GSM/WEB air alarm controller for bomb shelters/shelters

Before starting to use the device, the user needs to set the region that will be monitored for air alarms in the Polymetrica personal cloud account in the settings.

Every minute, the Polymetrica server monitors the official source https://alerts.in.ua and automatically controls the built-in 15A relay – opens or closes the lock on the object.

In the event of an alarm, the server sends a command to the controller, which cuts off power to the lock, leaving the door open. After the alarm goes off, the server sends a command to the controller, which supplies power to the lock, which ensures that the door is closed.

The electromagnetic lock is connected to NS (normal closed) and C green terminal block.
The electromechanical lock is connected to NO (normal open) and C green terminal block.