Simple Door Alarm

Operation :

Simple Door Lock / Alarm with a Key switch.

When Key Switch is open, No power is apply to the EM lock. Opening the door will not cause a alarm.

When key Switch is Closed. Power is apply to them Lock. Door open will cause the Alarm relay to activate and the Siren will

On for approx.. 1 sec to 9 mins. The Timing is adjustable.

 

Door Switch

Key Switch

Fire Alarm Contact

Led Red

Led Green

Alarm Relay

EM Lock

Siren Out

( 2 9min)

Remark

1

Closed

Closed

Closed

On

Off

Off

+12V

Off

 

2

Closed

Closed

Open

Off

On

Off

0V

Off

 

3

Closed

Open

Closed

Off

On

Off

0V

Off

 

4

Closed

Open

Open

Off

On

Off

0V

Off

 

5

Open

Closed

Closed

On

Off

On

+12V

On

 

6

Open

Closed

Open

Off

On

On

0V

On

 

7

Open

Open

Closed

Off

On

Off

0V

Off

 

8

Open

Open

Open

Off

On

Off

0V

Off