Fire alarm system.

   Technical specifications.

The device board must perform the following functions and have the listed indication and control elements.  It can be implemented either on two identical boards and cross-boards, or on a single board.

Parameters:

1. Number of pyrotechnic charges (fire extinguishing directions) - 2;

2. Number of alarm loops - 4;

  - 2 for each direction.

 - Provide connection for one loop with a dry contact alarm and another with alarms that have consumption and are connected via a two-wire scheme.

3. Must have manual and automatic triggering modes (external toggle switch):

 - In manual mode, voltage to the pyrotechnic charge is supplied from a specific loop - "Manual start" - with a manual start button.

 - In automatic mode, voltage to the pyrotechnic charge is supplied when any of the two loops is triggered.

4. Must have two relay outputs (one for each direction), switching upon pyrotechnic charge activation in each direction.

5. Must include control of loop status and pyrotechnic circuit with identification of Break, Short Circuit, Normal, Fire.

6. Loop status should be indicated by 4 LEDs for each direction. 

- Green - Normal.

- Orange - Manual mode activated.

- Red - Fire.

- Orange - Fault. Implement cycling algorithm as follows:

- Short - pause – one short - extended pause -- Loop 1 break.

- Short - pause - two shorts - extended pause - Loop 2 break.

- Short - pause - one short, one extended - extended pause - Loop 1 short circuit.

- Short - pause - two shorts, one extended - extended pause - Loop 2 short circuit.

- Extended – pause - short - extended pause - Pyrotechnic circuit break.

- Extended - pause - extended - extended pause - Pyrotechnic circuit short circuit.

6. External "Reset" button is provided. When the device is turned on and the "Reset" button is pressed, all LEDs briefly (1 sec) turn on, and the device enters standby mode.

7. Power supply for the device should be from 10-30V voltage. Provide a 12V output for connecting external alarms.

8. The DESIGN must ensure operability at temperatures from -40 to +60 degrees Celsius, be resistant to shocks and vibrations. Designed for operation during transportation!!!