Homemade FACP Circuit

Anyone know how to make a latching circuit with fire alarms and light switches ? I’m making a homemade fire alarm control panel. (I can also buy anything else that’s needed)

I know NewAgeServerAlarm once made a simple relay-based panel that he called the “5001-DC”, not sure where the schematic for it might be found today though (it was on his website but that’s been dead for years).