This is a simple implementation of a smoke exhausting system. The motor is in fact a window actuator used for opening/closing a window for ventilation or smoke exhaust in case of fire.
The first source is power source for actuator, the second source and relay is actualy a module installed in fire loop sistem to automaticaly open the window. When this relay actuate it disables the two manual buttons (open/close used for ventilation).
The two pairs of relays invert the voltage on the actuator and block the other button, so that the two buttons cannot be pressed simultaneously.
Green LED shows the opening session, red LED shows the closing session.
In case of fire the window opens automatically and cannot be closed until the module is reset (relay is deactivated).
