Elenco Electronics MO-1251 Bedienungsanleitung PDF herunterladen (Seite 37)

100

also

shows

the condition of the back-

up battery.

There are front -panel switches for

testing the battery and the alarm siren

or bell. In our system we

choose to

use a 2 -tone

siren

-a "wailer " -be-

cause it is supplied in a low -cost

"package" deal, and because in cer-

tain localities

the houses and apart-

ments must have a fire alarm that

sounds

a bell.

While

a bell can be

either a fire or

a burglar alarm, a

wail-

ing siren is always recognized

burglar alarm, or a panic or a medi-

cal- transmitter call for assistance.

Take note

that there are two

ver-

sions of

the control center, and both

use

the 49

-450 stock number. The

older

version's

battery backup is indi-

vidual

alkaline or Ni -Cd

cells.

The

new version's

backup battery is two

series- connected 6 -volt rechargeable

gel -cells that mount in the

bottom of

the control center. The new

version

also comes

with

an absolutely superb

operating

and alarm- installation man-

ual. You

want

the new version.

Mounting

the

center

The

control center has only two

knockouts in the

back

the cabinet,

and they

are going to end up packed

with wires.

If a knockout is blocked

by a stud within

the

wall

you are going

to have

miserable

time fishing all the

necessary wires

through the one

re-

maining knockout, so make

certain

that

the center is mounted to the wall

between two studs. It is

easy to use an

electronic stud finder to

determine

the

position

of the studs in the wall.

While

stud finders

are available at Ra-

dio Shack, similar

devices are avail-

able at Sears for

under $10-half the

price of

the Radio Shack model.

When

you

mount the control center

be sure that

the test

switches

can be

used, and the LED indicators

can be

seen by the shortest person who will

use the

alarm system; but keep the

control center high

enough so that its

switches

are beyond the reach of small

children.

No matter what

you

decide to use

as the

main control

center, and no

matter where

you

will

place it, install

a keyswitch in

the control center's

front -panel

knockout as shown in Fig.

1. (A

keyswitch

supplied

in the

"package kit.") That way,

if every-

FIG.1-REGARDLESS

very-

FIG.1-

REGARDLESS OF WHAT YOU use

for

the recular

arming switch, there

should be a control keyswitch

the front

the

central control box.

FIG.

2-TO LEAVE A

WINDOW OPEN

while

the alarm

armed,

mount a second

mag-

net a few incies below

the magnetic sen-

sor's

main magnet. Simply

raise the

window

unti

the second

magnet is op-

posite

the

switch.

FIG.

3-A

PLLL -APART will

allow

you

leave the top Dart

of an

up -down

slider

window

Oper.

OTHER

SENSORS

CABLE CLAMP,

SERIES

LOOP

FRAME

ce.

WIN

]CW 'T

1 -=r0

U°'

,S.

FIG. 4 -THIS IS

HOW A PULL -APART

connected

to the loop.

thing else

crashes the system can be

disarmed.

The

sensors

Next, install the

various

sensors

called bugs -on the

windows

and

doors.. The easiest

window

bug to in-

stall is the magnetic switch. If you

want

able to

leave the

bottom

open for

ventilation,

install a second

magnet

about halfway down, as

shown in Fig. 2. You can then raise

the

window

until the extra magnet is

opposite the switch.

If you want

to be able to open the

top

the

window,

use the pull -apart

shown in Fig.

If someone attempts

to lower the window, the

pull

-apart

literally pulls apart and triggers the

alarm. A pull -apart is really a

300

ohm

-line

coupler

whose

contacts

are

gold -plated. If you can't get an

"alarm- type

pull

-apart,

use

stan-

dard TV connectors. Either type is

wired

as shown in Fig. 4.

As shown in Fig.

5, difficult -to-

protect basement

windows

can be

hugged with wire

lacing made from

No.

24 or No.

26 enamel- insulated

solid

wire.

Anyone attempting to

push out

the

window will

break the

wire lacing

and trigger the alarm. The

wires themselves

are

held in place

with

round T -25 staples.

Basement windows with

removable

screens and storms

can be protected

by using the ball -type

pull

-trap shown

in Fig. 6 and Fig. 7. Normally, when

the

metal

separator between the balls

is pulled out

the ball contacts don't

touch and

the alarm is triggered. But

by using the connection shown in Fig.

7, anyone forcing the window, or try-

ing to cut the metal pull wire, inter-

rupts the series loop

and thus triggers

the alarm.

Cool it

Basement air conditioners

are a

fa-

vorite

spot for

breaking

because

they

are

often

left unconnected to the

alarm. As shown

in Fig. 8, you can

wire

the A/C into the system by plac-

ing

a magnetic switch on the window

frame above

the A/C, and its magnet

the top of the A/C's frame. Use

Barge

adhesive or double

-sided

foam

tape to secure the magnet

to the air

conditioner's frame.

Every splice should be soldered for

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