User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance Indoor Coverage Solution System

ADCP-75-136 • Issue 1 • November 2002

Page 18

©

2002,

ADC

Telecommunications,

Inc.

For

wall-mount

applications

of

the

DHU

or

DEU,

a

pair

of

holes

is

provided

in

the

cable

management

tray

that

allows

the

unit

to

be

mounted

on

any

flat

vertical

surface.

The

mounting

holes

are

spaced

11-21/32

inches

(296

mm)

apart.

The

DHU/DEU

should

be

oriented

so

the

front

panel

faces

up

when

mounted.

Appropriate

fasteners

for

wall

mounting

must

be

provided

by

the

installer.

It

is

recommended

that

a

backer

board

such

as

3/4-inch

plywood

be

installed

over

the

mounting

surface

to

provide

a

secure

base

for

attaching

the

DHU

or

DEU.

The

DHU

and

DEU

should

be

mounted

in

a

non-condensing

indoor

environment

such

as

inside

a

wiring

closet

or

within

an

environmentally

controlled

cabinet.

All

controls,

connectors,

and

indicators

are

mounted

on

the

front

panel.

All

cables

should

be

routed

to

the

front

panel

for

connection.

Cable

retainers

provided

on

the

cable

management

tray

for

securing

the

fiber

optic,

DC

power,

and

external

alarm

system

cables.

The

maximum

recommended

ambient

temperature

for

the

DHU

and

DEU

is

50º

C

(122º

F).

Sufficient

space

for

air

circulation

should

be

provided

between

each

unit

when

installed

in

a

multi-unit

rack

assembly

because

the

operating

ambient

temperature

of

the

rack

environment

might

be

greater

than

room

ambient.

A

minimum

clearance

of

3

inches

(76

mm)

should

be

provided

on

both

the

left

and

right

sides

of

the

unit

for

air

intake

and

exhaust.

Refer

to

Figure

2

for

the

DHU

dimensions

and

Figure

6

for

the

DEU

dimensions.

3.2.2 DRU Location and Mounting Requirements

The

DRU

must

be

installed

in

a

non-condensing

indoor

environment

and

may

be

wall-

mounted

or

ceiling-mounted.

The

DRU

may

also

be

installed

in

spaces

used

for

environmental

air

such

as

the

space

over

a

suspended

ceiling

or

beneath

a

raised

floor.

The

DRU

is

equipped

with

four

integral

mounting

feet

that

allow

it

to

be

fastened

to

any

flat

vertical

or

horizontal

surface.

Holes

are

provided

in

the

mounting

feet

for

inserting

fasteners.

Appropriate

fasteners

for

securing

the

DRU

to

the

selected

mounting

surface

must

be

provided

by

the

installer.

The

DC

power

cable

and

optical

fibers

should

be

routed

to

the

DRU

front

panel

for

connection.

The

antenna

coaxial

cable

should

be

routed

to

the

DRU

rear

panel

for

connection.

A

minimum

of

3

inches

(76

mm)

of

clearance

space

should

be

provided

on

all

sides

of

the

DRU

(except

the

bottom)

to

ensure

there

is

adequate

air

circulation

for

cooling.

In

addition,

at

least

one

surface

of

the

DRU

installation

area

must

be

open

to

the

interior

of

the

building.

If

a

portable/flexible

antenna

will

be

installed,

a

minimum

of

9

inches

(229

mm)

clearance

should

be

allowed

along

the

surface

with

the

antenna.

Refer

to

Figure

4

for

the

DRU

dimensions.

3.3 Powering Requirements

3.3.1 DHU and DEU Powering

The

DHU

and

DEU

are

powered

by

120–240

Vac

(50–60

Hz)

which

is

supplied

through

a

standard

three-conductor

AC

power

cord.

The

120

Vac

power

cord

is

provided

with

the

unit

and

is

98

inches

(2.5

m)

long.

Both

the

DHU

and

the

DEU

have

a

current

rating

of

2.0

Amps

at

120

Vac

input.

Each

unit

should

be

located

so

that

an

AC

outlet

is

within

the

reach

of

the

power

cord.