This blog builds upon the recent Intro to PoE & How It Can Help Your Industrial Network post and looks at some choices in building an industrial Ethernet network that supports PoE.
PoE is having important repercussions for industrial applications. The simplicity of combining signal and power in one Ethernet cable connection contributes to the already-rapid transition to Ethernet-based industrial control systems. Wireless access devices, IP phones, surveillance cameras, and a growing number of specialty devices are available, demonstrating how PoE can help solve industrial information and control systems applications problems in innovative ways. PoE industrial sensor and controller devices are now available. While the available power in a PoE-connected device is generally limited to about 13 watts, the vast majority of modern industrial sensors take less than 10 watts. It may soon be possible to power a full SCADA system from ports on Ethernet switches, along with non-traditional devices such as phones and cameras and PCs. PoE offers the potential for an economical standards-based high-performance industrial network far beyond what is available today. Read more
To save costs in the planning, wiring and installation of networks, the Power over Ethernet (PoE) process was developed and standardized under IEEE 802.3af. Just as its name suggests, devices that support PoE such as video cameras, access control devices, and VoIP phones are supplied with power directly via the data cable. No additional electrical wiring is needed! PoE makes the network planning flexible and independent of switch cabinets and sockets. There are no extra costs for the electricity and telephone network (VoIP) wiring.
Traditional power lines supplying AC power simply are not always practical. Networked cameras and access control devices are often located in places where traditional power outlets and cabling are difficult to install or simply unavailable. PoE simplifies the installation and operation, keeping the cabling secure while not interfering with the network operation. Read more
The International Security Conference (ISC) took place March 28 through 30 at the Sands Convention Center in Las Vegas. Over 900 companies exhibited at the show. Belden’s GarrettCom brand exhibited and represented Belden’s Industrial Solutions Division in the booth.
PoE (Power over Ethernet) was a key area of booth focus in terms of products displayed as well as the booth’s main theme. PoE has come a long way since GarrettCom started exhibiting about five years ago at ISC. On display in the GarrettCom booth was a full breadth of PoE switches as well as hardened switches and routers. A large display board of Belden industrial cables was also prominent and generated quite a bit of interest. When GarrettCom first started exhibiting at the ISC West Show, the booth personnel had to explain the basic concepts of what PoE was and how a PoE switch worked. This year, PoE was everywhere. Solutions for standard 802.3af PoE, 802.3at PoE+, and beyond were shown and discussed. Read more