:

    Fluke Networks’ Versiv cabling certification system adds support for Legrand Clarity, Superior Essex PowerWise PoE products

    Fluke Networks announced that its Versiv cabling certification system now supports Legrand’s family of Clarity cords and high density jacks and Superior Essex Communications’ LP PowerWise cabling products. The combined PowerWise and Clarity system is designed to provide superior performance for Power over Ethernet (PoE), including the IEEE 802.3bt draft 3.0 standard.

    Per a press release, “This new capability extends Fluke Networks as the only provider of certification products and services in the structured cabling industry with the capability to test and certify all IEEE standards and requirements for 802.3bt PoE installations worldwide.”

    “PowerWise + Clarity is the ultimate solution for 4PPoE applications, offering enhanced reliability and energy efficiency,” asserts Gary Hess, VP Innovation, Legrand. “With support built into Fluke Networks Versiv testers, contractors and installers can expand their service offerings immediately. This will be key as the number of PoE installations continues to increase in 2018,” adds Will Byran, vice president, marketing and technology, Superior Essex.

  11. Tomi Engdahl says:

    Transition Networks integrates managed PoE+ switches with Milestone Systems’ XProtect VMS

    Transition Networks announced that it has partnered with Milestone Systems, a provider of open platform video management software (VMS), to integrate its Smart Managed PoE+ Switches with Device Management System (DMS) software into the Milestone Systems XProtect VMS platform.

    According to the companies, “Through this integration, XProtect VMS security integrators and end users will have improved control and better management of security cameras and other connected devices. Users will be able to access management and diagnostic capabilities through the Milestone XProtect VMS for all devices connected to the Smart Managed PoE+ Switches.”

    Transition Networks’ Smart Managed PoE+ Switches provide Layer 2 PoE+ connectivity that power devices including IP cameras, wireless access points, and VoIP phones. The built-in DMS capability provides time-saving installation features that enable security integrators or network administrators to establish and document a baseline deployment, and automatically discover and remotely configure attached IP-addressable powered devices (PDs).

    DMS also features Auto Power Reset (APR) to monitor and automatically restart edge devices, saving on truck rolls to remote locations for simple rebooting of the attached PDs.

  12. Tomi Engdahl says:

    USB-C kit for power over Ethernet

    The AT-USBC-Kit includes a custom 802.3af/PoE+ splitter that supports 25 watts PoE+ (both active and passive) using a 25W, 24V paassive PoE design to control both the Power Supplying Equipment (PSE) and the Powered Device (PD). With the uPoE (IEEE 802.3bt) standard coming in 2018, PoE Texas has developed 60 watt PoE PSE’s with upcoming designs for 60 watt PoE splitters to support full capacity USB-C PD.


  13. Tomi Engdahl says:

    Microsemi Announces Digital Ceiling Power-Over-Ethernet Switch Offering Optimal and Cost-Effective Solution for PoE Lighting and Other Digital Ceiling Applications
    Unique Switch Compatible to Any IEEE802.3af/at Lighting Fixture Provides New Features and Power Savings

  14. Tomi Engdahl says:

    Smart Lighting Solutions

    Energy expenses can skyrocket due to over-illumination of smart buildings, city street lights and home lighting fixtures. This has created a challenge for enterprises increasingly connecting everything into a vast Internet of Things (IoT), as well as cities attempting to create an inviting and safe environment for residents. The low cost and high performance of Microsemi’s smart lighting solutions provide a more cost-effective energy output, ultimately improving lighting infrastructure and decreasing the total cost of ownership (TCO) over time.

    Microsemi PoE solutions reduce the parameter to 10 mW consumed to keep the port alive, which is 10 times better than current competitor solutions. With its ability to deliver power and data over a single cable, using PoE in smart lighting applications greatly simplifies deployment and management over a unified infrastructure.

