CommScope PFU-P-C-O-060-02, Руководство по оборудованию

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Two Port PoE Extender Hardware Manual
This product is copyright © 2017 CommScope, LLC. All Rights Reserved. 9
1. Introduction
The PoE Extender is a component of CommScope
®
’s powered fiber cable system, a hybrid optical
fiber/copper cable system for remote powering of network access devices. It is designed to simply
and easily function with the powered fiber cable system to extend the distance of PoE (Power over
Ethernet) enabled devices. The PoE Extender encompasses four primary elements:
1.
Environmentally sealed closure
2.
Electrical power management
3.
Circuit protection electronics
4.
Optical to electrical Media Conversion
When coupled with any standard NEC Class II 48V DC power supply CommScope’s Powered
Fiber Cable system can power and communicate with PoE standard devices at far greater
distances than "category style" copper cabling systems which are typically limited to 90 meters,
and still meet NEC Class II and SELV standards, eliminating the need for qualified electricians
during installation.
The PoE Extender also contains circuit protection and DC/DC conversion electronics which
automatically condition electrical voltage to the correct level needed for PoE input to the device
under load (such as a small cell, high definition security camera, Wi-Fi hot spot, etc).
Why Protect Remotely Powered Circuits?
Long length DC low voltage electrical systems are at increased risk of:
•
AC cross from high voltage cables
•
Higher current in the event of a short circuit
•
Strong electrical surges due to lightning strikes or other EM events in close vicinity
The PoE Extender provides two levels of electrical protection:
5.
Primary Protection:
•
Metal oxide varistors - operates for slower surges as well as fast surges
•
Protects both differential and common mode
•
MOV components rated to 4.5kA
6.
Secondary Protection:
•
Transient voltage suppressors - works at relatively low/slow surges, adds an extra
layer of protection against voltage spikes
•
Protects differential mode only
•
Prevents the voltage from rising above 80-100V