APC IP DSLAM User's Guide Page 60

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EDA 1200 System Overview
where telecom equipment is located close to the End-user and requires power.
The remote powering is independent from local power utilities and centralized
back-up systems (batteries). The system consists of a Central Office Remote
Power System and a remote-end converter, and is an OAM product. The
system consists of a CO System and a Remote-end converter.
CO Flat pack Remote Power Systems
The power system consists of a 2HU Flat pack Mini
PRS chassis, 19” or 21” (ETSI) wide. This chassis
houses up to two DC/DC converters and VA limiters.
The DC/DC converter is a 1500-watt step up
converter which provides ±190 V DC from a
traditional –48 V DC source.
The VA limiter distributes the ±190 V DC and provides
a safe power distribution over existing twisted pairs,
protecting the Remote Feeding Circuits (RFT) from
over-voltage, over-current, and leakage current to
ground. The VA limiter has 12 individual outputs of
up to 100 W each (RFT-V).
Remote-end converter
The remote-end converter consists of parallel DC/DC
converters that terminate the twisted pairs being fed
from the CO. The converter incorporates high-energy
surge protection and is specifically designed to work
from a limited power source (VA limiter) fed over a
high-impedance line. The modules can be paralleled
to meet the power requirement at the remote end.
4.6 Converters
This section briefly describes the converters in the EDA 1200 portfolio.
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