  15. Tomi Engdahl says:

    PoE Lighting Convergence: LED Meets IT

    Power over Ethernet (PoE) could disrupt the lighting industry more than the LED ever has. By powering lighting with Ethernet switches and inexpensive Cat 5 or 6 cable, instead of hazardous 120V electrical systems, PoE threatens to move lighting from the electrician’s realm into IT. Lighting is everywhere in a building, and major IT players are poised to exploit the lighting layout and collect information for multiple building systems onto a single IP network. Beyond sensors and switches informing a standalone lighting control system, a network of security, phone, and other building systems coordinate to make buildings truly connected. PoE lighting can leverage investments in IT infrastructure and deliver greater energy efficiency, particularly in HVAC, plus a more personalized experience for the occupant.

    Adding wattage

    The IEEE 802.3af and 802.3at standards made low-power PoE devices like IP phones, Wi-Fi access points and security cameras possible. Today, more than 25W of 48V dc power brings LED lighting into the field. The upcoming approval of IEEE 802.3bt (or PoE++, expected to be ratified in 2016 or 2017) will allow up to 100W (minus losses) of plug-and-play networking without the strict conduit regulations required for line-voltage installations. IEEE 802.3bt is designed specifically for the IoT, transmitting data and power over all four pairs with a 10 Giabit Ethernet protocol (10GBASE-T).

    “PoE is progressively getting cheaper, and with PoE++ you’re talking about 72 watts: that really changes things,”

    In February, IT powerhouse Cisco launched the Digital Ceiling alliance, along with Philips Lighting, Cree and Eaton, among others. NuLEDs partnered with Cisco in 2012 and has numerous PoE lighting installations across the country. “It’s been a long process, but a very interesting and fun process, to watch this whole ecosystem emerge through the combination of the efficiency increases of LED lighting and the power increases of Ethernet-delivered Cat 5 cabling power,” said Lisa L. Isaacson, chief business development officer at NuLEDs. “There’s even fixtures being developed that are 200 lumens per watt.

    Isaacson explained that NuLEDs often uses four-channel control of RGBW LED arrays to provide tunable white light. “We can tie in with an astronomical timeclock, so we can have an office space or a school space go through a Kelvin shift throughout the day to mimic the circadian rhythm of the outdoor daylight.”

    In addition, networked PoE lighting enables

    Demand side management/load shedding
    Personal controls to set preferred settings, enhancing user satisfaction
    More granular occupancy controls and daylight harvesting
    Highly flexible scheduling
    Positions and connections for a myriad of sensors: temperature, CO2, humidity, seismic, vacancy, methane, video, etc., etc.
    The ability to monitor luminaires to detect outages and operational anomalies
    Measurement and verification (M&V) of energy savings for each luminaire and sensor on the system
    The use of colored light for wayfinding
    The use of colored light to influence purchasing or other behavior
    Visible light communication (VLC) for personalized communications to the occupant (uses a smart device with camera), including wayfinding
    VLC for occupant control of the immediate environment using a smart device
    The use of telemetry and analytics to save energy and optimize space utilization
    Lighting as a service

  16. Tomi Engdahl says:

    An Introduction to NuLEDs PoE Intelligent Lighting


    NuLEDs, Inc. was formed in 2011 by founders with a rich background in low voltage LED lighting and control technology. After debuting in the home automation industry with established partners like Crestron, Savant and Control 4, NuLEDs quickly expanded its control capabilities to include Power-over- Ethernet (PoE).

    In January of 2012, NuLEDs delivered the first PoE lighting system to Cisco that both powered and controlled from the IT network. In a small lab, with a skunk-works team from Cisco, NuLEDs presented a 4-channel PoE lighting system that forever changed the lighting industry.

  17. Tomi Engdahl says:

    U.S. DoE tests concerns about PoE wiring resistance

    One complication that arises out of using Ethernet lines for power is that the cabling must be treated more like conventional power-carrying wire than like data lines. That means the cable dc resistance factors into the installation design more so than if the wires handled just ordinary 5 Gbit/sec Ethernet.

  18. Tomi Engdahl says:

    Connected Lighting Systems
    Efficiency Study
    — PoE Cable
    Energy Losses, Part 1

    DoE researchers concluded that energy lost in the cable stays below 5% of the total load in PoE lighting applications so long as the average cable length doesn’t exceed 50 m.

  19. Tomi Engdahl says:

    IoT could owe further advances to Power-over-Ethernet cabling

    By Lee Teschler | February 27, 2018
    Updated PoE specs let significant amounts of power flow down networking cables, so much that Ethernet wiring now can double as a power delivery system.

