User Manual

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Table Of Contents

ADCP-75-126 • Issue B • April 2002 • Section 2: Description

Page 2-8

©

2002,

ADC

Telecommunications,

Inc.

3.1 Primary Components

The

RU

cabinet

consists

of

the

enclosure,

a

mounting

shelf

for

the

STM

and

LPA

modules,

an

AC

power

interface,

a

lightning

protector,

a

mounting

shelf

for

the

back-up

battery

accessory,

a

fiber

storage

spool,

and

a

mounting

bracket

for

the

WDM

accessory.

The

RU

cabinet

is

designed

for

use

in

either

an

outdoor

or

indoor

environment.

Opening

the

hinged

door

provides

full

height

and

width

access

to

the

interior

of

the

enclosure

to

facilitate

module

and

cable

installation.

The

enclosure

is

constructed

of

heavy

gauge

aluminum

and

is

painted

putty

white

for

corrosion

protection.

Connection

and

entry

points

are

provided

in

the

bottom

of

the

enclosure

for

the

antenna

coaxial

cable,

fiber

optic

cable,

and

AC

power

cable.

Vent

openings

are

provided

in

the

door

and

the

rear

side

of

the

enclosure

to

permit

air

exchange

for

cooling.

The

RU

cabinet

is

weather-tight

but

contact

with

salt-air

mist

should

be

avoided

as

it

may

degrade

the

Mean

Time

Between

Failure

(MTBF)

of

the

product.

Drain

holes

in

the

bottom

of

the

cabinet

allow

any

moisture

that

does

enter

the

cabinet

to

drain

out.

The

cabinet

door

is

equipped

with

a

sturdy

latch

so

that

the

enclosure

may

be

padlocked

to

prevent

unauthorized

entry.

A

door

open

switch

is

provided

so

that

a

major

alarm

is

generated

whenever

the

cabinet

door

is

opened.

3.2 Mounting

The

RU

cabinet

may

be

mounted

on

a

flat

vertical

surface

(such

as

the

side

of

building)

or

on

a

utility

pole.

A

special

mounting

bracket

is

provided

with

each

enclosure.

Installation

consists

of

securing

the

bracket

to

the

mounting

surface

and

then

hanging

the

enclosure

from

the

bracket.

The

mounting

bracket

may

be

attached

to

a

variety

of

surfaces

such

as

wood,

concrete,

or

masonry.

Various

fasteners

including

hex-head

capscrews,

tee-nuts,

and

concrete

anchors

are

provided.

A

separate

pole-mounting

kit

(accessory

item)

is

available

for

attaching

the

mounting

bracket

to

a

utility

pole.

3.3 Module Installation

A

mounting

shelf

is

provided

within

the

RU

cabinet

for

installing

the

STM

and

LPA

modules.

The

mounting

shelf

includes

tracks

that

guide

each

module

into

the

installed

position.

Separate

mounting

locations

are

provided

for

each

type

of

module.

Two

D-sub

connectors

(one

male,

one

female)

are

located

at

the

rear

of

the

mounting

shelf.

Each

mounting

shelf

connector

mates

with

a

corresponding

D-sub

connector

located

on

the

rear

side

of

each

module.

A

wiring

harness

links

the

mounting

shelf

connectors

together.

The

connectors

and

the

attached

wiring

harness

provide

the

electrical

interface

between

the

STM

and

LPA

modules.

The

modules

are

held

in

the

installed

position

with

captive

screws.

3.4 Fiber Optic Cable Entry

A

plastic

cord

connector

is

provided

in

the

exterior

bottom

side

of

the

RU

cabinet

for

routing

a

fiber

optic

cable

into

the

enclosure.

The

cord

connector

provides

cable

strain

relief

and

a

watertight

seal

at

the

fiber

optic

cable

entry

point.

As

the

connector

nut

is

tightened,

a

soft

neoprene

bushing

compresses

to

tightly

grip

the

cable

without

applying

excessive

force

to

the

fibers.

The

cord

connector

can

accommodate

cables

that

range

from

0.375

to

0.875

inches

(10

to