Eurotec C.6-6 board

I have an ancient Eurotec board, and it uses an battery-backed siren that  goes off as soon as its input drops. It provides 14.6V to this siren.

The sensors are provided with 13.8V, and there's a reset function for smoke detectors. As far as I can tell these are normal sensors, and unfortunately they have been installed with tamper resistors properly installed near the device.

Can I replace this system with Konnected?