  20. Tomi Engdahl says:

    Virgin Media samples standard electrical wires for IoT lighting at technical center

    The pilot powerline communications deployment by enModus serves a strong reminder that existing cables can serve double duty and slash energy costs.

    British broadband and cable provider Virgin Media is sampling the use of standard electrical wires to transport data to and from luminaires in order to control lux levels and collect information about facility usage at a technical center. The small powerline communications (PLC) trial has cut lighting-related energy costs by 99%, according the PLC provider, enModus.

    Chepstow, Wales-based enModus replaced a number of fluorescent lights with LED luminaires from Thorn and tied them into enModus’ Wattwave control system that delivers commands from a central hub to the lights, each of which is outfitted with an enModus node.

    The hub also connects via the Internet to an enModus cloud computing system based on Microsoft Azure, which helps to analyze lighting use and which sends back adjustments to the controls. In addition to lighting information, the lights deliver occupancy information — picked up from embedded PIR sensors — which the cloud system examines to help facility operators make better use of their space.

    Virgin switched on the new system in July in a small retrofit which could lead to a complete retrofit of the facility and others in the Virgin orbit. The job was led by electrical contractor Richardson Electrical of Leeds, England.

    Unlike another wired form of smart lighting, Power over Ethernet (PoE), PLC makes use of the existing electrical wiring that supplies the lights. PoE runs both data and electricity over the Ethernet cables that are traditionally associated with data. The common wisdom is that PoE makes more financial sense in new builds, which by definition call for new wiring of some sort, than it does in retrofits.

    Both PLC and PoE technology can also deliver data to devices other than lights, providing rounded Internet of Things (IoT) connectivity. They are both competing with a variety of wireless approaches, such as Bluetooth Mesh.

  21. Tomi Engdahl says:

    Growing the IoT means higher power to PoE

    At APEC today, Silicon Labs showed off their two new power over Ethernet (PoE) powered device (PD) families, Si3406x and Si3404. These devices are designed with high integration and efficiency to serve a broad range of IoT applications.

    These families have all necessary high-voltage discrete components on a single PD chip; the solutions support IEEE 802.3 at PoE+ power capabilities, have flexible power conversion options with more than 90 % efficiency, sleep/wake/LED support modes, and excellent EMI immunity.

    I spoke to John Wilson, senior manager of PoE Products at Silicon Labs, about the new PD developments that are being demonstrated at APEC this year. 2018 will be a big year for PoE because the next generation of the standard is expected to be ratified by the IEEE committee around June or July. This new standard will raise the power levels to 100W, which will be paramount for the lighting market.

    Cameras, in security and surveillance, are growing more than 20% year-on-year; wireless access points at 15% year-on-year (feature-rich video IP phones, public hot spots, advanced 802.11 wireless access points, and smart home appliances)

    Design engineers like more integrated solutions of such devices with good power conversion efficiency and Silicon Labs excels in those areas. Legacy products have high voltage on chip like transient voltage suppressors, input diode bridges, and power MOSFETs enabling direct connection to an Ethernet RJ-45 connector. Along with this, the company has raised their power conversion efficiency from a legacy 70% to 90% with these new ICs, which also support isolation. EMI has also been vastly improved to allow quicker time-to-market.


  22. Tomi Engdahl says:

    AAEON’s VPC-5600S opens up new horizons for NVR technology

    AAEON launches the VPC-5600S, a network video recorder (NVR) with a possible eight PoE ports, each supported by their own LAN chips.

    The VPC-5600S recently picked up coveted COMPUTEX d&i and Taiwan Excellence Awards, and AAEON network security division product manager Josh Chen has labelled it “the perfect surveillance system.” AAEON is currently the only company to offer NVRs featuring eight PoE ports with individual LAN chips. With this hardware specification and the device’s 7th Generation Intel® Core™ processor, users will receive the highest quality images from multiple sources without any danger of data loss. With an additional four USB3.0 ports and two LAN ports, the VPC-5600S can support up to 14 high-grade surveillance cameras.

