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IP Video and Power over Ethernet Technology

IP Video and Power over Ethernet Technology

IEEE 802.3af = Power over Ethernet (PoE) specification

~The ability of a device to transmit power as well as data on the UTP cabling link to an end device (15.4 watts)

~Typical end devices are IP cameras, wireless access points and IP phones

IEEE 802.3at = Power over Ethernet Plus (PoE+) specification

~24 Watts

~More power for devices like PTZ IP Cameras

~Backwards compatible with 802.3af equipment

 

Power over Ethernet Technology Enables IP Video

~PoE greatly simplifies camera installation and is a huge benefit to IP network camera installations vs. analog equivalent

~No need for an electrician to install power receptacle in a difficult location

~Saves time and cost

~Most IP cameras can be Powered Devices (PD) using PoE technology

~Switches can be Power Sourcing Equipment (PSE)

~PoE Injectors (also known as Midspan PSEs) simply insert power onto a CAT 5 Ethernet cable, without affecting the data.

~Media Converters can be Power Sourcing Equipment (PSE)

~PoE Media Converters, in addition to PoE Injectors, allow the addition of PoE capability to existing CAT 5 Networks while also converting from Fiber.

 

Typical IP Video System w/ PoE switch

图片7.jpg

100 meter (328ft) distance limitation

on all UTP cabling runs


Typical IP Video System w/ PoE Injectors

图片8.jpg

100 meter (328ft) distance limitation

on all UTP cabling runs still applies


Fiber Cabling and PoE

Can the benefits of fiber be realized while still taking advantage of PoE?

PoE media converters can provide the data link as well as inject the power onto the UTP interface to the camera, while providing the fiber link back to the central location

 

Fiber Integration in IP Video Networks

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Outdoor Applications

~Typical temperature requirements: -40 to +75 degrees C

~Enclosure mounting with no temperature control

~Typically 100 –230 VAC or 24 to 48 VDC

~Serial interfaces most common today: RS232/422/485

~E.g. NEMA-TS2 for Traffic Control

*Operating Temperature: -34 to +74 C

*Emissions Class A

*Transient voltage suppression and immunity higher than for office-grade equipment

~Meet the above requirements with Industrial Ethernet products

 

What is Industrial Ethernet?

Industrial Ethernet

~Generic term to cover communications within non-office open-architecture environments

~Environment will be customer specific

Three Broad Environment Classifications:

~Factory Environments

~Outdoor (e.g. Ethernet / Traffic Control)

~ Lite”, or extended temperature

 

Major Characteristics of Industrial Ethernet

~DIN rail mounting

~Extended operating temperature range

~Designed for passive cooling (Fan-less)

~Rugged design, especially the case

~Rugged connectors in addition to RJ-45 (e.g. M12)

~Higher Ingress Protection rating to protect from dust / moisture

~Edge-based (where the devices are)

~Very long deployment lifetimes requiring higher reliability









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