Elenco Electronics MO-1251 Manual de usuario descargar pdf (Pagina 39)

100

an older house

with

a thick door

trim,

or if the door has

sagged,

there

might

no way to locate the switch and its

magnet

within

their

working

separa-

tion distance.

In that case, use the

long magnetic switch

shown. Al-

though it's almost twice the cost

of the

smaller conventional

switch, it can

work within five inches of

its magnet.

The one from

Radio

Shack

is supplied

with several thick spacers that

can

resolve just about any

mounting prob-

lem you may come across.

If you have

included

any

interior

doors such as closets in the

alarm

loop, you might want some

way

bypass one or more so that you can

move around the

house freely, yet still

have the alarm

turned on. Or you

might

want

to bypass

the back door,

yet keep the rest

of the house pro-

tected.

Either way, it's done

with

switch assembly which is

wired

shown in Fig. 13. Just remember

that

the switch's on position means that

the bypass is

what's on.

A tiny 12 -volt buzzer can be

wired

near the door as a pre-alarm

to remind

anyone entering

that the alarm is

and must be turned off before

the

time -out elapses (up to

45 seconds). It

is a

decided asset, because it helps

avoid

waking the neighborhood

you

come home late at

night too tired to

remember to turn off the alarm.

Keypad entry

As shown in Fig. 14, the

pre-alarm

buzzer can be

mounted with

two

sided foam tape directly below a Ra-

dio Shack keypad

entry

switch; and

you

should

certainly consider using

keypad switch

that is located adjacent

to the entry door. The switch has

LED's that indicate when the loop is

ready (green), and when

the system

armed (red). The

user selects and can

change the code at any time. If some-

thing goes wrong with

the switch or

the system, unlike other keypad

switches

that lock out -leaving the

user

frantically

searching for the con-

trol center's key

that

will

turn

off

the

alarm

-the

Radio Shack unit defaults

to a factory code. The

combination

the * and

keys is also a panic

switch.

Unfortunately, Radio Shack does

not sell

surface- mounting

box

for

the

keyswitch.

Their mounting box

requires that

you chop a

relatively

large mounting hole in

the

wall; wir-

ing inside

the

wall

might prove diffi-

cult, and the landlord might not be

OTHER

SENSORS

SEPIES

LOOP

SWITCH

MAGNET

DOOR

WINDOW

BYPASS

SWITCH

FIG.

3 -THIS IS HOW

bypass

switch is

connected

to a door

"bug."

.a^a

FIG. 14 -IF YOU USE

A KEYPAD entry

switch,

you can tape

the

pre -alarm

buzzer

to the bottom of

the switch's surface

mounting box.

FIG. 15-A

STROBE

LIGHT mounted

the front of the house instantly tells the

neighbors

and

the

police

that it's

alarm that's

wailing.

your

FIG. 16-THE

LAST STEP is to install

the

backup

battery and

connect

the

AC power.

all went well, the

green loop light will

turn on and the

siren will

sound

when you

press

the test

switch.

thrilled at

the prospect of your moving

and leaving

a gaping hole behind.

Use

a surface- mounting

box instead, such

as a plastic

or a metal Wiremold

box

from your local electrical

-parts

store.

When your keypad switch is

com-

pleted,

you can

simply

enter your

code, then take up to 45 seconds

get out the

door.

The

system arms

long after you have safely

passed

through

the door. Same thing on

en-

try. You

enter, hear the buzzer, and get

up to 45

seconds to punch in the code

that turns off

the alarm. Any attempt

to tamper with

the keypad triggers

internal switch

that sets off the alarm.

Figure 15 shows

strobe

light

that

is mounted on the front of the house.

answers the question

"Whose alarm

is ringing ?"

flashing when the si-

ren

(or bell) goes

off

-so

anyone

within

earshot knows instantly

whose

home is under attack. Put the

strobe

light out in

the

open, as conspicuous

as is possible. Make certain that it's

not screened by one or more tall or

leafy trees.

Finally, as shown in Fig. 16, con-

nect the AC

power

and install the

backup

batteries.

all

went well,

the

siren should sound, and the strobe

should flash when you

press

the TEST

switch.

A wireless

system

Installing a

wireless system

isn't

all

that

different from

wired

system,

with

one major exception: You don't

have

to drill holes for fishing

wires

through walls

and ceilings.

Because

of that, installation is usually much

quicker. However, the considerations

for mounting sensors and the like re-

main very

much the same.

The

basic Dicon 9000 package that

chose for our sample installation

(Fig.

17) consists of a base unit, two

remote

door

/window

sensors

with

transmitters,

and an emergency

speaker /siren.

The sugested retail

price for the system is

under

$700.

Available accessories include

emer-

gency pendants, smoke

detectors,

temperature sensors, flood sensors,

remote keypads, and motion detec-

tors.

The 9000

is a

sophisticated system

with

to four security zones; it

can

dial up to

eight

telephone

numbers to

report an emergency,

and

can dial

them in

any order depending

the

emergency. For example, in

medical

emergency,

you

would want

your doc-

tor to be

called before the fire depart-

ment, yet

during a fire emergency,

your

doctor is the last person

you'd

want

to call- unless he lives next

door. Along with

voice-

synthesized

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