  23. Tomi Engdahl says:

    Long reach 2- or 4-pair UTP PoE extender kits boast robust design

    The FLEX-Base unit is connected to the downlink port of any standard PoE switch and can extend Ethernet (100Mbps) and PoE (up to 50W) over 2- or 4-pair UTP with 2,000ft (610m) reach. At the endpoint location, users connect the FLEX-Link or FLEX4 Adapter to the extended cable run and 1 to 4 IP endpoints on the other end making long reach PoE quick, easy and cost-effective.


  24. Tomi Engdahl says:

    Distance, wattage considerations drive power decisions

    By definition, Power over Ethernet (PoE) is a system that passes electric power along with data over cabling. Traditionally, this has been done over an unshielded twisted-pair (UTP) cabling system. It may seem simple in concept, but the execution has not been without challenges.

  25. Tomi Engdahl says:

    Improving the Power over Ethernet experience

    Multi-vendor interoperability is the hallmark of Ethernet. Some may talk about Ethernet’s plug-and-play capability, or low cost, but the simple reality is that neither of these happens without multi-vendor interoperability.

    PoE is truly more than a common marketing term. It is more than simply hooking up two devices, where one device, referred to as the power source equipment (PSE) provides power over the Ethernet cable to another device, known as the powered device (PD), which uses the provided power. These devices must be designed to talk to each other using the right power levels in order to interoperate. And when these devices aren’t designed to the same specification, interoperability issues occur and everyone pays the price. Users become frustrated, and the solution providers must spend time and resources troubleshooting the problem. Everyone loses. The use of the terminology “Power-over-Ethernet” or “PoE,” is simply insufficient to distinguish products based on the PoE specifications in the IEEE 802.3 Ethernet standard from proprietary (AKA “non-standard”) power delivery implementations.

    How big of a problem is this? According to industry analyst Dell’Oro, over the next five years, 800 million PoE-enabled PSE switch ports will be deployed with hundreds of millions of powered PD devices being sold. In the past PoE was used for IP phones, cameras, and wireless access points. However, with the advent of the Internet of Things (IoT), the potential applications for PoE are only limited by the imagination of the engineer. We are seeing lighting, digital signage, point of sale/card readers, whiteboards, smoke detection, and other types of sensors and controls as potential PoE applications. Given the myriad of applications and devices, as well as the current 4 different power classes available, it has become imperative for the Ethernet industry to provide end-users with a simple tool to distinguish PoE products based on the IEEE 802.3 Ethernet standard from those products that use proprietary power-delivery implementations.

  26. Tomi Engdahl says:

    Transition Networks adds hardened Gigabit Ethernet PoE++ managed switch with multi-wireless capabilities, targeting surveillance, lighting, digital signage systems

    Transition Networks, Inc. this month announced its new 4+1 port Managed Hardened Gigabit Ethernet Power-over-Ethernet ++ (PoE++) IEEE 802.3bt (Draft) compliant Switch (SESPM1040-541LT-xx Series) with wireless capabilities for network extension and simplified network installations. The new managed switch is self-enclosed in a NEMA 4X/IP-66 rated enclosure for use in harsh outdoor environments and can be mounted directly on a wall, pole, or the side of a building. “This self-contained switch and enclosure reduces the time, expense, and other challenges associated with city permit requirements, approvals, installation and access to equipment in traditional cabinet applications,” asserts the company.

    According to Transition Networks: “The SESPM1040-541-LT-xx Series is a Layer 2 switch with (4) 10/100/1000Base-T PoE++ ports and (1) combination 10/100/1000Base-T RJ-45 or 100/1000Base-X SFP port (additional port options available). Each port offers 6KV surge protection against lightning or other surges in current, and additional fuse protection safeguards against unintentional intrusion from outside power lines eliminating the need for external circuit cross protection. The SESPM1040-541-LT-xx Series also includes Bluetooth Low Energy (BLE) connectivity to allow remote access for configuring, monitoring, or troubleshooting switches that are installed in high places where access would require a ladder or lift.

  27. Tomi Engdahl says:

    Cable and connector technology for supporting remote powering

    It takes more than just thicker wire to support next-generation Power over Ethernet.

