Elenco Burglar Alarm - Manual (Page 8)

AUTO ALARM
You will not mount parts A1, B1 or S1. When someone opens a door or tries to remove the radio, the alarm
is activated and the car horn will sound (see schematic diagram below).
Connect to your car as follows. See diagram below.
Connect P4 to the wire running from the door switch to the dome light.
Connect P1 to the wire running from the horn relay to the horn switch, which is located in the steering wheel.
Connect P2 to an alarm turn-off switch (use S1, be sure to use the middle lug for one of the connections).
Connect the other end of the switch to the car battery via fuse box.
Connect P9 to the metal casing on the radio which is grounded. When the lead is separated from the ground,
the alarm will be activated and the horn will sound. If you do not want to protect a sound system, connect the
lead permanently to a ground.
Connect P10 to the car ground.
SCHEMATIC DIAGRAM
Attach a fresh 9 volt battery to the battery snap.
Connect the leads from S2 to any normally closed
switch. If you do not wish to use this switch, simply
connect these leads together. Connect the leads
from S3 to any normally open switch. When either S2 is opened, or S3 is closed, the alarm will turn on
and stay on even if switches S2 and S3 are
switched back. To reset the alarm, turn switch S1
off and then back on again. A key lock switch can
be substituted for S1.
Auto Door Alarm Connection Car Horn Connection Radio Alarm Connection
Dome Light
N.O. (Door SW.)
12V
P4
Horn SW. Horn Relay
Horn
12V
12V
P2
P1
P10
P9
Radio
SCR
Foil Side of
PC Board
ELENCO ®
150 Carpenter Avenue
Wheeling, IL 60090
(847) 541-3800
Website: www.elenco.com
e-mail: [email protected]
OPERATING PROCEDURES (Auto Alarm)
SCHEMATIC DIAGRAMS FOR AUTO ALARM
Answers: 1. 9; 2. Silico n C on tro lle d R ect ifi er (SCR ); 3 . o pe n, clo sed ; 4 . g ate ;
5. ne ga tive ; 6 . re move ; 7 . ca pa cito r; 8 . b uzze r; 9 . C 1; 10 . vo lta ge