User Manual

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Table Of Contents

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

Page 2-10

©

2002,

ADC

Telecommunications,

Inc.

current

to

maintain

the

battery

charge

level.

During

an

AC

power

outage,

the

battery

provides

DC

power

to

the

STM

to

maintain

system

operation.

The

battery

can

maintain

operation

of

the

RU

for

approximately

1

hour

at

50

Watts.

3.8 Ventilation

Vent

openings

are

provided

in

the

door

and

the

rear

side

of

the

RU

cabinet

to

permit

air

exchange

for

cooling.

Air

enters

the

enclosure

through

the

opening

in

the

door.

A

filter

on

the

inside

of

the

door

removes

dirt

particles

so

that

only

clean

air

enters

the

enclosure.

Both

modules

have

cooling

fans.

The

STM

has

a

rear

mounted

fan

that

pulls

air

through

the

module

and

exhausts

it

toward

the

rear

of

the

enclosure.

The

heated

air

exits

through

an

opening

in

the

rear

side

of

the

enclosure.

The

LPA

works

in

a

similar

manner

except

it

also

has

a

fan

on

the

front

to

help

draw

air

into

the

module.

3.9 User Interface

The

RU

cabinet

user

interface

consists

of

the

various

connectors,

fittings,

outlets,

and

switches

that

are

provided

on

both

the

interior

and

exterior

of

the

enclosure.

The

RU

cabinet

user

interface

points

are

described

in

Table 2-2

and

indicated

in

Figure 2-4.

Table 2-2. Remote Unit Cabinet User Interface

REF

NO

DEVICE FUNCTIONAL DESCRIPTION

1Air

inlet

filter A

reusable

filter

that

prevents

the

entry

of

dirt

particles

when

out-

side

air

is

pulled

into

the

cabinet

for

cooling.

2AC

power

cord Provides

AC

power

to

the

STM.

3 Circuit

breaker

reset

switch Used

to

reset

the

battery

heater

circuit

following

correction

of

an

overcurrent

condition.

4Door

switch Indicates

to

the

fault

detection

and

alarm

reporting

system

if

the

cabinet

door

is

open

(major

alarm)

or

closed.

5 Module

mounting

shelf Provides

a

mounting

point

for

the

STM

and

LPA

modules.

6Battery

tray Provides

a

mounting

point

for

the

back-up

battery

(when

used).

7120

Va c

GFCI

outlet

(standard)

Standard

120

Va c

GFCI

outlet

for

connecting

AC

power

tools

or

test

equipment.

8Fiber

slack

spool Provides

a

storage

place

for

excess

fiber

pigtail

slack.

9 Lightning

protector Provides

lightning

surge

protection

for

the

antenna

connection.

10 Fiber

cable

connector Provides

both

an

entry

point

and

strain

relief

for

the

fiber

optic

cable.

11 3/4-inch

NPT

threaded

hole Provides

a

connection

point

for

a

3/4-inch

AC

conduit

fitting.

12 Grounding

lug Provides

a

connection

point

for

an

external

grounding

cable.