    The combination of standards, codes, and best practices for remotely powering network devices presents significant challenges for user organizations as well as system specifiers, designers, and installers. Recently developed standards and codes have sought to address the means of most-effectively and most-safely deploying twisted-pair cabling to support remote powering. At the same time, manufacturers of cable and connectivity have done their own development, to offer cabling components that are up to the task.

    Today, the material composition of a twisted-pair cable intended to support remote powering is different in several ways from the material composition of components solely intended to support 10/100/1000Base-T. Similarly, the design and composition of a connector—particularly a jack—that will support remote powering incorporates engineering that did not need to be considered for gig-speed support.

    In a technical paper published in 2015 titled “Power over Ethernet with Panduit Copper Cabling,” Panduit explained, “Cables and connectors, by themselves, can handle the 960 mA current and 71W of power [anticipated to be specified in IEEE 802.3bt]. The concerns with running PoE in cables has to do with heat and temperature rise that occur when the cables are bundled, and the concern with connectors is arcing that occurs when a plug is removed from a connector with live PoE.”

    The paper also explains, “An electrical arc (spark) naturally occurs most times when removing a plug from a jack with PoE running. The arc poses no danger to the user, and it is often difficult to notice. However, it can damage the points on the jack and plug contacts where it occurs. Connectors must be designed so the location damaged by the arc is not where the plug and jack mate. The IEC developed test methods IEC 60512-9-3 and IEC 60512-99-001 to address this particular issue.” The paper stated that Panduit’s plugs and jacks are designed to pass both test methods “to ensure that when arcing occurs, it will not damage the critical plug and jack mating point.”

    While the level of current associated with the arc poses no risk to humans, the arcing creates an electrical breakdown of gases in the surrounding environment that erodes the plated jack-plug contact surfaces at the arcing location.

    “When spark gap erosion occurs in the area of the fully mated position on an RJ-45 connector, the result is an unreliable connection due to the contact surface damage. This can cause degraded network performance and increase bit error rates.

    TSB-184-A also explains that thermal dissipation—the dissipation of heat in cable bundles—can be improved if users select cables with several physical characteristics, including: improved thermal conductivity, improved heat transfer coefficient between cable materials, improved heat transfer coefficient between cable jacket and air, metallic elements such as a shield or screen, and a larger diameter.

    Over the course of a year, Superior Essex introduced two cables that were engineered to support high levels of remote powering. It debuted the PowerWise Category 5e Cable, for PoE applications in September 2015 and the PowerWise I/O 1 Gigabit 4PPoE CRM/CMX Cables for indoor/outdoor PoE applications in September 2016. At the time of the 2015 introduction, the company explained the PowerWise Category 5e achieves 88-percent power efficiency for 802.3at and future 802.3bt applications. “This improved power efficiency is due to the fact that 22-gauge copper wires are 59 percent larger than the 24-gauge copper wires typically used in Category 5e cables.”

    Deploying a balanced twisted-pair copper cabling system that will be able to support the delivery of remote power at IEEE 802.3bt-specified levels requires thoughtful preparation at every step. It involves the product design and engineering steps taken by manufacturers, the specification of appropriate products with sufficient capabilities, the design and installation of cable runs including bundling considerations, testing of the installed circuits—and that’s not to mention user-specific needs and preferences.

  28. Tomi Engdahl says:

    Increasing penetration of PoE a major driver of industrial communication cables market: Analyst

    Technavio’s latest market research report on the global industrial communication cables market provides an analysis of the most important emerging trends expected to impact the market’s outlook from 2018-2022. The firm defines an “emerging trend” as a factor that has the potential to significantly impact the market and contribute to its growth or decline. According to Technavio’s analysts, the global industrial communication cables market will grow at a compound annual growth rate (CAGR) of more than 12 percent during the forecast period.

    The increasing penetration of Power over Ethernet (PoE) is cited as a major factor driving the market’s growth. Per the report, “Power over Ethernet enables a single 8-wire cable to transmit data and direct current. PoE is used as an essential power feature of a network switch, or via peripheral devices, installed between the switch and the physical devices in the network. The adoption of PoE in industrial facilities has proven to be economical for the end-user while increasing the connectivity strength. PoE also allows physical devices to be easily configured within a network.”


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