User Manual

ADCP-75-126 • Issue B • April 2002 • Section 1: Overview
Page 1-7
© 2002, ADC Telecommunications, Inc.
3.4 Powering
The HU is powered by ±24 or ±48 Vdc and must be hard-wired to a local office battery power
source through a fuse panel. The RU is powered by 120 or 240 Vac (50 or 60 Hz) and must be
hard-wired to the AC power source through a 20 Amp breaker box. The RU is pre-wired for 120
Vac operation but can be converted to 240 Vac operation if required. The RU is equipped with a
surge protector to prevent equipment damage from AC power spikes and a lighting protector to
prevent equipment damage from lighting surges. A 120 Vac outlet is provided within the RU
cabinet for powering for test equipment or power tools. On an optional basis, a back-up battery
kit is available for the RU. The battery-backup system powers the RU if the AC power source is
disconnected or fails.
3.5 Equipment Mounting and Configuration
The HU is designed for mounting in a non-condensing indoor environment such as inside a
wiring closet or within an environmentally-controlled cabinet. The HU is intended for rack-
mount applications and may mounted in either a 19- or 23-inch WECO or EIA equipment rack,
usually within 20 feet of the BTS.
The RU is designed for mounting in either an indoor or outdoor environment. The RU consists
of a Spectrum Transport Module (STM), a Linear Power Amplifier (LPA) module, and a self-
contained cabinet which houses the modular components and protects them from the elements.
The RU cabinet is weather-tight but contact with salt-air mist should be avoided as it may
degrade the MTBF of the product. The cabinet can be mounted from a flat-vertical surface or
from a utility pole (requires pole-mount kit). Slots are provided within the cabinet for mounting
the STM and LPA modules. A storage spool is provided for storing short lengths of excess fiber
slack. A bracket is provided for mounting a WDM module (accessory item). A tray with a
heated base is provided for mounting the back-up battery (accessory item).